JP2004500295A - Method and apparatus for winding a yarn on a bobbin - Google Patents

Abstract

The invention relates to a method for operating a machine, especially a winder, that winds threads. A thread is alternately guided to-and-fro between two change-over points within a traversing stroke and crosswise in relation to the drawing-off direction of the thread by means of a thread guide of a traversing device for being laid onto a rotating bobbin. The invention also relates to devices for carrying out the methods. According to the invention, an end point of the change-over of the thread guide is fixed at a change-over point. The traversing stroke is corrected, preferably shortened or prolonged, during a following stroke and according to the position of the end point. In an alternative embodiment, the actuation of the thread guide or the traversing device is controlled according to a predetermined winding ratio and a bobbin speed in such a way that the winding ratio is maintained when the bobbin speed is changed or not.

Description

【００８９】
又は、言い換えれば、往復ストローク毎のボビン回転数である。
【００９０】
この式から、綾振りのための駆動モータの相応の回転数とボビン回転数との間の伝統的な関係が導き出される（例えば米国特許第４６７６４４１号明細書参照）。この関係は、綾振り駆動装置のための適当な制御プログラムを規定するために利用される。この目的のために、この伝統的に導き出された関係は、ストロークに亘っての糸ガイドの運動特性が機械的なガイド部材（例えば溝付きローラ若しくはベーン形綾振り装置のベーン）の幾何学形状によって与えられるシステムとの関係においては、十分である。しかしながらこの伝統的に導き出された関係は、糸ガイドが単に「機械的」ではなく、それよりも高いフレキシブル性を有する「電気的」に操作せしめられる場合のためにはもはや不十分である。
【００９１】
往復ストローク数ｎ（ＤＨ）は、次の式によって表される。
【００９２】
【数２】

【００９３】
この式中、Ｖ（ＣＨ）は単一のストロークに亘っての糸ガイドの平均的な速度であり、ＨＢは相応のストローク幅である。
【００９４】
さらに、
【００９５】
【数３】

【００９６】
この式中、Ｖ（ＳＰ）はボビンの周速度であって、Ｄ（ＳＰ）は瞬間的なボビン直径である。
【００９７】
以上の式から次の関係が得られる。
【００９８】
【数４】

【００９９】
及び
【０１００】
【数５】

【０１０１】
以上の式から次の２つの結論が得られる。
【０１０２】
（ｉ） Ｖ（ＳＰ）とＶ（ＣＨ）との関係に基づく、綾巻角度（巻取角度）の所定の帯域幅を維持するために、それぞれ得ようとするボビン直径のための適当なワインディング比を選択することだけが重要なのではなく、調節されたストローク幅も考慮する必要がある。換言すれば、可変なストローク幅をプログラミングする際に、最終使用者によって与えられた綾巻角度の帯域幅を維持できるようにするために、ワインディング比の選択を、ボビン直径にも、またストローク幅にも関連して行う必要がある。
【０１０３】
（ｉｉ） 効果的に選択されたワインディング比ＷＶ及び効果的に調節されたストローク幅ＨＢのために、適当な平均的な糸ガイド速度Ｖ（ＣＨ）がボビン回転数から導き出される。
【０１０４】
以上の関係から、所望のパッケージ形状を得るために、重要な制御パラメータが導き出される。この認識を考慮することが、非常に重要な利点をもたらす。しかしながらこの認識を考慮することによっても、発展を続ける駆動技術の新たな可能性を直ちに最適若しくは完全に利用することはできない。これを実現するためには、糸ガイドの運動をストローク中に制御する必要がある。これは従来技術において種々異なる形式で示唆されているが、システム全体をどのように制御するかについては示されていない。
【０１０５】
制御システムの構成
システムの種々異なる部分を概観することができるようにするために、ここでは、システムの３つの「関数」について記載する。これらの関数は互いにソフトウエア的に接続することができるが、プログラミングの際に互いに分離して、区別しても有利である。３つの関数は次の通りである。
【０１０６】
１． 第１の巻取り技術的な関数：
この関数は、図１０〜図１５及び式１〜式５を用いて説明されている計算ルーチンを有している。この関数の「積」は、一方では綾巻角度βのための帯域幅を維持することができるようにするための適当なワインディング比の選択であって、他方では、選択されたワインディング比を維持するための適当な平均的な糸ガイド速度の算出である。この積は、一方では理論的な考慮の上で次のようにプログラミングすることができる。例えば
【０１０７】
【数６】

