Q: The default setting of spindle speed S is 0 RPM after turn on the GSK980TD, is it adjustable?

A: Yes, for safety reason the default speed is 0 RPM for spindle, you can change it by executing S command under MDI mode after turn on the CNC system.

GSK980TD Specification:

http://www.cncmakers.com/cnc/controllers/CNC_Controllers_for_Lathes/GSK980TD.html