When I try to go up to manufacture endmill feed and speed anything over 150mm/min feed my cnc dosnt cut straight, follow part design , gets all out of wack. ANY help or suggestions Yes belts , pullyes etc all checked.
Need more input like bit used, diameter and flutes, RPM, depth per cut, what material… 
maker of endmill suggest 1200 mm/.min as a base in carbon fiber with his bit. cnc cant handle 1200 goes way off part
Need more input like:
- bit used unknown
- diameter and flutes unknown
- RPM unknown
- depth per cut unknown
- what material Carbon fiber, how thick? How is it held down?