【０１０８】
【数７】

【０１０９】
２． 第２の巻取り技術的な関数：
この関数は、ストローク中及びストローク切換時点における糸ガイド及び糸の運動特性を規定する。適当な特性は、理論的な考慮によって算出されるのではなく、適当な方法によって経験的に算出しなければならない。それにも拘わらず、ストローク中に「プロフィール」の所定の「角頂点」を規定することが可能であり、次いでこれは個別のケースのための種々のデータに基づく経験的な結果を用いて補われる。この場合、第１の関数によって算出された基準を維持することが重要である。この基準は、運動特性を具体化するための臨界パラメータとして用いられる。これは特に（これに限定されるものではないが）平均的な糸ガイド速度を維持するために適している。従って、所望の運動特性を平均的な糸ガイド速度の（数学的な）関数として規定すれば有利である。
【０１１０】
３． モータ制御関数：
この関数は、第１及び第２の関数の結果を、制御信号に変換することを必要とする。この制御信号は、綾振り駆動モータによるローラの相応の運動を生ぜしめる。
【０１１１】
最近の駆動技術を考慮して、糸ガイドの運動特性を、ストローク中の所定の位置における加速度値若しくは速度値によって規定すれば十分である。これによって駆動技術の専門家は、選択されたモータ型式のための相応の制御信号を規定することができる。例えばこの関連性において、ヨーロッパ特許第４３５６２２号明細書及び／又はヨーロッパ特許公開第９０１９７９号明細書及び／又は国際公開第９８／４２６０６号明細書の記載を考慮することができる。この第３の関数については以下では詳しく説明されていない。何故ならば、この第３の関数は、巻取り技術に関連付けるよりもむしろ駆動技術に関連付けられた固有の特別な課題を表すものだからである。
【０１１２】
３つの関数は、図１６に概略的に示されている。ボックスＦ１は、必要とされる平均的な糸ガイド速度に相当するガイド信号を発信する計算ルーチンを示している。ボックスＦ２は、平均的な糸ガイド速度及び所定のプロフィールを用いて糸ガイド（若しくはモータ回転子）の運動特性を規定する計算ルーチンを示している。
【０１１３】
ボックスＦ３は、指針Ｚを調節されたストローク幅に亘って（若しくは相応のストローク回転角度によって）最適な形式で振動さえることができるようにするために、規定された運動特性を選択された駆動モータのための適当な制御信号に変換する計算ルーチンを示している。
【０１１４】
しかしながら専門家にとっては、指針Ｚの本来の運動を所望の「パターン」に従って制御することが実際には非常に困難であることは明らかである。従って、臨界パラメータを確実に維持するためには、有利な形式で少なくとも１つのフィードバックによって所望の制御パラメータに合わせることができるように監視を行って、できるだけ強制的に所望の結果を得るようにすること（これが前記制御信号によって得られない場合には）が賢明である。
【０１１５】
このような形式の第１のフィードバックは、指針Ｚ（若しくはその駆動装置ＡＭ）の位置のためのセンサＳ、比較器ＶＧ１及び、指針位置のための目標値発信器ＳＷ１で示されている。この場合、比較器からシステム修正が導き出される。第２のフィードバックは、比較器ＶＧ２と目標値発信器ＳＷ２で示されている。
【０１１６】
本発明によれば、監視は第１の関数の範囲内で行われる。修正は、算出された平均的な糸ガイド速度（ＶＧ１によって）及び／又はストローク幅のための目標値（ＶＧ２によって）の修正の形で実施することができる。このような監視を可能にする装置の構成については、図１〜図４を用いて以下に説明されている。この場合まず、糸ガイドのための所定の反転ポイントの維持に関する前記問題に関して説明する。高速で必要とされる高い往復ストローク数においては、糸ガイドが直ちにまず理論的な反転ポイント（例えばＵ１又はＵ２、図１４）で停止し、次いで反転方向で移動することは考慮されない。糸ガイド運動の反転は、常に所定の誤差を伴う。従ってこの事実を、ワインディングのための受容限界内にその意義を維持するために考慮することが重要である。この場合このような限界は、機械の使用者によって（固有の品質要求に基づいて）規定される。
【０１１７】
適した実施例
図１には、一方の反転ポイントにおける反転時の糸ガイドの終点のずれを形成する可能性が示されている。図示していない駆動装置のエンコーダ１１０は、例えばフィードバック法に従って評価される評価装置にパルスを供給する。評価装置１１２は目標反転ポイントを供給し、この目標反転ポイントは実際ストローク反転ポイントＩとしてメモリー有利にはフラッシュメモリー１１３に供給される。この実際値Ｉは、さらにコンピュータ１１４に供給される。制御コンピュータとして設計されたコンピュータ１１４には、糸ガイドの綾振り速度Ｖ_ＣＨも、目標値として使用される正確なストローク反転ポイントもメモリーされている。目標値Ｓから実際値Ｉを減算することによって、差、糸ガイドの追従誤差及び、それに起因する、糸の前記引っ張り誤差が算出され、これらが、綾振り速度Ｖ_ＣＨに関連して、コンピュータ１１４の追従表１１５にメモリーされる。往復ストローク数が飛躍した時には、糸ガイド及び糸の予期された追従誤差が表１１５から補間法によって計算され、それによって、糸ガイドの新たな反転ポイントを考慮する相応の制御命令が制御装置に供給される。
【０１１８】
図２は、図１に対する変化実施例が示されていて、エンコーダ１１１を有しており、このエンコーダ１１１はその信号を評価装置１１２に供給し、この評価装置１１２はその結果から実際ストローク反転ポイントを供給する。この場合、制御コンピュータ１１４は反転の目標値をフラッシュメモリー１１３に供給する。目標値Ｓに対する実際値Ｉの偏差の算出は、コンピュータ１１４の外部で行われ、この場合、この偏差はさらに計算後にコンピュータ１１４及び目標値発信器１１６に供給される。追従表１１５では、前記偏差が、綾振り速度ＶＣＨに関連してメモリーされる。目標値発信器１１６は、偏差値を得てから相応の制御命令を駆動装置の回転数調整器１１７に供給する。
【０１１９】
図２に示した可能性においては、各ストローク後に綾振りストロークの修正が行われる。これによって、このシステムは発生した追従誤差を、図１に示した解決策におけるよりも著しく迅速に調整することができる。
【０１２０】
目標値と実際値との偏差の計算は、一般的に綾振りの左側及び右側のために行われるので、左側及び右側の巻取り側のための目標値がコンピュータ１４若しくはメモリー１３に同時に存在している。
【０１２１】
図３には、所定の巻取り回転数における所定のワインディング比を得るために算出される、糸ガイドとしての指針の平均的な移動速度若しくは平均的な角速度ω_ｍの計算方法が示されている。入力装置１３０によって、顧客特有の運転データＢＤ、例えば綾巻角度、帯域幅、ストローク幅その他が入力される。さらにまた、綾巻の制御のために重要な、有利には不変の構成データＫＤが与えられる。この構成データＫＤは、綾振りＳＤの調節データの計算のために使用される。しかも、特に良好なワインディング比が維持されている分数表ＢＴが用意されている。
【０１２２】
運転データＢＤ、分数表ＢＴ及び構成データＫＤから、実際に計算されたボビン直径ＳＰＤと共にワインディング比の表ＷＶが得られる。ワインディング比の表ＷＶでは、ボビン直径とストローク飛躍の指示とストローク幅又はストローク長さとから成るデータセットが形成される。これによってストローク飛躍が、所定のボビン直径において導入される。飛躍自体は、許容される綾巻角度変化によって制限される。
【０１２３】
実際のボビン直径を算出するために、一方では綾振りＳＤの調節データが考慮される。他方ではこのために、接触ローラｆ_ＴＷの周波数もまた、ボビンｆ_ＳＰの周波数も使用される。
【０１２４】
それと同時に、周波数パルスｆ_ＳＰがさらに目標値カウンタＨ_ＳＯＬＬに供給される。ストローク中の目標値位置を計算するために、ワインディング比の表ＷＶは、ボビン直径のための値をストロークカウンタＨ_ＳＯＬＬに供給する。
【０１２５】
綾巻き装置の駆動装置はストロークカウンタを有しており、このストロークカウンタは糸ガイドの実際位置を記録する。糸ガイドの実際位置と目標位置との比較から調整器１３１に調整値及びガイド値が得られる。この調整器１３１の調整値は、平均的なワインディング速度若しくは角速度ω_ｍである。
【０１２６】
所定のボビン回転数においてワインディング比ＷＶを維持するために、ワインディング比ＷＶを高い分解能で監視すれば有利である。このためにタコセンサ（回転数センサ）がボビン回転数毎の所定数のパルスｆ_ＳＰを供給する。これによってタコ（回転数）のパルスに、所定のワインディング比のために正確に算出可能なストローク経路が対応配置される。
【０１２７】
図４には、綾振り装置のサーボ装置のための加速度値を計算するための概略図が示されている。このために、例えば周期的なストローク増減（Ｈｕｂａｔｍｕｎｇ）のための重要な別の運転データＢＤが、有利には使用者によって手動で予選択される。周期的なストローク増減のために重要な値は、特にストローク周期、ストローク分布及びストローク振幅その他である（以下参照）。
【０１２８】
以上の運転データＢＤから、ストローク幅ＨＢを計算するために用いられる調節データが規定される。制御のための構成データＫＤ、特に指針長さ及び１ストローク中の速度プロフィールのプロフィール表ＰＴから、綾振りの別の調節データが得られる。この別の調節データはさらに、駆動装置ＡＳの加速度値のために使用される。この運転データＢＤと構成データＫＤと分数表ＢＴとから、ワインディング比の表ＷＶが規定される。このワインディング比の表ＷＶは、ボビン直径の関数におけるストローク長さの延在形状も含んでいる。ストローク周期カウンタＨＰは、実際値カウンタＨ_ｉｓｔの値又はパルスによって負荷される。
【０１２９】
ストローク周期カウンタＨＰと、ワインディング比の表ＷＶから得たボビン直径Ｄ（ＳＰ）に相当するストローク幅と、運転データＢＤで規定された、周期的なストローク増減の経過（ストローク数の関数で）とから、実際のストローク幅目標値ＨＢが規定される。ストローク幅目標値ＨＢと、ワインディング比の表ＷＶと、プロフィール表ＰＴと、平均的なワインディング速度若しくは角速度ω_ｍとから、サーボ駆動装置の加速度値ＡＳが規定される。ストローク周期ＨＰのカウンタは、サーボモータの実際ストロークカウンタの信号又は値によって負かされるストロークカウンタからデータを得る。綾振りの調節データと、計算されたストローク幅と、同様に計算された平均的なワインディング速度とから、綾振り装置のサーボ駆動装置のための加速度表ＡＳが計算される。
【０１３０】
全体として、加速度表ＡＳの計算によって、ワインディング比及びボビン回転数を維持しながら、回転するボビン上に糸を非常に正確に巻取ることができる。
【０１３１】
図５には、周期的なストローク増減のパラメータ化のための例が示されている。周期的なストローク増減は、全巻取り過程中のストローク幅の変動を生ぜしめる。
【０１３２】
図５は、ストローク振幅Ａを有する公称ストロークの時間的増減を示す。ストローク振幅Ａは、公称ストロークＨＢの１‰で選定することができる。ストローク分布Ｖは、振幅の低下に対する上昇の比を例えば周期の‰で提供する。ストローク周期Ｐは、調整サイクルの時間的な長さを示していて、綾振りストロークの単位で表すことができる。調整の別の変化実施例では、周期Ｐは往復ストローク数（ｎＤＨ）又はボビン直径又は巻取り時間にも関連している。
【０１３３】
前述のように振幅調整の少なくとも２つの異なる組み合わせを交互に用いることもできる（図７）。これによって、一時的にストローク幅を一定に維持することも可能である（図８）。この場合、振幅Ａ_２及び／又はストローク分布Ｖ_２はゼロに等しい。図６は、１ストローク中の速度プロフィールを示している。速度プロフィールは、支持点Ｐ_０〜Ｐ_８において規定されていて、端部ストッパＥ_１とＥ_２との間の綾振り装置若しくは糸ガイドの（相対的な）速度を設定する。端部ストッパＥ_１及びＥ_２は、実際のストローク幅に応じてボビンに適合せしめられる相対的なストローク幅を示している。同様に、支持点Ｐ_０からＰ_８は平均的な変位速度に関連した相対的な速度値として表されている。所定の速度プロフィールと実際のストローク幅とから、制御コンピュータがサーボ駆動装置のための速度プロフィールを算出し、この際に、ワインディング比及びボビン回転数はほぼ正確に維持される。
【０１３４】
図９は、支持点Ｄ_１及びこれに属するストローク幅ＨＢ_１を介して規定されているボビン直径に基づくストローク幅ＨＢの、回転数に関連した変化を示している。例えば４つの支持点Ｄ_０からＤ_３並びにＨＢ_０〜ＨＢ_３が示されている。勿論、往復ストローク数ｎ_ＤＨ又は巻取り時間ｔに関連したストローク幅の変化を行うことができる。
【０１３５】
周期的なストローク増減のためのパラメータ及びストローク幅変化（例えば図７）は、前もって与えられた規定のメニューでも、また作業員によっても前もって与えることができる。このようにボビン製法を準備することによって、全体的に糸の巻取り時の作業が軽減される。
【０１３６】
この装置は有利には、得ようとするボビンのストローク幅（ＨＢ）を使用者が前もって与える（制御装置に入力する）必要があるように選定されている。このような前もって与えられたストローク幅を用いて、制御装置（有利にはコンピュータ）は、右側のボビン縁部における糸ガイドの反転の終端ポイントのための目標値（ＲＲ）を、また左側のボビン縁部における糸ガイド反転の終端ポイントのための目標値（ＬＲ）を算出し、巻取り過程のために規定する。この目標位置は、パッケージ巻成のための規定された基準点（初期点）も、また同時に綾巻の駆動制御装置のための第１の目標値（目標反転値）も形成する。従って、左側（右側）のボビン縁部における糸ガイドの反転の終端ポイントは、相応の目標反転ポイントと一致する。既に上述したように、糸ガイドが制御装置で規定されたいずれかの目標反転ポイントで正確に停止せしめられてその「反転運動」を開始するように、制御装置によって移動せしめられることは、あり得ないことである。換言すれば、糸ガイド運動の本来の終端ポイントが制御装置によって規定された目標反転ポイントに対して常にずれていること、つまりこの目標反転ポイントに対する誤差が発生することを考慮しなければならいない。従って制御装置は、測定された誤差と制御装置で規定された目標反転ポイントとの合計がそれぞれ、反転の終端ポイントのための有効な目標ポジションを表していることを考慮することができる。反転の終端ポイントのための有効な目標ポジション自体は、全巻取り過程に亘って、得ようとするボビン形状に関連して可変である（周期的なストロークの増減その他）。瞬間的に得られた目標反転ポイントに対するそれぞれの誤差は、直接影響することはないが、このために制御装置は、この制御装置によって規定された目標反転ポイントに合わせて、誤差の有効値を考慮することができる。しかしながら、目標反転ポイントが制御装置によって自由に規定できるにも拘わらず、反転の終端ポイントのための目標位置は巻取り過程の入力されたデータにのみ従って可変である。
【図面の簡単な説明】
【図１】
反転点における糸ガイドの反転時における偏差を算出するための装置を示す概略図である。
【図２】
図１に示した構成の変化実施例を示す図である。
【図３】
平均供給速度を算出するための概略的な図である。
【図４】
サーボ駆動装置の加速を算出するための概略図である。
【図５】
ストロークの周期的伸縮をパラメータ化するための例を示す線図である。
【図６】
速度プロフィールを表す線図である。
【図７】
ストロークの周期的伸縮の組み合わされたパラメータ化の例を示す概略図である。
【図８】
ストロークの周期的伸縮の組み合わされたパラメータ化の別の例を示す概略図である。
【図９】
連続的なストローク変化のパラメータ化の例を示す概略図である。
【図１０】
国際公開第９９／６５８１０号明細書の図１のコピーである。
【図１１】
国際公開第９９／６５８１０号明細書の図２のコピーである。
【図１２】
国際公開第９９／６５８１０号明細書の図３のコピーである。
【図１３】
国際公開第９９／６５８１０号明細書の図４のコピーである。
【図１４】
国際公開第９９／６５８１０号明細書の図５のコピーである。
【図１５】
綾振りのためにの「ワインダ周囲」の概略図である。
【図１６】
本発明による制御システムの概略図である。[0001]
The present invention relates to a method for winding a yarn on a bobbin.
[0002]
Background technology (drive technology)
EP 453 622 proposes a device with a thread guide and a thread guide support, in which the support is guided in a groove. This known device has a drive motor and a programmable controller. While the thread guide is located near the reversal point, the motor is operated with a current higher than the output current. If the thread guide is located in another area, the current required for operation is less than the rated current. A basic program is stored in the control unit for the various winding sections. The control device calculates the distance, speed, and acceleration related to the motor motion based on the applicable winding rule. The memoryable parameters include the basic stroke and the basic stroke variation for obtaining a soft package edge.
[0003]
In the illustrated configuration, the stepper motor acts as a drive motor between the mid-stroke and the reversal point against a torsion spring. Near the reversal point, the spring constant is increased, the power supply in the stepper motor is increased and the frequency of the control pulses of the stepper motor is reduced. This causes the motor to stop at the reversal point. No corresponding monitoring device is provided. A sensor is provided in the middle of the stroke that allows recognition of the error at this position during the traversing stroke. The traversing stroke is always controlled from this position by a pulse sequence. The exact identity of the reversal point cannot be inferred from the publication.
[0004]
In a known method from EP-A-453 622, the position of the thread guide is associated with the position of the rotor of the electric motor. The thread guide is moved with very high acceleration and deceleration in the reversal zone. In this case, the electric motor movement is controlled by the control unit in the context of conventional winding rules. However, a problem occurs when the yarn is dropped on the bobbin edge.
[0005]
The method known from EP 453 622 is subject to physical and technical limitations. The stepper motor physically forms a spring-mass system that tends to oscillate upon rapid position changes and performs uncontrollable movement. The reference or zero position is passed twice during one movement of the thread guide. The positioning accuracy other than the zero position is not specified. Thus, at relatively high rotational speeds, for example, at production speeds of 1000 m / min, the method can no longer work with the required accuracy.
[0006]
EP 248,406 describes a traversing device having means for calculating the stroke according to the winding ratio based on the rotational speed of the bobbin and the package diameter. However, this invention also does not show a solution for the problem at the bobbin edge.
[0007]
Further, WO 98/42606 discloses a method of controlling a traverse device driven by a step motor and a traverse device. The position of the traversing thread guide reciprocating within one traversing stroke is defined by the position of the rotor of the step motor, where the rotor moves inside the stator of the step motor having a plurality of windings. The purpose of the method is to guide the traverse yarn guide within the reversal zone with the step motor optimally loaded. Further, it is desired to drive the traverse yarn guide in the stroke reversal region with as little vibration as possible. This is achieved in that the movement of the rotor is controlled by a stator magnetic flux which is defined on the basis of the stator voltage generated by means of the magnetic flux control device. That is, the magnitude of the magnetic field generated directly by the stepper motor is used to control the traversing device. Thereby, it is desirable that high dynamic control of the driving device is achieved as a whole. This application relates generally to the control of step motors, not to the construction of packages on bobbins.
[0008]
Furthermore, a method and a device are known from WO 99/05055, which attempt to enable the yarn to be positioned accurately within one traversing stroke. Furthermore, we want to guarantee the optimal use of an electric motor (step motor) for every traverse stroke. An adjustment is always made between the actual position of the thread guide and the target position. If the actual position differs from the target position, a difference signal for controlling the step motor is generated. The target position is defined exclusively by the electric motor. If the actual position differs from the target position, the electric motor receives a current of varying amplitude via a frequency signal. If a deviation is detected, the deviation error of the traversing thread guide is corrected immediately, since the stepping motor reacts quickly and directly according to the method.
[0009]
Furthermore, the prior art publication DE 198 07 030 discloses a method and a device for winding a continuously flowing yarn into a package formed on a winding tube. Have been. The traverse yarn guide is accelerated to the guide speed based on the final acceleration at a stroke end within one reversal section, and finally decelerates at a stroke end in another reversal section located on the opposite side. The speed is reduced from the guide speed and reversed. As a whole, the traverse stroke defined by the reversal point is obtained by adding three partial sections, namely a reversal section (acceleration), a straight section and a reversal section (deceleration). The acceleration and deceleration of the yarn guide are controlled so that the length of the reversal section and the packaging of the yarn at the end of the bobbin in the reversal section change. This causes the yarn to be packaged at various angles with respect to the bobbin end face, as the yarn reversal will be introduced to begin earlier or later with respect to the end of the traversing stroke. We want to have an even distribution of yarn after the reversal point. In this case, the course of movement of the yarn guide in the reversal section is defined by a predetermined temporal program sequence.
[0010]
This known method also makes it possible to control the acceleration and deceleration of the yarn guide in relation to the traversing angle, the bobbin diameter and the traversing stroke in the reversal section. As a whole, many possibilities are obtained from combinations and variations of the reversal section and the traversing stroke. Thus, the method can also be used, for example, to keep the length of the reversal section constant within the reversal zone, independent of the traversing speed. Similarly, it is also possible to change the traversing stroke by selecting a periodic increase or decrease of the stroke (Atmungshub).
