WO1997033730A1 - Cutting apparatus with step-motor drive - Google Patents

Cutting apparatus with step-motor drive Download PDF

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Publication number
WO1997033730A1
WO1997033730A1 PCT/DE1997/000209 DE9700209W WO9733730A1 WO 1997033730 A1 WO1997033730 A1 WO 1997033730A1 DE 9700209 W DE9700209 W DE 9700209W WO 9733730 A1 WO9733730 A1 WO 9733730A1
Authority
WO
WIPO (PCT)
Prior art keywords
arrangement according
carriage
knife
cut
cutting
Prior art date
Application number
PCT/DE1997/000209
Other languages
German (de)
French (fr)
Inventor
Wilfried Dobring
Wolfgang Malke
Original Assignee
Siemens Nixdorf Informationssysteme Ag
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 Siemens Nixdorf Informationssysteme Ag filed Critical Siemens Nixdorf Informationssysteme Ag
Publication of WO1997033730A1 publication Critical patent/WO1997033730A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/086—Electric, magnetic, piezoelectric, electro-magnetic means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/04—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member
    • B26D1/06—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B26D1/085—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type for thin material, e.g. for sheets, strips or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D3/00—Cutting work characterised by the nature of the cut made; Apparatus therefor
    • B26D3/12—Slitting marginal portions of the work, i.e. forming cuts, without removal of material, at an angle, e.g. a right angle, to the edge of the work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/02—Means for moving the cutting member into its operative position for cutting
    • B26D5/06—Means for moving the cutting member into its operative position for cutting by electrical means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/26—Means for mounting or adjusting the cutting member; Means for adjusting the stroke of the cutting member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/66—Applications of cutting devices
    • B41J11/70—Applications of cutting devices cutting perpendicular to the direction of paper feed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J11/00—Devices or arrangements  of selective printing mechanisms, e.g. ink-jet printers or thermal printers, for supporting or handling copy material in sheet or web form
    • B41J11/66—Applications of cutting devices
    • B41J11/70—Applications of cutting devices cutting perpendicular to the direction of paper feed
    • B41J11/703—Cutting of tape

Definitions

  • the arrangement relates to the control of a cutting device.
  • a cutting device is provided which separates the printed part from the supply.
  • Such a cutting device is usually operated by a motor and controlled by the control, which also acts on the paper transport. Position switches must be provided and connected to the control so that the paper knife executes the desired movement exactly. In particular, it is desirable to be able to carry out a complete cut as well as a cut in which a small cut length remains uncut by reducing the depth of cut.
  • a solution to this is shown in DE PS 43 15 507 C1, in which a curved path moves the knife and mechanical means are used to switch between full and first cut.
  • a cutting knife driven by a direct current motor is shown, in which the depth of movement for a cut with a tear-off residue is determined by an additional (to be adjusted) sensor.
  • the object of the invention is to provide a cutting device in which, for each cut, a fully permanent section or one with demolition residue can be selected without the need for a position sensor.
  • the invention uses a stepper motor which transmits its rotary movement into a linear movement on the knife by means of a worm, an intermediate wheel and a toothed rack.
  • a digital control uses the number of steps to control whether a full cut or a cut is carried out.
  • the preferred embodiment does not require any mechanical adjustment and without any position indicator, so that the drive is considerably simplified.
  • FIG. 1 shows a schematic illustration of a cutting device with a stepping motor
  • Fig. 3 shows an alternative drive with a steel belt.
  • the cutting device consists of a carriage 6, which is mounted in a known manner on a fixed housing part 5 in the direction of arrow A slidably.
  • the carriage carries a cutting knife 7, which can separate the paper web when moving in the direction of arrow A by means of a counter knife 8.
  • a toothed rack 9 is fastened to the other end of the slide and is moved via a segment gearwheel 10 by a worm wheel 11 driven directly by a stepping motor 12.
