Q.What are the 1-pulse input mode and 2-pulse input mode for drivers?

Pulse input mode is a method for determining the rotation direction of the motor by pulse signal input to the driver. Stepping motors and servo motors can determine not only the rotation direction but also factors such as displacement and speed through pulse signals. The differences in input modes are as follows.

2-pulse (CW/CCW) input method
A method of determining the rotation direction based on whether pulses are input to the CW input section or the CCW input section

1-pulse (PULSE/SIG) input method
A method of determining the rotation direction based on whether the rotation direction input section is at an H/L level when pulses are input to the pulse signal input section

Phase Difference Input Method (A-phase B-phase Pulse Input Mode)^*
A method of determining the rotation direction by inputting pulses with a 90° phase difference between A-phase and B-phase, and identifying the advancing phase to determine the direction of rotation

• *Phase difference input mode (Phase A/Phase B pulse input mode) is available only for certain products.

The following phenomena occur when the driver pulse method and controller are set differently.

• Rotation direction will not switch
• Rotates in only 1 direction

For this reason, the pulse output mode of the controller (pulse generator) and the input mode of the driver used must be set the same when used in combination.
Note that most Oriental Motor's stepping motors, servo motors, and controllers are set to the 2-pulse input mode at the time of shipment. (The controller can be used to change output mode on certain products.)