[0011]
DE-A-198 20 264 describes a motor arrangement specifically conceived for use in a swivel drive.
[0012]
According to this document, it is generally said that at the end of the traversing stroke, the traverse yarn guide is decelerated from the guide speed for a very short time and then accelerated again to the guide speed. That is. In the ideal case, the reversal of the stroke takes place exactly at a predefined target reversal position. This assumption is mostly valid only when the number of round trips is very small (<about 100 round trips / minute). In practice, it is possible to recognize the overrun amount or the negative overrun amount of the traverse yarn guide in the process reversal.
[0013]
It is therefore generally accepted that today's control systems do not yet cover the high demands placed on the required dynamics. This causes the yarn to be packaged with a certain degree of deviation, rather than accurately, during the stroke reversal at the target stroke reversal point.
[0014]
Background technology (winding technology)
In addition to the above-mentioned problems in reversing the stroke, another problem arises in distributing the yarn to the bobbins in a desired or advantageous shape, ie in a predetermined bobbin or package configuration. The bobbin winding type is divided into three main types. That is, coarse winding, precision winding, and step precision winding. In wild winding, apart from the so-called "wobbling" (to avoid the formation of a mirror image), the ratio between the bobbin surface speed and the yarn traverse speed is almost constant. Thus, the yarn winding angle is kept constant, but the winding ratio, that is, the number of rotations of the bobbin per reciprocating stroke, decreases as the diameter of the bobbin increases. The formed yarn package has a very uniform density, but has poor pay-out properties and is not uniform after dyeing.
[0015]
Precision winding is obtained by a constant ratio between the bobbin rotation speed and the yarn traverse speed. Therefore, the winding ratio is the same during the entire winding process. However, the yarn winding angle decreases as the bobbin diameter increases. Bobbins have good payout characteristics and generally have a very large running length for the same bobbin volume. However, as the twill angle decreases, the winding density increases outward. This may cause the dye to penetrate unevenly during dyeing.
[0016]
Step precision winding is precision winding performed stepwise. After each step, the yarn winding angle is returned again to the original number of angles. This results in a substantially constant twill angle and the winding ratio is reduced in steps. The substantially constant twill angle ensures the stability and uniform density of the yarn package. The defined winding section of precision winding prevents the ribbon winding zone and provides a high winding density. The formed bobbin has good payout characteristics and a very large running length compared to the coarse winding.
[0017]
The winding technical principle of the formation of a so-called step precision winding is well known. Here, only matters relating to the patent specification will be described.
[0018]
DE-B 26 49 780 describes the basic principle of step precision winding by means of a drive controlled by a computer, but for a winder with a friction roller drive. A description of a similar principle is given in EP-A 118 173, but mainly for traversing using a motor frequency-controlled by a frequency converter.
[0019]
The problem of selecting an appropriate winding ratio has been addressed in EP-A 55849 and US-B 4,676,441 (or EP-A 150 771).
[0020]
In U.S. Pat. No. 4,515,320 (or DE-A 3332382), the necessary relationship between the sheave winding angle of the package (bobbin) and the winding ratio is shown as a function of the bobbin diameter. The drive technology proposed here with a servo-controlled, belt-driven coupling between the bobbin mandrel and the traversing device is not suitable for enabling effective control at relatively high bobbin speeds. .
[0021]
The concept of "bandwidth" for the twill winding angle is described in U.S. Pat. No. 4,515,320, U.S. Pat. A further refinement is shown in B56005295 (or EP-B629174). According to this concept, when the twill winding angle reaches the lower limit of the predetermined bandwidth, the winding ratio "leaps" from one value to another. The input (detection) of the progress of the twill winding angle by "support point" is described in particular in U.S. Pat. No. 5,605,295.
[0022]
New improvements in this area are characterized by improvements in drive (control) technology. Improved technology allows precise control of the winding characteristics. See, for example, EP-A 562 296 (consideration of the change due to "leaping" in the yarn storage speed due to adaptation of the bobbin rotation speed).
[0023]
"Electrical connection" between the bobbin mandrel and the traverse device is described in U.S. Pat. No. 4,394,986 (or EP-A 64579) and U.S. Pat. No. 5,439,184 (or EP-A 561188). However, in these two cases, it is proposed to first control the mandrel rotation speed and the rotation speed of the traverse drive, and then to execute the control of the traverse drive according to the comparison result. ing. The time delay associated therewith prevents the maintenance of the necessary winding properties which are very critical.
[0024]
Step precision winding requires a relatively long time for the production of a cylindrical bobbin. Recently, there is a drive for the bobbin unit which favorably changes the stroke width during the entire winding process. An example of this drive has already been described in the preceding section as prior art.
[0025]
In particular, EP 629 174 B1 discloses a method which is customary today and a corresponding device for winding yarns with step precision winding. In the entire winding process, when the twill winding angle reaches the lower limit at a predetermined winding ratio, a jump from a relatively high winding ratio to a relatively low winding ratio occurs. The jump height is limited by an upper limit, which avoids unacceptable sudden changes in the winding characteristics.
[0026]
A yarn traversing device capable of realizing step precision winding is known from WO 99/65810, and in particular according to WO 00/24663, is combined with a control device. The control device defined by the software of the yarn traversing device (pointers) is provided with "invariantly defined" parts which cannot (and should not) be influenced by the user, and preferably with a predetermined winding And the part required by the user. The winding parameters include, for example, a twill winding angle, a bandwidth (Bandbreite), a fraction table, a stroke expansion and contraction (Hubatmung), a stroke progress, and the like. This document proposes that various "traversing methods" which cannot be changed by the user when entering the winding parameters should be programmed invariably.
[0027]
Oddly in the context of a wide range of prior art, the new drive technology (albeit already available and with relatively high flexibility) is still a part of the previously used winding technology of step precision winding. The foundation has not been verified. Furthermore, it is strange that no control principle has been shown so far to use the new drive technology at feed rates of about 2000 m / min or more. Further, according to this specification, it appears that a reversing aid or end stop is required to maintain the bobbin edge.
[0028]
The present invention
Starting from the above prior art, the task of the invention is to make good use of the new drive technology measures for winding technology. This, in some cases, improves the construction of the bobbin package so that the yarn to be wound is placed better and more precisely at the end of the traverse stroke reversal point. In addition, the thread is to form the bobbin almost optimally by precision winding or step precision winding, taking into account the package shape set or defined by the user.
[0029]
According to the present invention, a bobbin unit is provided from the following four viewpoints. The bobbin unit has at least one bobbin mandrel and a traversing device, which is provided with a controllable drive so that the stroke width can be varied during the entire winding process. The invention is specifically intended for use with a pivot drive. In this case, the movement of the reciprocating thread guide is defined by the movement of the motor rotor, which causes the motor to rotate the rotor between reversal points having an angular spacing of less than 360 ° (preferably less than 180 °). A control device for rotating is provided. In particular when controlling the formation of the step precision winding, it is particularly desirable to take into account a presettable stroke width.
[0030]
In a first aspect, the traverse drive is controlled according to the winding speed and a presettable winding ratio. In this case, the effective winding ratio is selected by the control device from a plurality of possible winding ratios, i.e., based on the parameters affecting the twill winding angle and the effective stroke width.
[0031]
In a second aspect, the stroke width to be maintained by the traversing device is set, in which case the stroke width to be set is defined with respect to a reference (preferably with respect to the center of the stroke). Has a predetermined, preferably constant direction around the bobbin unit, in particular with respect to the bobbin mandrel.
[0032]
In a preferred embodiment, the target reversal point is defined as a function of the set stroke width. The target reversal point is advantageously variable or modifiable to help maintain the set stroke width.
[0033]
In a third aspect, the average speed of the yarn guide over one stroke is calculated based on the effective winding ratio and the effective stroke width from the bobbin rotation speed.
[0034]
In a fourth aspect, the movement of the yarn guide over one stroke is controlled according to a predetermined movement characteristic (profile), in which case the average speed of the yarn guide set by the control device is maintained. The motion characteristic advantageously defines an acceleration value and / or a speed value which are maintained at a given point over the journey. Advantageously, the integral of the average speed of the thread guide set by the control device is maintained. The best kinetic characteristics can be calculated empirically and can be (advantageously) varied during the entire winding process (ie from the beginning to the end of the formation of a given bobbin).
[0035]
In addition to the above four aspects, the present invention provides a method for operating a yarn winding machine, in particular a winder. In this case, the yarn guide of the traversing device guides the yarn back and forth between the two reversal points in one stroke alternately in a direction transverse to the yarn drawing direction so that the yarn is supplied onto the rotating bobbin. . With this measure to solve the problem, the reversal point or the turning point of the thread guide is defined or accurately maintained during the entire winding process. According to the present invention, in a method for operating a yarn winding device, in particular, a winder, an end point of the direction change of the yarn guide is detected at one reversal point, and an effective traverse is performed according to the position of the end point. The stroke (effectively set stroke width) is modified during a subsequent stroke, advantageously shortened and extended. However, the target traverse stroke defined according to the set stroke width remains constant (invariant).
[0036]
The following points are particularly important when forming a bobbin. Stroke accuracy, high-speed yarn guide, mechanical configuration (for example of the yarn guide), actuation of the drive (servo motor or step motor). These important points are intricately linked and influence each other. These complex interactions create great difficulties.
[0037]
In essence, two main criteria are important with respect to drive availability, primarily acceleration and reversal point accuracy. The higher the reachable acceleration of the yarn guide, the better the density distribution in the package can be controlled. The accuracy of maintaining the reversal point further directly determines the quality of the package end face, and thus the tensile and transport properties.
[0038]
When changing the reciprocating stroke every minute, the reversal point at the end of the traversing stroke contains a variable error as a function of the reciprocating stroke or speed. Generally, a servomotor having two control devices (a load monitoring device having a status / position control device and a current control device) is mainly used for driving the traverse yarn guide. The position of the motor rotor and thus the position of the thread guide can be detected by a suitable measuring device. Such devices are commercially available. Known encoders or absolute value transmitters are suitable.
[0039]
