JPH01112407A - Circular motion error displaying system in numerical controller - Google Patents

Circular motion error displaying system in numerical controller

Info

Publication number
JPH01112407A
JPH01112407A JP27153187A JP27153187A JPH01112407A JP H01112407 A JPH01112407 A JP H01112407A JP 27153187 A JP27153187 A JP 27153187A JP 27153187 A JP27153187 A JP 27153187A JP H01112407 A JPH01112407 A JP H01112407A
Authority
JP
Japan
Prior art keywords
data
circular motion
motion error
circular
machine position
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP27153187A
Other languages
Japanese (ja)
Other versions
JPH07122821B2 (en
Inventor
Takahiko Kitade
北出 隆彦
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Okuma Corp
Original Assignee
Okuma Machinery Works Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Okuma Machinery Works Ltd filed Critical Okuma Machinery Works Ltd
Priority to JP62271531A priority Critical patent/JPH07122821B2/en
Publication of JPH01112407A publication Critical patent/JPH01112407A/en
Publication of JPH07122821B2 publication Critical patent/JPH07122821B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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  • Numerical Control (AREA)

Abstract

PURPOSE:To display respective obtained circular motion error and to make correct the accuracy of a machine tool in a short time by detecting the machine position data of respective feed shafts, function-generating the command interpolation data by a part program and obtaining respective circular motion errors of the command interpolation data based on the circular data stored beforehand. CONSTITUTION:By synchronizing to a timing signal ST from a data latch timing generating part 1 of an NC device, a data latch 5 respectively reads machine position data DX-DZ of respective shafts from X axis, Y axis and Z axis position detectors 2-4 and stored them into a machine position data storing part 6. A function generating part 7 generates command interpolation data DS by a part program and stores them into a command interpolation data storing part 8. Based on circular data DC stored into a circular data storing part 9 beforehand, a circular motion error arithmetic part 10 obtains circular motion errors EP and ES between machine position data DMP from storing parts 6 and 8 and command interpolation data DMS, the data DC are changed by the errors EP and ES and they are respectively graphic-displayed to a CRT 12.

Description

【発明の詳細な説明】 (発明の技術分野) 本発明は、数値制御(以下、NGという)工作機械の性
能評価の1つである真円運動誤差をNC装置で簡易に得
て表示することができる真円運動誤差表示方式に関する
[Detailed Description of the Invention] (Technical Field of the Invention) The present invention provides a method for easily obtaining and displaying a circular motion error using an NC device, which is one of the performance evaluations of a numerically controlled (hereinafter referred to as NG) machine tool. This paper relates to a method for displaying errors in perfect circular motion.

(技術的背景と解決すべき問題点) マシニングセンタ等のNC工作機械の性能を判断するに
は、送り軸を真円運動させたときの真円運動誤差の定量
的評価がある。この真円運動誤差の生じる原因は機械系
によるものとサーボ系によるものとが有り、NC工作機
械の性能を向上させるためにも真円運動誤差を定量的に
評価する必要がある。そこで、真円運動誤差を定量的に
得るにはNC工作機械に計測機を取付けて計測する方法
があるが、計測機が精密機器であるため取扱いが困難で
あり、かつ高価格であるという欠点があった。また、N
C工作機械で実際に真円加工を行ない、その加工形状を
計測する方法があるが、真円運動誤差に加工方法による
誤差が含まれることがあるため評価が不正確になり、ま
た加工に手間が掛かる等の問題があった。
(Technical background and problems to be solved) In order to judge the performance of NC machine tools such as machining centers, there is a quantitative evaluation of the circular motion error when the feed axis is moved in a perfect circle. The cause of this circular motion error is due to the mechanical system or the servo system, and it is necessary to quantitatively evaluate the circular motion error in order to improve the performance of the NC machine tool. Therefore, in order to quantitatively obtain the circular motion error, there is a method of attaching a measuring device to the NC machine tool and measuring it, but since the measuring device is a precision device, it is difficult to handle and it is expensive. was there. Also, N
There is a method of actually machining a perfect circle with a C machine tool and measuring the machined shape, but since the circular motion error may include errors due to the machining method, the evaluation is inaccurate and the machining process is time-consuming. There were some problems, such as being overloaded.

(発明の目的) 本発明は上述のような事情からなされたものであり、本
発明の目的は、NC工作機械の定量的な真円運動誤差を
簡易に得て表示することができるNC装置における真円
運動誤差表示方式に関する。
(Object of the Invention) The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an NC device that can easily obtain and display a quantitative circular motion error of an NC machine tool. Concerning circular motion error display method.

