SU1170275A1 - Graph plotter carriage actuator - Google Patents

Abstract

1. DRIVE OF THE GRAPH CONSTRUCTOR'S DRIVE, containing a two-stage drum and an electric motor connected through pulleys by a flexible coupling with a carriage mounted on a guide, differing in the m of that, in order to improve the accuracy of working out the coordinates and simplify the design, the drum has been installed on the carriage and the flexible connection is made in the form of an infinite drive element, one branch of which fits the bottom of the drum of a smaller diameter, and the other covers the top of a larger diameter, while both of the branches There are two pulleys located at opposite ends of the guide, and one of the pulleys is attached to the motor shaft. 2. The drive according to claim 1, characterized in that the endless drive element is made in the form of a perforated tape, and the pulleys and drum steps are serrated, while the pulleys installed at opposite ends of the direction are located in the plane rotated relative to the end of the drum at an angle of оС arctg 8 -h-1-zn, where Рю and D «are the diameters of the corresponding} O t 1/1„ „o -. at the bottom of the ba (O Raban, ah is the width of each step. ND 1 01

Description

The invention relates to the field of instrumentation and can be used to move the registering authority in plotters.

The purpose of the invention is to improve the accuracy of working out the coordinates and simplify the design.

The drawing is a diagram of the drive of the plotter carriage.

The diagram contains a carriage 2 mounted on a straight-line guide 1 with a two-stage drum 3 on the axis 4. There are two tongs 5 and 6 located at opposite ends of the straight-line guide, the driving pulley 6 being mounted on the shaft of the electric motor 7. The endless flexible element 8 pulls along linear guide 1 between the pulleys 5 and 6 and connects the drive pulley 6 with the larger and smaller stages of the two-stage drum 3. To increase the angle of coverage of the flexible element 8 of both stages of the two-stage drum 3 on the carriage 2 Heavy rollers 9 on the axes parallel to the axis of the two-stage drum 3. To reduce the deformation of the flexible element 8, the plane of rotation of the pulleys 5 and 6 is rotated relative to the plane of rotation of the two-stage drum 3. As the flexible element 8, a perforated tape was used, and the shreds 5 and 6 and Both stages of the two-stage drum 3 are provided with teeth (pins). One of the branches of the tape covers the bottom of a larger diameter, and the other - on top of a larger diameter.

Pulleys 5 and 6 are located in a plane rotated relative to the end of the drum

at angle os, where j) s and dk-

diameters of the larger and smaller stages of the drum, respectively; ah is the width of each stage.

The device works as follows. When the motor 7 is rotated and the driving pulley 6 mounted on its shaft is flexible, the tape 8 causes the two-stage drum 3 to rotate. Since its stages have different diameters, simultaneously with the rotation around the axis 4 attached to the carriage 2, the carriage 2 will mix along the rectilinear guide 1.

For each revolution of the electric motor 7, the carriage will move by an amount L, which is determined by the formula

 - W G),) ti n7 i- - - J-B .р. , tch - G1 ..

 - + - DK

Zff-t-ZH

where Da, Dff and D.K are, respectively, the diameters of the driving pulley and the steps of the two-stage drum,

ZB, Zg-, Zji-, respectively, the number of teeth of the driving pulley and the steps of a two-stage drum;

H is the pin of the teeth of these drums, equal to the punching pitch of the flexible tape.

The change in direction of movement of the carriage 2 is achieved by changing the direction of rotation of the electric motor 7.

By choosing the values Pe, T) s and DA or Z, Zff, ZK and H, respectively (since Р ZH), provide the necessary conversion factor of the entire device without the use of additional

0 gear reducers. For example, when using the proposed device in a plotter, which is driven by a stepper motor SCHD-5M, having 240 steps per revolution of the rotor shaft, with Zft 20, Zfi 22, Z 18

5 and the pitch of the teeth H 12 mm, the price of the plotter impulse is 0.1 mm, and at the pitch H 6 mm b 0.05 mm. With ZB 21, Zg-22. Zji 20 and H 12 mm, 5 0.05 mm is provided, and with H 6 mm b 0.025 mm.

Claims (2)

1. DRIVER CARRIAGE OF THE CRAFTER PLOTTER, comprising a two-stage drum and an electric motor connected via pulleys with a flexible connection to a carriage mounted on a rail, characterized in that, in order to improve the accuracy of working out the coordinates and simplify the design, the two-stage drum is mounted on the carriage, and the flexible connection is made in in the form of an infinite drive element, one branch of which covers the lower stage of the drum of a smaller diameter, and the other covers the upper stage of a larger diameter from the top, while both branches cover two and a pulley located at opposite ends of the guide, with one of the pulleys mounted on the motor shaft. 2. Drive on π. 1, characterized in that the endless drive element is made in the form of a perforated tape, and the pulleys and drum stages are toothed, while the pulleys mounted at the opposite ends of the guide are located in a plane rotated relative to the end of the drum by an angle a = arctg -, where RU and Dh are the diameters of the higher and lower stages of the drum, respectively, ah is the width of each stage.