The inaccuracy of the inversion can be prevented by providing and expanding a kind of “memory function” in the control circuit. When passing through the reversal point during one traverse stroke, the position of the actual reversal point is detected when the direction of the yarn guide is changed. Such a position value is stored and affects the control device of the driving device, and in the subsequent stroke, the traversing stroke, that is, the effective stroke of the thread guide, is changed according to the position of this position value. (Shortened or extended). As a result, a precisely defined bobbin edge is obtained after the entire winding process. This is because the error is calculated and removed by the correction device according to the invention.
[0040]
Advantageously, the (effective) traverse stroke is modified based on the difference between the end point and the reversal point. In this connection, the two reversal points of one traverse stroke are regarded as a target value, and the actual end point is regarded as an actual value. The difference thus produced is the target-actual deviation, which controls the effective traversing stroke accordingly, so that the desired exact bobbin edge is produced.
[0041]
Therefore, the target reversal point is changed according to the actual reversal point (actual value) if necessary to maintain the target stroke width.
[0042]
Unlike the previous control of the step motor, which focuses on the displacement of the step motor from the target value and the quick follow-up (adjustment) performed when the displacement is detected, the present invention is firstly effective. It is an object to repeatedly bring the end point of the traversing process to a predetermined location. In this case, the entire winding process can be completely monitored. In this case, a further difference is that the position of the yarn guide is important when feeding the yarn to the bobbin.
[0043]
In the configuration of the present invention, the difference between the actual end point and the target reversal point over a plurality of strokes is averaged. Such calculation can be performed continuously by, for example, a sliding calculating means. Thus, the correction may be performed only when a large numerical displacement or deviation is recognized, for example.
[0044]
Further in accordance with the method of the present invention, the traversing stroke is modified at any stroke value during the entire winding process. Thus, such a method is variable, since the correction takes place only under certain conditions for controlling the drive. The control is established automatically or automatically, for example, when the traversing stroke is shortened or extended. Alternatively, the user can specify that the traversing stroke is corrected after a predetermined number of reciprocating strokes have been performed, for example.
[0045]
Depending on the detected deviation between the actual end point and the target reversal point, the traversing stroke can be corrected in a stroke that is performed immediately thereafter.
[0046]
By calculating the difference between the target value and the actual value of the stroke reversal point (subtracting the end point from the reversal point), the (actual) following error is calculated. By adapting to the target value for the reversal point, the tracking error is modified to adapt the effective stroke width to the target stroke width. This is possible because the reversal point is not set "immobile" and the control can be adjusted according to the target stroke width.
[0047]
According to another embodiment of the invention, the tracking error can be taken into account in the control device as a function of the traversing speed and / or the acceleration. The tracking error is preferably stored in a so-called table as a function of the traversing speed and / or the acceleration. Such a table can be used to calculate subsequent trajectory curves.
[0048]
When a jump in the winding ratio and a jump in the number of reciprocating strokes occur as a result of the rule of the step precision winding, an expected following error is interpolated from the table and subtracted from or added to the stroke width. As a result, a shortening or a lengthening of the stroke caused by a jump in the number of round trips is compensated. This greatly improves the control of the drive.
[0049]
In order to obtain different package shapes of the bobbin, the stroke width is advantageously varied during the entire winding process. However, the stroke width can be changed, for example, by a certain stroke expansion and contraction, which has a good effect on the thread distribution during the reversal of the stroke and thus on the bobbin hardness distribution.
[0050]
According to the general principle of the invention, the method according to the invention makes it possible to preset the course of the stroke target reversal point in the entire winding process, and this set course is detected (at the reversal point). It is affected according to the deviation, in other words corrected. The course of the stroke target reversal point is preferably defined by the input of the course width course.
[0051]
In order to carry out such a method, the machine for winding the yarn, in particular the winder, has a traverse device, in which the yarn is guided by the yarn guide of the traverse device in a direction transverse to the yarn pull-out direction. The traverse device is provided with a rotating bobbin by being reciprocally guided within one traversing stroke alternately between two reversal points, and the traverse device has a reciprocating drive device. Such a machine is provided with a detecting device for detecting the end point of the yarn guide when the stroke is reversed, and for correcting the effective traverse stroke according to the position of the end point, advantageously for shortening or extending. A control device. This device can maintain a predetermined (target) stroke width.
[0052]
The aim of the invention is also to allow for fine or step precision winding, taking into account the advantageous or predetermined package shape of the bobbin. For this purpose, depending on the predetermined winding ratio and the rotational speed of the bobbin, the drive of the thread guide or the traversing device maintains the winding ratio almost exactly at the predetermined bobbin rotational speed or when changing the bobbin rotational speed. Is controlled as follows. The winding ratio is obtained from the quotient of the bobbin rotation speed and the number of reciprocating strokes (referred to as a denominator). By maintaining the winding ratio at a predetermined or actual speed of the bobbin, the time for the stroke is defined. From the basic state of this value, the driving device or the servo driving device of the yarn guide can be accurately controlled and driven.
[0053]
The stroke width and / or the winding ratio can be varied during the entire winding process in order to obtain a special package shape of the bobbins with yarn. As soon as the value changes, the drive receives a completely new control command or value. This control value is also suitable for changing the bobbin rotation speed which is directly related to the winding ratio.
[0054]
In order to obtain the desired bobbin shape when supplying the yarn to the bobbin, the effective stroke width can be changed in the entire winding process. One measure is a continuous change of the stroke width which takes place during the entire winding process. Such an adjustment results in a predetermined package geometry, for example a conical bobbin. In another variant embodiment, a stroke expansion and contraction is performed in which the effective stroke width is changed periodically, thereby eliminating the accumulation of accumulated yarns which may be caused by acceleration or delay in stroke reversal. This has an effect on the homogeneity of the yarn distribution over the stroke and on the embossing by saddles (hard bobbin edges). Of course, both embodiments can be combined with each other. The parameters for stroke displacement and / or stroke expansion / contraction can be entered, for example, by an operator. Advantageously, the supply of the yarn to the bobbin is effected as a function of the bobbin diameter and / or time (elapse) and / or the number of strokes and / or the stroke width. Optionally, a permanent or variable action is programmed in a computer or a memory. Stroke expansion is parameterized in at least three numerical values: stroke period, stroke amplitude, and stroke distribution.
[0055]
The stroke cycle represents the length of the cycle of the cyclic expansion and contraction of the stroke (for example, 100 to 4000 traversing strokes). The stroke amplitude can determine the increase or decrease of the nominal stroke (eg, ‰ of the nominal stroke). The increase / decrease ratio of the stroke amplitude is represented by a stroke profile (unit:% of period). These parameters may be independent of length or speed. Further, in another configuration, it is possible not only to repeat the combination of these three parameters but also to alternately call at least one other combination. The stroke course is defined by the support points or support points associated with the diameter and is interpolated therebetween. Instead of diameter, time or speed can also be used as an adjustment parameter.
[0056]
It is furthermore advantageous if the speed profile of the thread guide or traversing device between the reversal points of the stroke is set. The speed profile serves for setting a target value for controlling the drive. By way of example, the course of the speed profile through the support points or the support points causes a definable package shape to be rolled up. The course of the speed profile particularly affects the yarn deposition and thus the package hardness profile. Since these characteristics are also influenced by other operating parameters, several speed profiles can be filed in the control computer of the drive and prepared for a call.
[0057]
In a refinement of the invention, the speed profile is formed independently of the stroke width during the winding process and / or is related to the average feed speed. The ability to produce packages of different lengths in a machine for winding up yarns allows a speed profile independent of the stroke width, which makes it possible to use a large number of package bodies of different lengths in this machine. Can be. The association with the average feed rate also makes the rate profile independent. This is because, for example, the absolute speed is not driven by the thread guide. The relative speeds or relative speed profiles generally result in the same or similar package shapes in packages of different lengths.
[0058]
Independent of the absolute speed value which serves for the setting of the setpoint for the drive, according to the invention, the average feed speed can be defined by the stroke width and the winding ratio and the package speed. Defined or required by time or number of double strokes. Alternatively, the average feed rate is given by the time integration of the rate over one stroke. Therefore, the speed profile must have exactly the average speed over the entire stroke. Starting from these values, the setpoint and acceleration values for the drive can be determined or calculated.
[0059]
(Step) For precision winding, it is necessary to maintain a specified winding ratio at a specific package rotation speed. Thus, the stroke time can be obtained using the stroke width. The rotation speed of the package changes continuously based on the increase in the diameter of the package due to winding. Furthermore, it must be taken into account that the winding ratio for precision winding (step) is defined from the settings for the twill angle, bandwidth and fraction table. The "fraction table" contains the fraction of the winding ratio (see EP 55849 and U.S. Pat. No. 4,676,441).
[0060]
(Step) To form a precision winding, it is advantageous to maintain the defined winding ratio with very high resolution (on the order of about 10 ppM). In order to achieve this, it is desirable that the supply speed (and thus the number of double strokes per unit time) follow the package speed at a specified conversion ratio with very high accuracy.
[0061]
If the rotational speed of the package is detected for this purpose by conventional rotational speed measurement, it will be difficult to achieve the required accuracy. The cause is too low resolution of the measurement result or too short a measurement interval. In order to avoid such an obstacle, it is possible to select a means for immediately causing a specific stroke distance to correspond to a specific number of package rotations or a fraction of the number of package rotations. According to the invention, a specific stroke distance is associated with a pulse of the target stroke counter for a specific winding ratio and a predefined package speed.
[0062]
In a refinement of the invention, the target stroke counter is increased by a defined value in one pulse. For example, a tacho sensor generates a specific number of pulses per package rotation in one package. Each pulse of the tacho sensor can correspond to a fully defined stroke distance for the selected winding ratio. The target stroke counter is incremented at each tacho pulse by a value determined by the current winding ratio.
[0063]
In order to monitor the maintenance of the winding ratio, the value of the target stroke counter is supplied to the regulator together with the value of the actual stroke counter of the drive. In order to ensure the monitoring of the maintenance of the winding ratio, the drive or servo drive of the traversing device also has the same counter or the same counter. This actual stroke counter counts the number of strokes performed with the same resolution. The actual and target stroke counters serve as control and guidance variables for the regulator. As the operation amount of the regulator, the determined average supply speed is determined, or a correction value of the average supply speed is determined.