(問題点を解決するための一手段) 本発明は、NC工作機械の性能評価の1つである真円運
動誤差をNC装置で簡易に得て表示することができる真
円運動誤差表示方式に関するものであり、本発明の上記
目的は、各送り軸の機械位置データを検出すると共にパ
ートプログラムにより指令補間データを関数発生し、予
め記憶されている真円データに基づいて前記機械位置デ
ータ及び前記指令補間データのそれぞれの真円運動誤差
を求め、求めた各真円運動誤差を表示画面上に表示する
ようにすることによって達成される。
(One Means for Solving the Problems) The present invention relates to a circular motion error display method that allows an NC device to easily obtain and display a circular motion error, which is one of the performance evaluations of NC machine tools. The above object of the present invention is to detect the machine position data of each feed axis, generate command interpolation data using a part program, and calculate the machine position data and the above data based on the perfect circle data stored in advance. This is achieved by determining each circular motion error of the command interpolation data and displaying each determined circular motion error on the display screen.

(発明の作用) 本発明のNC装置における真円運動誤差表示方式は、実
際の真円運動と真円データとから真円運動誤差を求めて
表示しているので、正確な真円運動誤差を一目で読取る
ことができるものである。
(Function of the Invention) The circular motion error display method in the NC device of the present invention calculates and displays the circular motion error from the actual circular motion and the circular data, so the accurate circular motion error is displayed. It can be read at a glance.

(発明の実施例) 第1図は、本発明の真円運動誤差表示方式を実現するN
C装置の一例を示すブロック図であり、データラッチタ
イミング発生部1からのタイミング信号STに同期して
、X軸位置検出器2.Y軸位置検出器3.Z軸位置検出
器3から各軸の機械位置データDX、DY、DZをそれ
ぞれ読出してm械位置データ記憶部6に記憶させる機械
位置データラッチ部5を有している。そして、パートプ
ログラムからの指令SPにより、指令補間データO5を
関数発生して指令補間データ記憶部8に記憶させる開数
発生部7と、真円データDCを予め記憶している真円デ
ータ記憶部9と、この真円データ記憶部9から読出した
真円データDCに基づいて、機械位置データ記憶部6か
ら読出した機械位置データDMP及び指令補間データ記
憶部8から読出した指令補間データDMSの真円運動誤
差EP及びESをそれぞれ求める真円運動誤差演算部1
0と、この真円運動誤差演算部lOから読出した各真円
運動誤差EP、ES及び真円データ記憶部9から読出し
た真円データDCのそれぞれのスケールを変更し、変更
した各データEP’ 、ES’ 、DC’をグラフィッ
ク表示装置(CRT)12に表示させる真円形状グラフ
ィック表示部11とが設けられている。
(Embodiment of the invention) FIG. 1 shows an N
2 is a block diagram showing an example of the C device, in which X-axis position detectors 2. Y-axis position detector 3. It has a machine position data latch unit 5 that reads out machine position data DX, DY, and DZ for each axis from the Z-axis position detector 3 and stores it in an m machine position data storage unit 6. Then, in response to a command SP from the part program, a numerical number generating section 7 generates command interpolation data O5 and stores it in a command interpolation data storage section 8, and a perfect circle data storage section that stores the perfect circle data DC in advance. 9, and the truth of the machine position data DMP read from the machine position data storage section 6 and the command interpolation data DMS read from the command interpolation data storage section 8 based on the perfect circle data DC read from the perfect circle data storage section 9. Perfect circular motion error calculation unit 1 for calculating circular motion errors EP and ES, respectively
0, the scales of each of the circular motion errors EP and ES read from the circular motion error calculating unit 1O and the circular data DC read from the circular data storage unit 9 are changed, and each modified data EP' , ES', and DC' are provided on a graphic display device (CRT) 12.