  • the toothed rack, the toothed wheel, the worm wheel and the stepping motor are preferably designed such that the knife completely cuts the paper web in about 90 steps.
  • a knife 7 according to FIG. 2 is used with cut edges which are oblique to the edge of the counter knife 8 and arranged in a V-shape relative to one another, then a smaller number of steps, e.g. An initial cut is carried out in 75 steps, in which a small tear-off bar in the middle is not severed. The difference between full cut and first cut therefore only requires a different number of steps and no additional position indicators that have to be adjusted.
  • the knife 7 can also be provided with a single cutting edge positioned obliquely to the edge of the counter knife 8. The tear-off web then forms on a side edge of the paper web.
  • the adjustment is made in that, for example, a wall in the housing part 5 forms a stop 13 in the removed state of the knife.
  • the control moves the slide into the opposite position with a number of steps that are above the number required for a full cut, in the example 120 steps.
  • the carriage is prevented from moving by the stop 13, so that the stepper motor loses steps, but afterwards in a known manner Position is.
  • the stepper motor is then expediently moved a small number of steps out of the adjustment position in order not to drive against the stop with each cut.
  • the position of the stop only needs to be determined precisely within the usual manufacturing tolerances and not to be mechanically adjusted. Rather, a number of test cuts are carried out in which the number of steps is varied. The optimal number of steps is then recorded in a non-volatile memory of the control. Alternatively, of course, a predetermined number of steps can also be used and a known mechanical adjusting screw can be used as the stop 13.
  • the drive shown with worm wheel, segment gear and rack has the advantage that the stepper motor can deliver a pushing force with high mechanical efficiency, so that motor, slide and knife can be arranged in one unit on the same side of the paper web, - with a drive through In the rest position, the knife and drive would have to be on different sides of the paper web.
  • the motor is arranged perpendicular to the direction of movement of the slide and therefore does not contribute to increasing the overall height.
  • a threaded spindle on the motor axis can also engage directly in a spindle nut in the slide 6 or on an attachment which is fastened on the slide 6.
  • a drive can also take place via a steel belt 31, which, as shown in FIG. 3, is wound onto a wheel 32 or can unwind from it.
  • the engine can only exert a pull, the opposite direction is carried out by a compression spring 33.
  • the stepper motor since it also has to tension the spring 33, has to use twice the torque compared to the arrangement with worm and rack, which is offset by the better mechanical efficiency.
  • a cam disc can also be used on a stepper motor with a high number of steps per revolution. Incremental numbers of 200 per revolution are readily available, even with small motor designs.
  • the cam disc either exerts only pressure in one direction against a spring, or it is designed as a link wheel in which a driver engages on the carriage.
  • a steel cable and a cable pulley which is preferably wrapped around a plurality of times, on the axis of the stepping motor and at least one deflecting pulley, so that the stepping motor can exert a pull in both directions of rotation on the slide in opposite directions, the necessary tension spring is attached to the leading edge of the knife in the return direction.
  • the tension spring is force-neutral, so that, as in the preferred drive with worm, gear and rack, only the simple pushing force has to be applied by the stepper motor. Since frequent calibration by the stop is possible without any problems, a slight or occasional slip on the rope pulley does not have any significant effect.
  • the number of steps for a step can also be extended with the number of cuts after a calibration according to an empirically or theoretically determined extension factor, without a calibration being necessary for each cut. dig that often causes increased operating noise due to the loss of step in the stepper motor.
  • This extension factor is practically achieved by inserting an additional 5 step in the cutting direction after a predetermined number of cuts.
  • the controller can count the number of Schnit ⁇ th and kompensie ⁇ ren wear of the cutting knife by a slightly elongated cutting motion. This is in the previously known solutions when 0 at all directions only by expensive zustatzliche Versmaschinein ⁇ possible.

Abstract

The invention relates to an arrangement for driving a cutting blade (7) for cutting a document printed in printing means on a strip-like recording carrier (1). The cutting blade (7) is attached to a carriage (6) which is driven by a step motor (12).