[0064]
In order to maintain a specified winding ratio at a predetermined package rotation speed, the traverse device or the driving device of the yarn guide is controlled by the average feeding speed and the stroke length (length of one stroke). . As a result, the yarn guide is accelerated or decelerated, so that the package is provided with (step) precision winding.
[0065]
Furthermore, in an advantageous refinement of the method according to the invention, the adjustment of the stroke width is achieved in order to realize an end ridge or an end swelling in the stroke and / or in particular to form a bunch outside the stroke. In this case, the speed of the thread guide can be braked to zero.
[0066]
The machine for winding the yarn for carrying out the presented method comprises an operating data input, a package tachometer sensor, a target stroke counter, an actual stroke counter provided in the drive of the traversing device, and And a calculation / control unit for determining an acceleration value when a predetermined winding speed is maintained at a specified package rotation speed.
[0067]
Furthermore, the invention makes it possible to carry out other winding forms besides (step) precision winding. In order to avoid ribbon formation, for example, the average feed rate can be varied continuously as a function of time (woopling in the case of wild winding) or discontinuously jumped (without ribbon) as a function of package diameter. Can be changed by Also, a combination of both methods is possible.
[0068]
In the case of wild winding, the accuracy requirements imposed on the average feed rate are significantly smaller than in the case of (step) precision winding. In this case, the control circuit can be eliminated. In the other method (without ribbon), it is important to detect the current winding or package diameter very accurately and react with sufficient accuracy by the average feed rate.
[0069]
In another aspect of the invention, the means for varying the stroke width may position the yarn within the stroke (eg, to form an end wrap) or alternatively, off-stroke (eg, to form a bunch). Also used for positioning. This basic mechanism is already known from EP 311827. The major difference is that the yarn is caught when pulled from the yarn guide, moves to the positioning position, is caught by the winding tube, forms a defined bunch, and is moved into the stroke range. The thread guide then also acts as a traversing thread guide. If it is desired to initiate a package change, i.e. when the desired package diameter, the desired running length or the running time has been wound, the traversing thread guide is moved to a defined position in the stroke in order to form an end winding. Will be stopped. Thereafter, the thread guide is again brought into the positioning position, so that the thread can be captured in a new tube. Thus, the yarn never leaves the yarn guide. Thus, the positioning time can be reduced to a minimum or adjusted to a reproducible defined value. In particular, this system is suitable for mandrel shifting packages. In this mandrel shift, the position of the end winding is matched with the position of the positioning position before capture. This is because, in that case, thread winding can be reduced to a minimum.
[0070]
In the following, embodiments of the present invention will be described in detail with reference to the drawings.
[0071]
In describing the embodiments, a general description will first be given with reference to FIGS. 10 to 16, and then a detailed description will be given with reference to FIGS.
[0072]
FIG. 10 shows a cross-sectional view of the winder 1. In the winding machine 1, the yarn F is wound by the traverse device 2 to form a package 3. The package 3 is formed on a winding tube 4. This tube 4 is received by a package mandrel 14.
[0073]
Driving of the package 3 is performed via a driving device (not shown) of the package mandrel 14 or by a friction roller or a contact roller 5. The friction roller or contact roller 5 (when the package mandrel 14 is driven) also has the function of pulling the yarn from the oscillating yarn guide 7 (referred to as "the pointer 7"). The pointer 7 is disposed between the guide ruler 6 and the friction roller or the tacho roller 5, or is disposed before the guide ruler 6 and the friction roller or the tacho roller 5. A detailed description of the guidelines is given in Swiss patent application No. 1119/99 filed on June 16, 1999 by the same applicant.
[0074]
The package 3 with the winding tube 4 is shown in a working position, in which case the empty winding tube 4.1, which was in the working position at the start of the package formation, is additionally replaced by a friction roller or tacho roller 5. , And at 4.2 the empty tube is shown in the standby position. The two stand-by positions shown are the starting positions for the rotary movement indicated by the dash-dot line in the so-called turret drive, in which the empty winding tube is moved towards the friction roller by the turret drive. Alternatively, the full package 3.1 is moved in a direction away from the friction roller towards the removal position.
[0075]
The pointer 7 has an end that is larger in shape and heavier than the other parts in shape and weight, and this end cannot rotate relative to the motor shaft 9 of the motor 8. Fixed to. In this case, the motor 8 is controlled by the control device 12 according to a stroke program for forming a package. The input of such a program to the control device is performed via the input device 13.
[0076]
In order to control the movement of the hands 7, a movement monitoring device 16 is provided. The motion monitoring device 16 comprises a signal transmitter 10 which is rigidly connected to the motor shaft 9 and a signal receiver 11 which is arranged separately from the signal transmitter 10 and which receives the signal. The transmitted signal is transmitted to the control device 12. The pointer drive can be configured as a servo drive. The servo drive has an encoder, which generates at least one pulse train during operation. The encoder can for example be equipped with two pulse tracks. In this case, each track is formed to generate 1024 pulses per revolution.
[0077]
FIG. 11 shows a view of the winding machine 1 as viewed in the viewing direction I. In this case, the input device 13 and the control device 12 are not shown in order to simplify the drawing. The first thing to be shown by FIG. 11 is that the needle 7 can not only be reciprocated within the stroke H, but the thread F can be stopped at the position C by the needle 7 on the one hand for a package change. Thus, a "final winding thick portion" is formed in the completed package.
[0078]
In addition, the hands 7 can be stopped (or moved at a reduced speed) at positions A and B outside the stroke H for thread retraction at the start of the winding process or when changing the package. In this case, at position A, the yarn is held in a position such that the yarn can be captured by the catch knife or the notch of the next winding tube, and at position B, the yarn can be bunched around the winding tube end. Subsequently, the thread F is guided by the pointer 7 into the stroke H, and is reciprocated in this stroke H by traversing movement.
[0079]
As can be seen, the pointer in this embodiment can not only be decelerated or accelerated without external aids at the end of the stroke, but also very quickly to the position where the pointer stops for a short time. Which is then again moved at a defined speed to another functional area or accelerated.
[0080]
FIG. 12 additionally shows the speed course of the pointer 7. The speed profile shown is different depending on the type of package formation, and thus the speed profile shown does not limit the possible speed profile of the pointer 7. FIG. 13 shows a variant embodiment of the guide ruler 6, in which the guide rule 6.3 on the other hand has a straightened guide compared to the guide rule 6 shown in FIGS. It has a track 17.1, on the other hand the thread F is guided in an extended guide slit 15. 1 provided in the thread guide 7. In this case, it is sufficiently possible to set another guide ruler shape according to the package formation and traversing speed progress, and the arrangement of the friction roller or the tacho roller 5 relative to the pointer 7 and the guide ruler 6. .
[0081]
Next, the general meaning of the traversing motion for forming a package will be described with reference to the schematic diagram shown in FIG. However, in this case, it does not address the problems that arise with practical application. Such a problem and the solution according to the present invention will be described later in detail with reference to another drawing.
[0082]
FIG. 14 diagrammatically shows the reversal points U1, U2 of the defined traversing movement of the thread guide 15 with the pivot axis D of the pointer 7 and the stroke length B. In order to produce a traversing movement, the longitudinal axis ZL of the pointer 7 must be turned by an angle γ about the turning axis D. For an optimized formation of the package, it is desirable for the control device to be able to set a variable turning angle as a reversal point. This movement can be programmed into the controller 12. In this case, the reversal point is defined, for example, with respect to the reference line R. The evaluation device provided in the sensor 10 (FIG. 10) or the control device 12 is in principle designed such that the motor 8 reverses the rotation by means of the control device by comparison with a defined reversal point (U1; U2). Can be done. The actual position of the pointer 7 is always known via the movement monitoring device 16 and can be compared by the control device 12 to a defined reversal point. Thereby, inversion can be performed at a desired position each time.
[0083]
The inversion points U1, U2 determine the position of the corresponding edge of the package. For simplicity, one can start with a cylindrical package. The position of the package edge in the axial direction with respect to the winding tube is important in two respects:
-First, the position of the package edge must correspond to the defined stroke width (axial length) of the package, and
-Secondly, the position once determined must be maintained or must follow a defined change pattern (ie the position of the package edge must not "wander" uncontrolled).
[0084]
As described below, the inversion points U1 and U2 can be changed (within a specified range) via the input device 13. This is schematically illustrated in FIG. 14 using dashed lines. If, for example, the linear speed of the thread guide must be kept constant, the turning speed of the arm must be changed in any case. In order to be able to change the stroke during the package formation, for example, a predetermined package formation cycle can also be input. Associated with the package forming cycle is, for example, the definition of the associated yarn catching position, as already described. The input can be made, for example, for predefined winding parameters. The operator is first required, for example by the controller 12, to enter the required parameters, and can then start the winding cycle.
[0085]
FIG. 15 schematically shows a part of a package mandrel 50 having a rotation axis (longitudinal axis) DA and a winding tube 51. The winding tube 51 is held at a predetermined location in the longitudinal direction of the package mandrel 50 by suitable means (not shown). A package (not shown) can be formed in this winding tube within a specified maximum stroke width HB1. This maximum stroke width HB1 is defined for the “reference data” RD. This reference data is located at the stroke center in this embodiment (although this is not very important). Advantageously, the reference line R in FIG. 14 is modified to match the reference data RD around the winder (FIG. 15). However, both criteria must in any case have a certain predetermined correlation. Such interrelationships must be taken into account when programming the traverse control.
[0086]
When the package is a cylindrical package, the package edge is ideally located at a boundary that partitions a predetermined stroke width HB1. Nevertheless, it is advantageous that winding does not always take place to these outer boundaries. This is because the danger of material accumulation in the edge area of the package is increased. Therefore, in the case of forming a cylindrical package, it is known that the stroke width is periodically changed during the winding process (periodic expansion and contraction of the stroke). This is schematically illustrated in FIG. 15 as “stroke width HB2”, but of course, actual stroke expansion and contraction requires complicated mechanical operations. Therefore, according to the present invention, the stroke is periodically expanded and contracted by the movement of the pointer controlled by the prescribed control program. However, the use of the arrangement shown in FIGS. 10 to 14 also allows the programming of the winder to realize a package having another (non-cylindrical) structure (for example, a cone-shaped package or a biconical package). To This again requires a control program that defines a variable stroke width.
[0087]
Selection and maintenance of winding ratio
The winding ratio is generally represented by the following equation.
[0088]
(Equation 1)

