Double-stepping servo guide belt control system

Abstract

The invention discloses a double-stepping servo guide belt control system. The double-stepping servo guide belt control system comprises stepping motors, ribbon reels and a controller, wherein the stepping motors and the ribbon reels are both provided with two, the stepping motors are connected to the ribbon reels in a bearing mode, and the stepping motors are electrically in connection with the controller; and the controller is internally provided with a position speed servo control mode, a speed torque servo control mode and a position speed open loop control mode. According to the double-stepping servo guide belt control system, the two motors are adopted independent servo control modes and do not depend on other sensors or circuits to assist in measuring the tension of a ribbon, so that the mechanical mechanism and the circuit design are simplified.

Description

technical field [0001] The invention relates to the technical field of printer drives, in particular to a dual-step servo-guided tape control system. Background technique [0002] In ribbon transfer printers, the ribbon is typically supplied to the end user as a roll wound on a core. In use, the user installs the core onto the ribbon spool, pulls the free end of the ribbon roll to release a length of ribbon, passes the ribbon around the ribbon transfer roller, and finally bonds the end of the ribbon to another ribbon spool . The spool and the ribbon transition roller can be on the ribbon cassette, or in the printing body under the structure without the ribbon cassette, and the structure using the ribbon cassette can be more convenient for users to operate and use. The printing machine includes a conveyor that drives two spools to unwind ribbon from one spool and wind it onto the other spool. In the existing printers of the above types, there are mainly the following ways ...

AI Technical Summary

Problems solved by technology

Relying on the tension generated by the transition roller slipping to the ribbon, the transition roller will reciprocate every time it is printed. Under different speeds and different printing frequencies, the reciprocating frequency of the transition roller is not fixed, which affects each time. The tension measurement accuracy is very unreliable

During the printing process, the ribbon is pressed tightly against the target material, so when there is a speed difference between the ribbon running speed and the target material speed, the distance error generated on the ribbon will be stored in the slip of the transition roller, which causes In addition to the inaccurate position of the traces printed on the ribbon, it is easy to overlap the printed content under severe conditions, resulting in incomplete transferred content; relying on the sliding clutch to provide resistance requires high mechanical tolerances, and With the wear and tear of the machine, the output resistance will also be affected, which directly affects the ribbon winding effect. In severe cases, the ribbon will deviate and cannot completely cover the heat-generating area of ​​the printed body, making the content printed on the target material Incomplete; the method of adjusting the tension of the ribbon by collecting the motor drive current value has high requirements for the circuit design and production of the control board, high chip cost, and limited space for technology upgrades

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