Description

Abschneidevorrichtung mit Schrittmotorantrieb Cutting device with stepper motor drive
Technisches GebietTechnical field
Die Anordnung betrifft die Ansteuerung einer Abschneide- Vorrichtung.The arrangement relates to the control of a cutting device.
Stand der TechnikState of the art
In Druckern, beispielsweise in Bondruckern von Kassen, mit Endlospapier beispielsweise in Rollenform, ist eine Abschneidevorrichtung vorgesehen, die den bedruckten Teil von dem Vorrat trennt.In printers, for example in receipt printers of cash registers, with continuous paper, for example in roll form, a cutting device is provided which separates the printed part from the supply.
Eine solche Abschneidevorrichtung wird üblicherweise mo¬ torisch betrieben und von der Steuerung, die auch den Pa¬ piertransport beaufschlagt, gesteuert. Dabei sind Lage¬ schalter vorzusehen und mit der Steuerung zu verbinden, so daß das Papiermesser genau die gewünsche Bewegung aus- führt. Insbesondere ist es wünschenswert, sowohl ein vollständiges Abschneiden als auch ein Anschneiden durch¬ führen zu können, bei dem durch Reduktion der Schnittiefe ein geringes der Schnittlänge ungeschnitten verbleibt. Eine Lösung hierzu ist in der DE PS 43 15 507 Cl darge- stellt, bei der eine Kurvenbahn das Messer bewegt und me¬ chanische Mittel dazu dienen, zwischen Voll- und An¬ schnitt zu wechseln. In der Patent Abstracts of Japan M- 1460 zu JP 5-92629A wird ein von einem Gleichstrommotor angetriebenes Schnittmesser gezeigt, bei dem die Bewe- gungstiefe für einen Schnitt mit Abrißrest durch einen zusätzlichen (zu justierenden) Sensor bestimmt wird.Such a cutting device is usually operated by a motor and controlled by the control, which also acts on the paper transport. Position switches must be provided and connected to the control so that the paper knife executes the desired movement exactly. In particular, it is desirable to be able to carry out a complete cut as well as a cut in which a small cut length remains uncut by reducing the depth of cut. A solution to this is shown in DE PS 43 15 507 C1, in which a curved path moves the knife and mechanical means are used to switch between full and first cut. In the Patent Abstracts of Japan M-1460 to JP 5-92629A, a cutting knife driven by a direct current motor is shown, in which the depth of movement for a cut with a tear-off residue is determined by an additional (to be adjusted) sensor.
Aufgabe der Erfindung ist es, eine Abschneidevorrichtung anzugeben, bei der für jeden Schnitt wahlweise ein voll- ständiger- Abschnitt oder einer mit Abrißrest ausgewählt werden kann, ohne daß ein Positionssensor benötigt wird.The object of the invention is to provide a cutting device in which, for each cut, a fully permanent section or one with demolition residue can be selected without the need for a position sensor.
Darstellung der ErfindungPresentation of the invention
Die Erfindung verwendet einen Schrittmotor, der mittels einer Schnecke, einem Zwischenrad und einer Zahnstange seine Drehbewegung in eine Linearbewegung auf das Messer überträgt. Eine digitale Steuerung steuert über die An¬ zahl der Schritte, ob ein Voll- oder Anschnitt ausgeführt wird. Wie in der Beschreibung näher ausgeführt wird, kommt die bevorzugte Ausfuhrungsform ohne mechanische Ju- stage und ohne jegliche Lagemelder aus, so daß der An¬ trieb wesentlich vereinfacht ist.The invention uses a stepper motor which transmits its rotary movement into a linear movement on the knife by means of a worm, an intermediate wheel and a toothed rack. A digital control uses the number of steps to control whether a full cut or a cut is carried out. As will be explained in more detail in the description, the preferred embodiment does not require any mechanical adjustment and without any position indicator, so that the drive is considerably simplified.