[0089]
Or, in other words, it is the bobbin rotation number for each reciprocating stroke.
[0090]
From this formula, the traditional relationship between the corresponding speed of the drive motor for traversing and the speed of the bobbin is derived (see, for example, US Pat. No. 4,676,441). This relationship is used to define an appropriate control program for the traverse drive. For this purpose, this traditionally derived relationship is such that the kinematic characteristics of the yarn guide over the stroke are determined by the geometry of the mechanical guide element (for example, a grooved roller or a vane of a vane traversing device). Is sufficient in relation to the system given by However, this traditionally derived relationship is no longer sufficient for the case where the thread guide is not merely "mechanically" but operated "electrically" with a higher flexibility.
[0091]
The number of reciprocating strokes n (DH) is represented by the following equation.
[0092]
(Equation 2)

[0093]
In this equation, V (CH) is the average speed of the yarn guide over a single stroke, and HB is the corresponding stroke width.
[0094]
further,
[0095]
(Equation 3)

[0096]
In this equation, V (SP) is the peripheral speed of the bobbin, and D (SP) is the instantaneous bobbin diameter.
[0097]
The following relationship is obtained from the above equation.
[0098]
(Equation 4)

[0099]
as well as
[0100]
(Equation 5)

[0101]
The following two conclusions can be obtained from the above equation.
[0102]
(I) Appropriate winding for each bobbin diameter to be obtained, in order to maintain a predetermined bandwidth of the weaving angle (winding angle) based on the relationship between V (SP) and V (CH) It is not only important to select the ratio, but also the adjusted stroke width needs to be considered. In other words, when programming the variable stroke width, the choice of winding ratio should be adjusted to the bobbin diameter and also to the stroke width in order to be able to maintain the bandwidth of the traversing angle given by the end user. Also need to be done in connection with.
[0103]
(Ii) For an effectively selected winding ratio WV and an effectively adjusted stroke width HB, a suitable average thread guide speed V (CH) is derived from the bobbin speed.
[0104]
From the above relationship, important control parameters are derived to obtain a desired package shape. Considering this perception offers very important advantages. However, even taking into account this recognition, the new possibilities of the evolving drive technology cannot be immediately or optimally or fully exploited. In order to realize this, it is necessary to control the movement of the yarn guide during the stroke. This is suggested in various forms in the prior art, but does not show how to control the entire system.
[0105]
Control system configuration
To enable an overview of the different parts of the system, three "functions" of the system are described here. These functions can be connected to each other by software, but it is advantageous to separate them from each other during programming and to distinguish them. The three functions are as follows:
[0106]
1. First winding technical function:
This function has a calculation routine described using FIGS. 10 to 15 and Equations 1 to 5. The "product" of this function is, on the one hand, the choice of an appropriate winding ratio to be able to maintain the bandwidth for the twill angle β, while maintaining the selected winding ratio This is the calculation of an appropriate average yarn guide speed for performing the operation. This product, on the one hand, can be programmed with theoretical considerations as follows. For example
[0107]
(Equation 6)

[0108]
(Equation 7)

