Q: There are two kinds of machine zero return of the GSK980TDb control, C type and B type, what is the difference?

A: One is from positive direction, the other is from negative direction.

     B type: the axis slow down and move on after the block, then reach the zero point of the first zero signal.

     C type: The axis slow down after the block and move on, then move back to find the zero point, passing by the block again, then reach the first zero signal as zero point.

GSK980TDb Specification:

http://www.cncmakers.com/cnc/controllers/CNC_Controller_System/GSK980TDb.html