Kurzbeschreibung der ZeichnungenBrief description of the drawings
Es zeigenShow it
Fig. 1 eine schematische Darstellung einer Schnittein¬ richtung mit Schrittmotor,1 shows a schematic illustration of a cutting device with a stepping motor,
Fig. 2 die bevorzugte Messerform,2 the preferred knife shape,
Fig. 3 einen alternativen Antrieb mit einem Stahlband.Fig. 3 shows an alternative drive with a steel belt.
Detaillierte Beschreibung der ErfindungDetailed description of the invention
In Fig. 1 ist ein Druckwerk mit Abschneidevorrichtung ge¬ zeigt, bei dem von einer Vorratsrolle l zu bedruckendes Material, hier Papier, als Papierbahn 2 von Leitblechen 3a, 3b, welche Teil eines nicht gezeigten Druckwerks be¬ kannter Art sind, an der Abschneideeinrichtung vorbei durch einen Ausgabeschlitz 4a, 4b geführt ist. Die Abschneidevorrichtung besteht aus einem Schlitten 6, welcher in bekannter Art an einem festen Gehäuseteil 5 in Richtung des Pfeiles A verschieblich gelagert ist. Der Schlitten trägt ein Schneidemesser 7, das bei Bewegung in Richtung des Pfeiles A mittels eines Gegenmessers 8 die Papierbahn trennen kann.1 shows a printing unit with a cutting device, in which material to be printed on from a supply roll 1, here paper, as paper web 2 of guide plates 3a, 3b, which are part of a printing unit of a known type, not shown, on the cutting device is passed through an output slot 4a, 4b. The cutting device consists of a carriage 6, which is mounted in a known manner on a fixed housing part 5 in the direction of arrow A slidably. The carriage carries a cutting knife 7, which can separate the paper web when moving in the direction of arrow A by means of a counter knife 8.
An dem anderen Ende des Schlittens ist eine Zahnstange 9 befestigt, welche über ein Segementzahnrad 10 von einem von einem Schrittmotor 12 direkt angetriebenen Schnecken- rad 11 bewegt wird. Dabei sind die Zahnstange, das Zahn¬ rad, das Schneckenrad und der Schrittmotor bevorzugt so ausgelegt, daß mit etwa 90 Schritten das Messer die Pa¬ pierbahn vollständig durchtrennt.A toothed rack 9 is fastened to the other end of the slide and is moved via a segment gearwheel 10 by a worm wheel 11 driven directly by a stepping motor 12. The toothed rack, the toothed wheel, the worm wheel and the stepping motor are preferably designed such that the knife completely cuts the paper web in about 90 steps.
Wird ein Messer 7 nach Fig. 2 mit gegenüber der Kante des Gegenmessers 8 schrägen, V-förmig zueinander angeordneten Schnittkanten verwendet, so kann durch eine geringere Schrittanzahl von z.B. 75 Schritten ein Anschnitt durch¬ geführt werden, bei dem in der Mitte ein kleiner Abrei߬ steg nicht durchtrennt wird. Der Unterschied zwischen Vollschnitt und Anschnitt erfordert daher lediglich eine andere Schrittzahl und keine zusätzlichen Lagemelder, die justiert werden müssen. Das Messer 7 kann auch mit einer einzigen, schräg zu der Kante des Gegenmessers 8 ange¬ stellten Schnittkante versehen sein. Der Abreißsteg bil- det sich dann an einer Seitenkante der Papierbahn.If a knife 7 according to FIG. 2 is used with cut edges which are oblique to the edge of the counter knife 8 and arranged in a V-shape relative to one another, then a smaller number of steps, e.g. An initial cut is carried out in 75 steps, in which a small tear-off bar in the middle is not severed. The difference between full cut and first cut therefore only requires a different number of steps and no additional position indicators that have to be adjusted. The knife 7 can also be provided with a single cutting edge positioned obliquely to the edge of the counter knife 8. The tear-off web then forms on a side edge of the paper web.