[0109]
2. Second winding technical function:
This function defines the movement characteristics of the yarn guide and the yarn during the stroke and at the time of the stroke switching. Appropriate characteristics must not be calculated by theoretical considerations, but must be empirically calculated by an appropriate method. Nevertheless, it is possible to define certain "corners" of the "profile" during the stroke, which is then supplemented with empirical results based on various data for individual cases. . In this case, it is important to maintain the criterion calculated by the first function. This criterion is used as a critical parameter for embodying the motion characteristics. This is particularly suitable for (but not limited to) maintaining an average yarn guide speed. It is therefore advantageous to define the desired movement characteristics as a (mathematical) function of the average yarn guide speed.
[0110]
3. Motor control function:
This function requires converting the results of the first and second functions into a control signal. This control signal causes a corresponding movement of the rollers by the traverse drive motor.
[0111]
In consideration of recent driving techniques, it is sufficient to define the movement characteristics of the thread guide by an acceleration value or a speed value at a predetermined position during a stroke. In this way, the expert in drive technology can define the corresponding control signals for the selected motor type. For example, in this connection, the description of EP 435 622 and / or EP 901979 and / or WO 98/42606 can be considered. This third function is not described in detail below. This is because this third function represents an inherent special problem associated with the drive technology rather than with the winding technology.
[0112]
The three functions are shown schematically in FIG. Box F1 shows a calculation routine for transmitting a guide signal corresponding to the required average yarn guide speed. Box F2 shows a calculation routine that defines the motion characteristics of the yarn guide (or motor rotor) using the average yarn guide speed and a predetermined profile.
[0113]
The box F3 has a drive motor with a defined kinematic characteristic selected so that the pointer Z can be vibrated in an optimal manner over the adjusted stroke width (or by a corresponding stroke rotation angle). FIG. 4 shows a calculation routine for converting into an appropriate control signal for the above.
[0114]
However, it is clear to the expert that controlling the original movement of the pointer Z according to the desired "pattern" is actually very difficult. Therefore, in order to ensure that the critical parameters are maintained, monitoring is carried out in an advantageous manner so that the desired control parameters can be tuned by means of at least one feedback in order to force as much as possible the desired result. It is advisable (if this is not obtained by the control signal).
[0115]
A first feedback of this type is indicated by a sensor S for the position of the pointer Z (or its drive AM), a comparator VG1 and a setpoint transmitter SW1 for the pointer position. In this case, a system correction is derived from the comparator. The second feedback is indicated by the comparator VG2 and the target value transmitter SW2.
[0116]
According to the invention, the monitoring takes place within a first function. The correction can be carried out in the form of a correction of the calculated average thread guide speed (by VG1) and / or the target value for the stroke width (by VG2). The configuration of the device that enables such monitoring is described below with reference to FIGS. In this case, the problem relating to the maintenance of the predetermined reversal point for the yarn guide will first be described. At the high number of reciprocating strokes required at high speed, it is not taken into account that the thread guide immediately stops first at the theoretical reversal point (eg U1 or U2, FIG. 14) and then moves in the reversal direction. The reversal of the yarn guide movement always involves a certain error. It is therefore important to consider this fact to maintain its significance within the acceptable limits for winding. In this case, such limits are defined by the user of the machine (based on the specific quality requirements).
[0117]
Suitable embodiment
FIG. 1 shows the possibility of forming a deviation of the end point of the yarn guide at one reversal point during reversal. The encoder 110 of the drive, not shown, supplies pulses to the evaluation device, which is evaluated, for example, according to a feedback method. The evaluation device 112 supplies a target reversal point, which is supplied as a real stroke reversal point I to a memory, preferably to a flash memory 113. This actual value I is further supplied to the computer 114. A computer 114 designed as a control computer has a traverse speed V of the yarn guide._CHThe exact stroke reversal point used as the target value is also stored. By subtracting the actual value I from the target value S, the difference, the tracking error of the thread guide and the pulling error of the thread resulting therefrom are calculated._CHIs stored in the tracking table 115 of the computer 114. When the number of reciprocating strokes jumps, the expected following error of the yarn guide and the yarn is calculated by interpolation from Table 115, whereby a corresponding control command which takes into account the new reversal point of the yarn guide is supplied to the control unit. Is done.
[0118]
FIG. 2 shows a variant embodiment to FIG. 1, comprising an encoder 111, which supplies its signal to an evaluation device 112, which evaluates the actual stroke reversal point from the result. Supply. In this case, the control computer 114 supplies the target value of the inversion to the flash memory 113. The calculation of the deviation of the actual value I from the target value S takes place outside the computer 114, in which case the deviation is supplied to the computer 114 and the target value transmitter 116 after further calculation. In the tracking table 115, the deviation is stored in relation to the traverse speed VCH. After obtaining the deviation value, the setpoint transmitter 116 supplies a corresponding control command to the speed regulator 117 of the drive.
[0119]
In the possibility shown in FIG. 2, a correction of the traverse stroke is made after each stroke. This allows the system to adjust the tracking error that has occurred significantly faster than in the solution shown in FIG.
[0120]
Since the calculation of the deviation between the target value and the actual value is generally performed for the left and right sides of the traverse, the target values for the left and right winding sides are simultaneously present in the computer 14 or the memory 13. ing.
[0121]
FIG. 3 shows an average moving speed or an average angular speed ω of the needle as the yarn guide, which is calculated to obtain a predetermined winding ratio at a predetermined winding rotation speed._mIs shown. The input device 130 is used for inputting customer-specific operation data BD, for example, a twill winding angle, a bandwidth, a stroke width, and the like. Furthermore, important and preferably invariant configuration data KD are provided for the control of the winding. The configuration data KD is used for calculating adjustment data of the traverse SD. In addition, a fraction table BT in which a particularly good winding ratio is maintained is prepared.
[0122]
From the operating data BD, the fraction table BT and the configuration data KD, a winding ratio table WV is obtained together with the actually calculated bobbin diameter SPD. In the winding ratio table WV, a data set including a bobbin diameter, a stroke jump instruction, and a stroke width or a stroke length is formed. This introduces a stroke jump at a given bobbin diameter. The leap itself is limited by the permissible traversing angle change.
[0123]
In order to calculate the actual bobbin diameter, on the one hand, the adjustment data of the traverse SD is taken into account. On the other hand, for this, the contact roller f_TWOf the bobbin f_SPAre also used.
[0124]
At the same time, the frequency pulse f_SPIs the target value counter H_SOLLSupplied to To calculate the target value position during the stroke, the winding ratio table WV stores the value for the bobbin diameter in the stroke counter H._SOLLTo supply.
[0125]
The drive of the twill winding device has a stroke counter, which records the actual position of the thread guide. From the comparison between the actual position of the yarn guide and the target position, an adjustment value and a guide value are obtained in the adjuster 131. The adjustment value of the adjuster 131 is an average winding speed or angular speed ω._mIt is.
[0126]
In order to maintain the winding ratio WV at a predetermined bobbin rotation speed, it is advantageous to monitor the winding ratio WV with high resolution. For this purpose, the tachometer (rotation speed sensor) outputs a predetermined number of pulses f for each bobbin rotation speed._SPSupply. Thus, a stroke path that can be accurately calculated for a predetermined winding ratio is arranged in correspondence with the pulse of the octopus (rotation speed).
[0127]
FIG. 4 shows a schematic diagram for calculating the acceleration values for the servo device of the traversing device. For this purpose, important further operating data BD, for example for periodic stroke increments (Hubatmung), are preferably manually preselected by the user. The values that are important for the periodic increase and decrease of the stroke are, in particular, the stroke period, the stroke distribution and the stroke amplitude (see below).
[0128]
From the operation data BD described above, adjustment data used for calculating the stroke width HB is defined. Further adjustment data of the traverse can be obtained from the configuration data KD for the control, in particular from the profile table PT of the pointer length and the speed profile during one stroke. This further adjustment data is used further for the acceleration value of the drive AS. A winding ratio table WV is defined from the operation data BD, the configuration data KD, and the fraction table BT. This winding ratio table WV also includes the extension of the stroke length as a function of the bobbin diameter. The stroke cycle counter HP is equal to the actual value counter H._istOr pulse.
[0129]
The stroke cycle counter HP, the stroke width corresponding to the bobbin diameter D (SP) obtained from the winding ratio table WV, and the course of the periodic stroke increase / decrease (as a function of the number of strokes) specified by the operation data BD. Thus, the actual stroke width target value HB is defined. Stroke width target value HB, winding ratio table WV, profile table PT, average winding speed or angular speed ω_mThus, the acceleration value AS of the servo drive device is defined. The stroke period HP counter obtains data from the stroke counter which is defeated by the signal or value of the actual stroke counter of the servomotor. From the traverse adjustment data, the calculated stroke width and the similarly calculated average winding speed, an acceleration table AS for the servo drive of the traverse device is calculated.
[0130]
Overall, the calculation of the acceleration table AS makes it possible to very accurately wind the yarn on the rotating bobbin while maintaining the winding ratio and the bobbin speed.
[0131]
FIG. 5 shows an example for parameterizing a periodic stroke increase / decrease. Periodic stroke increments and decrements cause fluctuations in the stroke width during the entire winding process.
[0132]
FIG. 5 shows the temporal increase and decrease of a nominal stroke having a stroke amplitude A. The stroke amplitude A can be selected at 1 ° of the nominal stroke HB. The stroke distribution V provides the ratio of the increase to the decrease in amplitude, for example, in 周期 of the period. The stroke cycle P indicates the time length of the adjustment cycle, and can be expressed in traverse stroke units. In another variation of the adjustment, the period P is also related to the number of reciprocating strokes (nDH) or the bobbin diameter or the winding time.
[0133]
As mentioned above, at least two different combinations of amplitude adjustments can be used alternately (FIG. 7). This makes it possible to temporarily keep the stroke width constant (FIG. 8). In this case, the amplitude A₂And / or stroke distribution V₂Is equal to zero. FIG. 6 shows the speed profile during one stroke. The velocity profile is determined by the support point P₀~ P₈End stopper E₁And E₂The relative speed of the traversing device or the yarn guide is set. End stopper E₁And E₂Indicates a relative stroke width adapted to the bobbin according to the actual stroke width. Similarly, the support point P₀To P₈Is expressed as a relative velocity value related to the average displacement velocity. From the predetermined speed profile and the actual stroke width, the control computer calculates the speed profile for the servo drive, whereby the winding ratio and the bobbin speed are maintained almost exactly.
[0134]
FIG. 9 shows the supporting point D₁And the stroke width HB belonging to it₁3 shows a change in the stroke width HB based on the bobbin diameter defined via the rotation speed in relation to the rotation speed. For example, four support points D₀To D₃And HB₀~ HB₃It is shown. Of course, the number of reciprocating strokes n_DHAlternatively, a change in the stroke width related to the winding time t can be performed.
[0135]
The parameters for periodic stroke increments and decrements and stroke width changes (eg, FIG. 7) can be provided either in a predefined menu or by an operator. By preparing the bobbin manufacturing method in this way, the operation at the time of winding the yarn is reduced as a whole.
[0136]
The device is advantageously selected in such a way that the stroke width (HB) of the bobbin to be obtained has to be given in advance by the user (input to the control device). With such a predetermined stroke width, the control device (preferably a computer) determines the set point (RR) for the end point of the reversal of the thread guide at the right bobbin edge and the left bobbin. A target value (LR) for the end point of the yarn guide reversal at the edge is calculated and defined for the winding process. This target position forms a defined reference point (initial point) for the winding of the package as well as a first target value (target inversion value) for the drive control of the traversing winding. The end point of the reversal of the thread guide at the left (right) bobbin edge therefore corresponds to the corresponding target reversal point. As already mentioned above, it is possible that the thread guide is moved by the control device so that it is stopped exactly at any of the target reversal points defined by the control device and starts its "reversing movement". That is not. In other words, it must be taken into account that the actual end point of the yarn guiding movement is always offset from the target reversal point defined by the control device, ie that an error occurs for this target reversal point. The control device can therefore take into account that the sum of the measured error and the target reversal point defined by the control device each represents a valid target position for the end point of the reversal. The effective target position for the end point of the reversal itself is variable in relation to the bobbin shape to be obtained throughout the winding process (periodic increase and decrease of the stroke, etc.). The respective error with respect to the instantaneously obtained target inversion point has no direct effect, but for this purpose the controller considers the effective value of the error in accordance with the target inversion point specified by this controller. can do. However, despite the fact that the target reversal point can be freely defined by the control device, the target position for the end point of the reversal is variable only according to the input data of the winding process.
[Brief description of the drawings]
FIG.
It is the schematic which shows the apparatus for calculating the deviation at the time of inversion of the yarn guide at the inversion point.
FIG. 2
FIG. 3 is a diagram showing a modified example of the configuration shown in FIG.
FIG. 3
It is a schematic diagram for calculating an average supply speed.
FIG. 4
FIG. 4 is a schematic diagram for calculating acceleration of a servo drive device.
FIG. 5
FIG. 4 is a diagram illustrating an example for parameterizing the periodic expansion and contraction of a stroke.
FIG. 6
FIG. 3 is a diagram showing a speed profile.
FIG. 7
FIG. 4 is a schematic diagram showing an example of a combined parameterization of a cyclic expansion and contraction of a stroke.
FIG. 8
FIG. 4 is a schematic diagram showing another example of a combined parameterization of a cyclic expansion and contraction of a stroke.
FIG. 9
FIG. 3 is a schematic diagram showing an example of parameterizing a continuous stroke change.
FIG. 10
FIG. 2 is a copy of FIG. 1 of WO 99/65810.
FIG. 11
FIG. 2 is a copy of FIG. 2 of WO 99/65810.
FIG.
Figure 4 is a copy of Figure 3 of WO 99/65810.
FIG. 13
5 is a copy of FIG. 4 of WO 99/65810.
FIG. 14
6 is a copy of FIG. 5 of WO 99/65810.
FIG.
It is the schematic of "around a winder" for traversing.
FIG.
1 is a schematic diagram of a control system according to the present invention.

