D1-N Series Servo Drive User Manual Operation Principles
HIWIN MIKROSYSTEM Corp. 3-15
3.10 Enabling
Enabling must be completed before motor receives any motion command. After enabling, the servo drive
is able to receive pulse commands or voltage commands from controller to perform motion control.
(1) Step motion mode (SM mode)
Step motion mode (SM mode) is an open loop architecture. In this mode, the movement of motor is
similar to step motor. Feedback position signal is not adopted when enabling. This mode can be
used to check if force direction is consistent with encoder feedback direction. If force direction and
encoder feedback direction are different, phase initialization could fail.
(2) Phase initialization
If the servo drive works with incremental encoder, when its power is turned on for the first time, the
procedure of finding electrical angle or phase initialization must be done. For HIWIN linear servo
motor, electrical angle can be successfully found without moving the motor. Another commonly-used
method for phase initialization is by Hall sensor. Normally phase initialization and enabling can be
completed via an output signal from controller (such as I1 input of D1-N servo drive).