このような構成において、その動作を第2図のフローチ
ャートで説明すると、真円運動誤差表示を行なうか否か
を確認しくステップ51) 、真円運動誤差表示を行な
わない場合には全ての処理を終了する。一方、前記判断
ステップStにおいて、真円運動誤差表示を行なう場合
には、機械位置データラッチ部5がデータラッチタイミ
ング発生部1からのタイミング信号STに同期して各軸
の位置検出器2,3.4から機械位置データDX、DY
、DZをそれぞれ読出して機械位置データ記憶部6に記
憶させる(ステップS2)。一方、開数発生部7がパー
トプログラムからの指令SPにより指令補間データDS
を関数発生して指令補間データ記憶部8に記憶させる(
ステップ53)。そして、真円運動誤差演算部lOが、
真円データ記憶部8から真円データDCを読出しくステ
ップS4)、さらにm械位置データ記憶部6から機械位
置データDMPを読出すと共に指令補間データ記憶部9
から指令補間データDMSを読出して、それぞれのデー
タDMP及びDMSの真円運動誤差EP及びESを求め
る(ステップS5)。第3図は、XYZ直交座標系にお
けるXY平面内の機械位置データ[)MP 、真円デー
タDC及びそのデータDMPの真円運動誤差EPの関係
を示す一例であり、任意の機械位置データを点p(xp
、yp)、真円データを半径R1中心点0 (x□ 、
 yo)とすると、点Pの真円運動誤差εは次式(1)
で表わされる。
In such a configuration, the operation will be explained using the flowchart shown in Fig. 2. In step 51), it is checked whether or not to display a perfect circular motion error, and if the perfect circular motion error is not to be displayed, all processes are performed. finish. On the other hand, in the judgment step St, when displaying a true circular motion error, the machine position data latch unit 5 detects the position detectors 2 and 3 of each axis in synchronization with the timing signal ST from the data latch timing generator 1. .4 to machine position data DX, DY
, DZ are read out and stored in the machine position data storage section 6 (step S2). On the other hand, the numerical value generator 7 generates command interpolation data DS according to the command SP from the part program.
is generated as a function and stored in the command interpolation data storage unit 8 (
Step 53). Then, the circular motion error calculation unit lO,
Read out the perfect circle data DC from the perfect circle data storage section 8 (step S4), read out the machine position data DMP from the machine position data storage section 6, and read out the machine position data DMP from the command interpolation data storage section 9.
The command interpolation data DMS is read out from , and circular motion errors EP and ES of the respective data DMP and DMS are determined (step S5). Figure 3 is an example showing the relationship between machine position data [) MP in the XY plane in the XYZ orthogonal coordinate system, perfect circle data DC, and perfect circular motion error EP of the data DMP. p(xp
, yp), perfect circle data with radius R1 center point 0 (x□,
yo), the perfect circular motion error ε of point P is given by the following formula (1)
It is expressed as

ε−Xp−Xo”yp−yo−R・・・・・・(1)し
かし、この真円運動誤差εは真円と比較して極めて小さ
い値であるため(:RT12に表示させた場合に確認が
困難となる。そこで、この真円運動誤差eに任意の倍率
Aを掛けたAεを真円運動誤差とし、この真円運動誤差
へεを有する機械位置データを点Q (x 、y)とす
る。この点Q(x、y)の座標は、直線OPと真円との
交点をC(xc、yc)、真円運動誤差εのX軸成分及
びX軸成分をそれぞれε8及びε、とすると、次式(2
)で表わされる。
ε-Xp-Xo"yp-yo-R... (1) However, since this perfect circular motion error ε is an extremely small value compared to a perfect circle (: Therefore, Aε, which is obtained by multiplying this perfect circular motion error e by an arbitrary magnification A, is defined as a perfect circular motion error, and the machine position data having ε is added to this perfect circular motion error at point Q (x, y). The coordinates of this point Q (x, y) are C (xc, yc), which is the intersection of the straight line OP and the perfect circle, and ε8 and ε, which are the X-axis component and the X-axis component of the perfect circular motion error ε, respectively. Then, the following formula (2
).

そこで、上式(2)に次式(3)を代入して点Q (x
 、y)を決定する。
Therefore, by substituting the following equation (3) into the above equation (2), the point Q (x
, y).

以上は機械位置データDMPの真円運動誤差EPについ
て述べたが、指令補間データDMSの真円運動誤差ES
も同様である。
The above has described the circular motion error EP of the machine position data DMP, but the circular motion error ES of the command interpolation data DMS
The same is true.

このようにして求めた真円運動誤差EP及びESと、真
円データDCとを真円形状グラフィック表示部11がC
RT12に表示させる際は、真円データDCによる真円
の大小に関係なく固定の基準円DC’を設け、真円と基
準円との比率を掛けた真円運動誤差EP’及びES’ 
を表示させることで、スケールオーバーによる表示不可
という事態を防ぐことができる(ステップS6)。第4
図は、CRT12の表示例を示すものであり、X軸上及
びy軸上の点08及び点Oyを通る基準円(真円)に対
する機械位置データDMPの真円運動誤差EP’及び指
令補間データDMSの真円運動誤差ES’を各軸の各現
象について目盛線Sから定量的、かつ直視的に得ること
ができる。第4図では、指令補間データDMSの真円運
動誤差ES’が基準円DC’ とほぼ等しいものとなっ
ている。
The circular motion errors EP and ES obtained in this way and the circular data DC are displayed on the circular shape graphic display section 11.
When displaying on RT12, a fixed reference circle DC' is provided regardless of the size of the perfect circle based on the perfect circle data DC, and the circular motion errors EP' and ES' are calculated by multiplying the ratio of the perfect circle and the reference circle.
By displaying , it is possible to prevent a situation in which display is impossible due to scale over (step S6). Fourth
The figure shows a display example of the CRT 12, and shows the circular motion error EP' of machine position data DMP and command interpolation data with respect to a reference circle (perfect circle) passing through point 08 and point Oy on the X and y axes. The circular motion error ES' of the DMS can be obtained quantitatively and directly from the scale line S for each phenomenon on each axis. In FIG. 4, the circular motion error ES' of the command interpolation data DMS is approximately equal to the reference circle DC'.