Die Justierung erfolgt dadurch, daß beispielsweise eine Wand im Gehäuseteil 5 einen Anschlag 13 im weggefahrenen Zustand des Messers bildet. Die Steuerung fährt zur Kali¬ brierung, z.B. nach jedem Einschalten, mit einer Anzahl von Schritten, die über der für einen Vollschnitt notwen¬ digen Anzahl liegt, im Beispiel 120 Schritte, den Schlit¬ ten in die Gegenposition. Dabei wird der Schlitten durch den Anschlag 13 an einer Bewegung gehindert, so daß der Schrittmotor Schritte verliert, aber hernach in bekannter Position ist. Zweckmäßigerweise wird danach der Schritt¬ motor eine geringe Zahl von Schritten aus der Justage- stellung gefahren, um nicht bei jedem Schnitt gegen den Anschlag zu fahren.The adjustment is made in that, for example, a wall in the housing part 5 forms a stop 13 in the removed state of the knife. For calibration purposes, for example after each switch-on, the control moves the slide into the opposite position with a number of steps that are above the number required for a full cut, in the example 120 steps. The carriage is prevented from moving by the stop 13, so that the stepper motor loses steps, but afterwards in a known manner Position is. The stepper motor is then expediently moved a small number of steps out of the adjustment position in order not to drive against the stop with each cut.
Die Lage des Anschlags braucht nur im Rahmen der üblichen Fertigungstoleranzen genau bestimmt und nicht mechanisch justiert zu werden. Vielmehr wird eine Anzahl von Probe¬ schnitten durchgeführt, bei denen die Anzahl der Schritte variert wird. Die optimale Schrittzahl wird dann in einem nichtflüchtigen Speicher der Steuerung festgehalten. Al¬ ternativ kann selbstverständlich auch eine vorbestimmte Anzahl von Schritten verwendet werden und eine bekannte mechanische Justierschraube als Anschlag 13 verwendet werden.The position of the stop only needs to be determined precisely within the usual manufacturing tolerances and not to be mechanically adjusted. Rather, a number of test cuts are carried out in which the number of steps is varied. The optimal number of steps is then recorded in a non-volatile memory of the control. Alternatively, of course, a predetermined number of steps can also be used and a known mechanical adjusting screw can be used as the stop 13.
Der dargestellte Antrieb mit Schneckenrad, Segmentzahnrad und Zahnstange hat den Vorteil, daß der Schrittmotor mit hohem mechanischem Wirkungsgrad eine Schubkraft liefern kann, sodaß Motor, Schlitten und Messer in einer Einheit auf derselben Seite der Papierbahn angeordnet sein kön- nen,- bei einem Antrieb durch Zug müßten sich in Ruhestel¬ lung Messer und Antrieb auf verschienen Seiten der Pa¬ pierbahn befinden. Durch die Richtungsumsetzung des Zahn¬ rads ist der Motor senkrecht zur der Bewegungsrichtung des Schlittens angeordnet und trägt damit nicht zur Erhö- hung der Bauhöhe bei.The drive shown with worm wheel, segment gear and rack has the advantage that the stepper motor can deliver a pushing force with high mechanical efficiency, so that motor, slide and knife can be arranged in one unit on the same side of the paper web, - with a drive through In the rest position, the knife and drive would have to be on different sides of the paper web. By changing the direction of the toothed wheel, the motor is arranged perpendicular to the direction of movement of the slide and therefore does not contribute to increasing the overall height.
Sofern die größere Bauhöhe nicht stört, kann auch eine Gewindespindel auf der Motorachse direkt in eine Spindel- mutter in dem Schlitten 6 oder an einem Aufsatz, der auf dem Schlitten 6 befestigt wird, greifen.If the greater overall height does not interfere, a threaded spindle on the motor axis can also engage directly in a spindle nut in the slide 6 or on an attachment which is fastened on the slide 6.
