Q: When I use G92 or G76 of GSK 980 TD to turn the thread, there is alarm says the thread spindle speed too slow, however we raise the spindle speed, but the alarm still there, why?

A: It could be the spindle encoder issue, please kindly check if the actual spindle speed match with the display speed or not.

GSK 980 TD Specification:

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