Claims (33)

A method of operating a yarn winding machine, particularly a winder, wherein a yarn guide of a traversing device guides a yarn back and forth between two reversal points in one traversing stroke alternately in a direction transverse to the yarn drawing direction. In the form of supplying to a rotating bobbin,
One of the reversal points detects the reversal end point of the yarn guide, and the yarn is wound on a bobbin, which is corrected, especially shortened or extended, in the next stroke in relation to the position of the end point of the traversing stroke. Way to take. The method of claim 1, wherein the traversing stroke is modified in relation to a difference between the end points of the reversal points. 3. The method according to claim 1, wherein the difference between the end points of the reversal points over a plurality of steps is averaged. 4. The method according to claim 1, wherein the traversing stroke is modified in any stroke. 5. The method as claimed in claim 1, wherein the traversing process is modified in a subsequent process. The method according to any one of claims 1 to 5, wherein an error is calculated from a difference between end points of the inversion points. 7. The method as claimed in claim 1, wherein the errors are stored in a table, in particular as a function of the traversing speed. If the number of round trips jumps, the error to be expected is interpolated from the table and subtracted from the stroke width or added to the stroke width. A method according to any one of claims 1 to 7, which compensates. 9. The method according to claim 1, wherein the stroke width is varied during the entire winding operation. A yarn winding machine, in particular a winder, provided with a traverse device, wherein the yarn guide of the traverse device alternately turns the yarn in a direction transverse to the yarn pull-out direction at two reversal points within one traverse stroke. Between the traverse device and the traverse device has a driving device that reciprocates,
In particular, in order to carry out the method according to any one of claims 1 to 9, a detecting device for detecting the end point of the yarn guide when the stroke is reversed, and a traversing stroke in relation to the position of the end point. And a control device for correcting, in particular for shortening or lengthening, the yarn winding machine. A method of operating a yarn winding machine, particularly a winder, wherein a yarn guide of a traversing device guides a yarn back and forth between two reversal points in one traversing stroke alternately in a direction transverse to the yarn drawing direction. In the form of supplying to a rotating bobbin,
The driving device for the yarn guide or the traverse device is controlled in relation to the predetermined winding ratio and the bobbin rotation speed such that the winding ratio is maintained at the bobbin rotation speed or a change in the bobbin rotation speed. The operation method of the yarn winding machine. The method according to claim 11, wherein the stroke width and / or the winding ratio is changed. The yarn supply is controlled by a cyclic increase or decrease of the stroke and / or by a particularly continuous change of the stroke during the entire winding process, in particular as a function of the bobbin diameter and / or the number of strokes and / or the time and / or the stroke width. 13. The method according to claim 1, wherein the method is adjusted or modified. 14. The method according to claim 1, wherein the speed profile of the yarn guide between the reversal points of the stroke is predefined. 15. The method as claimed in claim 1, wherein the speed profile is configured independently of the stroke width during the entire winding process and / or is related to an average feed speed. The method according to any one of claims 1 to 15, wherein the average feeding speed is calculated based on a stroke width, a winding ratio, and a bobbin rotation speed. 17. The method according to claim 1, wherein a predetermined stroke distance is associated with a pulse of a target stroke counter for a predefined winding ratio and a predefined bobbin speed. 18. The method according to claim 1, wherein the target stroke counter is increased by a specified value in a predetermined pulse. 19. The method as claimed in claim 1, wherein the value of the target stroke counter of the drive is supplied to the controller together with the value of the actual stroke counter. 20. The method according to claim 1, wherein the controller calculates an average correction value of the supply speed from the values of the target stroke counter and the actual stroke counter. Adjusting the stroke width to achieve end ridge formation within the stroke and / or especially to form a bunch outside the stroke, wherein the speed of the thread guide can be reduced to zero. 21. The method according to any one of items 1 to 20. A yarn winding machine, in particular a winder, provided with a traverse device, wherein the yarn guide of the traverse device alternately turns the yarn in a direction transverse to the yarn pull-out direction at two reversal points within one traverse stroke. Between the traverse device and the traverse device has a driving device that reciprocates,
In particular, in order to carry out the method according to any one of claims 11 to 21, a target stroke counter and an actual stroke counter in an operating data input device, a bobbin tacho sensor, a driving device of a traverse device, and a predefined stroke counter. And a calculation and control unit for calculating an acceleration value when maintaining a predetermined winding ratio at a specific stroke width and a specified bobbin rotation speed. A winding unit comprising at least one winding mandrel and a traversing device, wherein the traversing device is provided with a drive device, in particular a swivel drive device, which can be controlled so that a stroke width is variable over the entire winding process. In the form of
The traversing drive is controlled in relation to the bobbin rotation speed and the predefinable winding ratio, and the effective winding ratio is controlled by the control device from a plurality of possible winding ratios to the parameters affecting the twill winding angle. A winding unit characterized in that the winding unit is selected in connection with. A winding unit comprising at least one winding mandrel and a traversing device, wherein the traversing device is provided with a drive device, in particular a swivel drive device, which can be controlled so that a stroke width is variable over the entire winding process. In the form of
The travel width to be maintained by the traversing device is predefined, in which case the travel width to be predefined is predefined in the surrounding environment defined on the basis of the winding unit, in particular for the winding mandrel. A winding unit, which is preferably defined for reference data having a defined orientation, in particular for the center of travel. 25. The winding as claimed in claim 24, wherein the target reversal point is defined in relation to the predefined stroke width, and the target reversal point is advantageously variable to help maintain the predefined stroke width. unit. A winding unit comprising at least one winding mandrel and a traversing device, wherein the traversing device is provided with a drive device, in particular a swivel drive device, which can be controlled so that a stroke width is variable over the entire winding process. In the form of
A winding unit, wherein an average speed of the yarn guide over one stroke is derived from a bobbin rotation speed based on an effective winding ratio and an effective stroke width. A winding unit comprising at least one winding mandrel and a traversing device, wherein the traversing device is provided with a drive device, in particular a swivel drive device, which can be controlled so that a stroke width is variable over the entire winding process. In the form of
A winding unit characterized in that the movement of the yarn guide over one stroke is controlled based on a predetermined movement characteristic (profile), and that the average speed of the yarn guide predetermined by a control device is maintained. . 28. The winding unit according to claim 27, wherein the motion characteristic defines an acceleration value and / or a speed value that is maintained over a stroke at a predefined position. 29. The winding unit according to claim 28, wherein the optimum kinematic characteristics are determined empirically, and vary in particular over the entire winding process (i.e. from the beginning to the end of the formation of a particular package). The motor is provided with a control for rotating said rotor between reversal points having a rotation angle interval of less than 360 °, in particular less than 180 °, wherein the movement of the reciprocating thread guide is defined by the movement of the motor rotor. Item 30. The winding unit according to any one of items 23 to 29. In a winder provided with a traverse device having a yarn guide reciprocated within one traverse stroke by a controllable motor,
A stroke width must be entered, from which at least one initial target value for the yarn guide reversal end point is derived, the actual value for the yarn guide reversal end point is determined, and the actual value for the yarn guide reversal end point is determined. In connection with the calculated difference between the value and the first target value for the thread guide reversal end point, a modified target value for the thread guide reversal end point is derived to obtain the actual value and the first target value. And a difference between the winder and the winder. 32. The winder according to claim 31, wherein the first target value is a first value of a target value range corresponding to a progress of a stroke width over the entire winding process. 32. The winder according to claim 31, wherein the actual value for the inversion end point of the thread guide is detected by a detection device mounted on the motor shaft.

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