Alternativ kann auch ein Antrieb über ein Stahlband 31 erfolgen, welches, wie in Fig. 3 dargestellt, auf ein Rad 32 aufgewickelt wird bzw. sich von diesem abwickeln kann. Hierbei kann der Motor allerdings nur einen Zug ausüben,- die Gegenrichtung wird durch eine Druckfeder 33 ausge¬ führt. Obwohl hierbei keine gezahnten Maschinenelemente benötigt werden, muß der Schrittmotor, da er ja auch die Feder 33 spannen muß, das doppelte Drehmoment gegenüber den Anordnung mit Schnecke und Zahnstange aufwenden, was durch den besseren mechanischen Wirkungsgrad aufgewogen wird.Alternatively, a drive can also take place via a steel belt 31, which, as shown in FIG. 3, is wound onto a wheel 32 or can unwind from it. Here, however, the engine can only exert a pull, the opposite direction is carried out by a compression spring 33. Although no toothed machine elements are required here, the stepper motor, since it also has to tension the spring 33, has to use twice the torque compared to the arrangement with worm and rack, which is offset by the better mechanical efficiency.
Auch kann eine Kurvenscheibe auf einem Schrittmotor mit hoher Schrittzahl pro Umdrehung verwendet werden. Schrittzahlen von 200 pro Umdrehung sind auch bei kleinen Motor-Bauformen ohne weiteres handelsüblich. Die Kurven¬ scheibe übt wie beim Bandantrieb entweder nur einen Druck in einer Richtung gegen eine Feder aus, oder sie ist als Kulissenrad ausgebildet, in das ein Mitnehmer auf dem Schlitten eingreift.A cam disc can also be used on a stepper motor with a high number of steps per revolution. Incremental numbers of 200 per revolution are readily available, even with small motor designs. As in the case of the belt drive, the cam disc either exerts only pressure in one direction against a spring, or it is designed as a link wheel in which a driver engages on the carriage.
Möglich ist auch die Verwendung eines Stahlseils und ei¬ ner vorzugsweise mehrfach umschlungenen Seilrolle auf der Achse des Schrittmotors sowie mindestens einer Umlenkrol¬ le, so daß der Schrittmotor einen Zug in beiden Drehrich- tungen in jeweils entgegengesetzte Richtungen auf den Schlitten ausüben kann, wobei die notwendige Spannfeder an der in Rückholrichtung voreilenden Kante des Messers angebracht ist liegt. Die Spannfeder ist dabei kraftneu¬ tral, so daß wie bei dem bevorzugten Antrieb mit Schnek- ke, Zahnrad und Zahnstange nur die einfache Schubkraft von dem Schrittmotor aufgebracht werden muß. Da eine häu¬ fige Kalibrierung durch den Anschlag problemlos möglich ist, wirkt sich ein geringer oder gelegentlicher Schlupf auf der Seilrolle nicht wesentlich aus. Da die Hauptkraft in Schneiderichtung auftritt, kann auch die Anzahl der Schritte für eine Schritt gemäß einem empirisch oder theoretisch ermittelten Verlängerungsfakter mit der An¬ zahl der Schnitte nach einer Kalibrierung verlängert wer¬ den, ohne daß bei jedem Schnitt eine Kalibrierung notwen- dig ist, die durch den Schrittverlust im Schrittmotor häufig ein erhöhtes Betreibsgeräusch verursacht. Prak¬ tisch wird dieser Verlängerungsfaktor dadurch erreicht, daß nach einer vorab bestimmten Anzahl von Schnitten ein 5 zusäztlicher Schritt in Schnittrichtung eingefügt wird.It is also possible to use a steel cable and a cable pulley, which is preferably wrapped around a plurality of times, on the axis of the stepping motor and at least one deflecting pulley, so that the stepping motor can exert a pull in both directions of rotation on the slide in opposite directions, the necessary tension spring is attached to the leading edge of the knife in the return direction. The tension spring is force-neutral, so that, as in the preferred drive with worm, gear and rack, only the simple pushing force has to be applied by the stepper motor. Since frequent calibration by the stop is possible without any problems, a slight or occasional slip on the rope pulley does not have any significant effect. Since the main force occurs in the cutting direction, the number of steps for a step can also be extended with the number of cuts after a calibration according to an empirically or theoretically determined extension factor, without a calibration being necessary for each cut. dig that often causes increased operating noise due to the loss of step in the stepper motor. This extension factor is practically achieved by inserting an additional 5 step in the cutting direction after a predetermined number of cuts.
