Q: We have a lathe with GSK 928TEII CNC system, the X axis has 3.5mm error and the Z axis has 7mm error by tool compensation setting every time, the problem can be solved by changing the tool compensation. We have checked the mechanical parts are fine, is there anything wrong inside the controller?

A: You can check the tool offset No. 0 first.

GSK 928TEII user manual

http://www.cncmakers.com/cnc/controllers/CNC_Controller_System/GSK928TEII.html