Q: A CNC milling machine with 1600*410mm work table, the weight of the table and the workpiece is about 800KG, ball screw Dia. 50mm and the pitch is 10, the rail friction coefficient is 0.18uf (both cast iron), no need cutting force, just for positioning, then how big the AC servo motor is required for this? To match with GSK 990MA CNC system.

A: according to your description, we recommend you to use 18NM AC servo motor or bigger.

GSK990MA Specification:

http://www.cncmakers.com/cnc/controllers/CNC_Controllers_for_Milling/GSK990MA.html