なお、上述した実施例ではXY平面内の表示について説
明したが、YZ平面内及びZX平面内の表示も可能であ
り、さらに3次元における任意の平面内の表示も可能で
ある。
In the above-mentioned embodiment, the display in the XY plane was explained, but the display in the YZ plane and the ZX plane is also possible, and furthermore, the display in any three-dimensional plane is also possible.

(発明の効果) 以上のように本発明のNG装置における真円運動誤差表
示方式によれば、NG装置において定量的な真円運動誤
差を簡易にかつ正確に得て表示するので、計測等による
工数を削減することができると共にマニシングセンタ等
のNG工作機械の精度調整を短時間で確実に行なって性
能を向上させることができる。
(Effects of the Invention) As described above, according to the circular motion error display method in the NG device of the present invention, the quantitative perfect circular motion error can be easily and accurately obtained and displayed in the NG device. It is possible to reduce the number of man-hours, and to improve the performance of defective machine tools such as machining centers by reliably adjusting the accuracy in a short time.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明の真円運動誤差表示方式を実現するN
G装置の一例を示すブロック図、第2図はその動作を説
明するフローチャート、第3図は真円運動誤差の演算を
説明する図、第4図はCRTの表示例を示す図である。 1・・・データラッチタイミング発生部、2・・・X 
’Iqb位置検出器、3・・・Y@位置検出器、4・・
・Z軸位置検出器、5・・・機械位置データラッチ部、
6・・・機械位置データ記憶部、7・・・関数発生部、
8・・・指令補間データ記憶部、9・・・真円データ記
憶部、lO・・・真円運動誤差演算部、11・・・真円
形状グラフィック表示部、12・・・CRT 。 第2図
FIG. 1 shows the N
FIG. 2 is a block diagram showing an example of the G device, FIG. 2 is a flowchart explaining its operation, FIG. 3 is a diagram explaining calculation of a circular motion error, and FIG. 4 is a diagram showing an example of display on a CRT. 1...Data latch timing generation section, 2...X
'Iqb position detector, 3...Y@position detector, 4...
・Z-axis position detector, 5... Machine position data latch section,
6... Machine position data storage section, 7... Function generation section,
8... Command interpolation data storage section, 9... Perfect circle data storage section, IO... Perfect circular motion error calculation section, 11... Perfect circular shape graphic display section, 12... CRT. Figure 2

Claims (1)

【特許請求の範囲】[Claims] 数値制御工作機械の真円運動誤差で前記数値制御工作機
械の性能を評価する際、各送り軸の機械位置データを検
出すると共にパートプログラムにより指令補間データを
関数発生し、予め記憶されている真円データに基づいて
前記機械位置データ及び前記指令補間データのそれぞれ
の真円運動誤差を求め、求めた各真円運動誤差を表示画
面上に表示するようにしたことを特徴とする数値制御装
置における真円運動誤差表示方式。
When evaluating the performance of the numerically controlled machine tool based on the circular motion error of the numerically controlled machine tool, the machine position data of each feed axis is detected, and command interpolation data is generated by the part program as a function, and the pre-stored true A numerical control device characterized in that a circular motion error of each of the machine position data and the command interpolation data is determined based on circular data, and each determined circular motion error is displayed on a display screen. Perfect circular motion error display method.
JP62271531A 1987-10-27 1987-10-27 Method for displaying circular motion error in numerical controller Expired - Fee Related JPH07122821B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62271531A JPH07122821B2 (en) 1987-10-27 1987-10-27 Method for displaying circular motion error in numerical controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62271531A JPH07122821B2 (en) 1987-10-27 1987-10-27 Method for displaying circular motion error in numerical controller

Publications (2)

Publication Number Publication Date
JPH01112407A true JPH01112407A (en) 1989-05-01
JPH07122821B2 JPH07122821B2 (en) 1995-12-25

Family

ID=17501361

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62271531A Expired - Fee Related JPH07122821B2 (en) 1987-10-27 1987-10-27 Method for displaying circular motion error in numerical controller

Country Status (1)

Country Link
JP (1) JPH07122821B2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56114686A (en) * 1980-02-08 1981-09-09 Hitachi Ltd Arc interpolation method
JPS60191305A (en) * 1984-03-13 1985-09-28 Mitsubishi Electric Corp Numerical controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56114686A (en) * 1980-02-08 1981-09-09 Hitachi Ltd Arc interpolation method
JPS60191305A (en) * 1984-03-13 1985-09-28 Mitsubishi Electric Corp Numerical controller

Also Published As

Publication number Publication date
JPH07122821B2 (en) 1995-12-25

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