In allen Fällen kann die Steuerung die Anzahl der Schnit¬ te mitzählen und eine Abnutzung des Schneidemessers durch eine geringfügig verlängerte Schnittbewegung kompensie¬ ren. Dies ist bei den bisher bekannten Lösungen wenn 0 überhaupt nur durch aufwendige zustatzliche Versteilein¬ richtungen möglich. In all cases, the controller can count the number of Schnit¬ th and kompensie¬ ren wear of the cutting knife by a slightly elongated cutting motion. This is in the previously known solutions when 0 at all directions only by expensive zustatzliche Versteilein¬ possible.

Claims

Patentansprüche Claims
1. Anordnung zum Antrieb eines Schnittmessers (7) zum Abschneiden eines in einer Druckeinrichtung auf einen bandförmigen Aufzeichnungsträger (2) aufgedruckten1. Arrangement for driving a cutting knife (7) for cutting a printed in a printing device on a tape-shaped recording medium (2)
5 Belegs mit einem Schnittmesser (7) , welches auf einem von einem Motor (12) bewegten Schlitten (6) befestigt ist und mindestens eine schräg zur Bewegungsrichtung des Messers verlaufende Schnittkante aufweist, da¬ durch gekennzeichnet, daß als Motor ein Schrittmo- 10 tor (12) verwendet wird und durch unterschiedliche Schrittzahlen für jeden Schnitt bestimmt wird, ob ein vollständiger Abschnitt oder ein Schnitt mit Abri߬ rest bewirkt wird.5 documents with a cutting knife (7) which is fastened on a carriage (6) moved by a motor (12) and has at least one cutting edge running obliquely to the direction of movement of the knife, characterized in that a stepping motor is used as the motor (12) is used and it is determined by different step numbers for each cut whether a complete section or a cut with a tear-off residue is effected.
2. Anordnung nach Anspruch 1, wobei ein Schneckenrad 15 (11) auf einer Achse des Schrittmotors (12) über ein2. Arrangement according to claim 1, wherein a worm wheel 15 (11) on an axis of the stepping motor (12) via
Zahnrad (10) auf eine Zahnstange (9) wirkt, die kraftschlüssig mit dem Schlitten (6) verbunden ist.Gear (10) acts on a rack (9) which is non-positively connected to the carriage (6).
3. Anordnung nach Anspruch 1, wobei eine Achse des Schrittmotors (12) mit einer Gewindespindel oder ei-3. Arrangement according to claim 1, wherein an axis of the stepping motor (12) with a threaded spindle or egg
20 nem Schneckenrad versehen ist, die bzw. das auf ein in den Schlitten geschnittenes oder mit diesem unmit¬ telbar verbundenes Gegenstück wirk .20 nem worm wheel is provided, which acts on a cut in the carriage or directly connected to its counterpart.
4. Anordnung nach Anspruch 1, wobei ein flexibles Band4. Arrangement according to claim 1, wherein a flexible band
(31) einerseits radial auf einer auf eine Achse des 25 Schrittmotors aufgesetzten Rolle befestigt und ande¬ rerseits an dem Schlitten (6) befestigt ist, das den Schlitten gegen eine Federkraft (33) bewegt.(31), on the one hand, is fastened radially on a roller placed on an axis of the stepping motor and, on the other hand, is fastened to the carriage (6) which moves the carriage against a spring force (33).
