Differences between stepper motor bus control and pulse control

by:V&T Technologies     2020-01-11
Stepping motor controls speed, position and direction by receiving pulse current. The number of pulses determines the position of the stepping motor. The speed of the pulse determines the speed of the motor and the direction of the pulse. Steering of motor. At present, most stepping motors are controlled by the pulse of the driver, which drives the motor to run. Pulse types have existed for decades. In some cases, the demand is relatively high. Pulse types can no longer meet the demand and bus types are required for control. For example, for applications that require many motors, many medical devices have 20 or 30 shafts. If pulse type is used, it is difficult to control. A plc can control up to six or seven axes. When there is more than one machine, it requires a large number of upper-layer computers, which requires a lot of space, and most medical equipment is relatively small and compact. Secondly, the motor has more pulse type wiring and the circuit has multiple. Signal interference problems can lead to equipment instability. If the bus type is used, only two signal lines and power lines are required to connect all motors in series. The design and installation are very convenient. There are a lot of wiring signal interference problems. Some machines own their own computer hosts. If pulse type is used, the host cannot be used. You also need a host or motion control card to control the stepping motor drive system, and the use of bus type can be directly controlled by the computer host, compared with the other two methods, the volume with the professional performance, cost and space of the motion control card mode also has great advantages. Some products require torque mode during movement. For example, the screw locking machine uses torque mode. The pulse type cannot control the motor current to adjust the torque, while the bus type can do it. Compared with the pulse type, the bus type is not only small in size, but also much simpler than the PLC ladder diagram program. It can also make the motor current, voltage, temperature, seat and other real feedback time; Current; Subdivision of time change; Simple control of S-shaped acceleration and deceleration; Analog quantity; Synchronization command; Offline control, etc. Generally, the bus type is pulse type. There are many new functions and no shortcomings. Bus type is the development direction and trend of stepping motor motion control in the future. TAG stepper motor bus control
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