5. Anordnung nach Anspruch 1, wobei eine Kurven- oder Kulissenscheibe auf einer Achse des Schrittmotors5. Arrangement according to claim 1, wherein a cam or link disc on an axis of the stepper motor
30 (12) aufgesetzt ist und auf einen Mitnehmer wirkt, der direkt auf den Schlitten aufgesezt ist.30 (12) is placed on and acts on a driver, which is mounted directly on the carriage.
6. Anordnung nach Anspruch 1, wobei ein Seil von einem auf einer Achse des Schrittmotors (12) befindlichen Seilrolle mittels mindestens einer Umlenkrolle einen Zug in beiden Richtungen auf den Schlitten ausübt.6. Arrangement according to claim 1, wherein a rope of one located on an axis of the stepping motor (12) Rope roller exerts a pull in both directions on the slide by means of at least one deflection roller.
7. Anordnung nach Anspruch 7, wobei der Schlupf des Sei¬ les auf der Seilrolle durch zusätzliche Schritte kom- pensiert wird, deren Anzahl und Häufigkeit aus der Anzahl der seit der letzten Kalibrierung erfolgten Schritte bestimmt wird.7. Arrangement according to claim 7, wherein the slippage of the rope on the rope pulley is compensated for by additional steps, the number and frequency of which is determined from the number of steps that have taken place since the last calibration.
8. Anordnung nach einem der vorhergehenden Ansprüche, wobei eine Justage der Schnittiefe durch Probeschnit- te und Ablegen der optimalen Schrittzahlen in einem nichtflüchtigen Speicher einer den Schrittmotor steu¬ ernden Steuerung erfolgt.8. Arrangement according to one of the preceding claims, wherein an adjustment of the depth of cut is carried out by trial cuts and storing the optimum number of steps in a non-volatile memory of a controller controlling the stepper motor.
9. Anordnung nach einem der vorhergehenden Ansprüche, wobei die Abnutzung des Schneidemessers aus der An¬ zahl der erfolgten Schnitte bestimmt und ein entspre¬ chend vergrößterter Schnittweg durch eine größere An¬ zahl von Schritten erreicht wird.9. Arrangement according to one of the preceding claims, wherein the wear of the cutting knife is determined from the number of cuts made and a correspondingly enlarged cutting path is achieved by a larger number of steps.
10. Anordnung nach einem der vorhergehenden Ansprüche, wobei ein Messer (7) verwendet wird, dessen Schnitt- kante(n) gegenüber dem Gegenmesser (8) um ein gerin¬ ges schräg verlaufen. 10. Arrangement according to one of the preceding claims, wherein a knife (7) is used, the cutting edge (s) with respect to the counter knife (8) are inclined by a slight.
PCT/DE1997/000209 1996-03-11 1997-02-03 Cutting apparatus with step-motor drive WO1997033730A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19609527.1 1996-03-11
DE1996109527 DE19609527C2 (en) 1996-03-11 1996-03-11 Arrangement for driving a cutting knife for cutting a tape-shaped recording medium which can be printed in a printing device

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WO1997033730A1 true WO1997033730A1 (en) 1997-09-18

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CN104772778A (en) * 2015-04-15 2015-07-15 天地融科技股份有限公司 Cutting machine
CN104772779B (en) * 2015-04-15 2017-05-24 天地融科技股份有限公司 Cutting device
CN110883803A (en) * 2019-11-28 2020-03-17 徐州格利尔科技有限公司 LED lamp area cutting device
CN111872993A (en) * 2020-07-10 2020-11-03 宋秋霞 Asparagus cutting equipment
CN112549110A (en) * 2020-11-24 2021-03-26 郑玉 Traditional chinese medicine branch of academic or vocational study medicinal material cutting device

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DE19654905A1 (en) 1997-11-13
DE19609527A1 (en) 1997-09-18

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