I have just bought a 2 year old Pro cam CNC Router.
I think I have a problem with backlash but need some confirmation.
The machine has Redcom DC Servo's,HSD 9KW (12 HP) Electro Spindle,Swiss Rack and Pinion Drive and Linear bearing guide system. It is operated with a Centroid control panel.
The spec sheet say's it has a 30m/min cutting speed capability.
I have just upgraded from a SCM record 2 with ballscrews so maybe I'm expecting too much (I'm not tech savvy I should add!)
As the photos illustrate, I seem to be overshooting corners running at a feed rate of 4000mm/min cutting a 400mm x 400mm square. The "W" on the left in the second image was being cut at a speed of 1000mm/min (result not so bad) whereas the "W" on the right was cut at a speed of 2000mm/min and RPM 18,000. The base of the "W" is my issue.
I have been advised by the manufacturer that if I insert G61 I will have sharp corners. This I have subsequently established will only work on straight lines not arcs obviously and is extremely slow if I am cutting out a full sheet of squares 400mm x 400mm.
My work involves cutting all sorts of shapes out of different materials and was advised by the manufacturer subsequent to purchasing, that their machines are primarily made for the cabinetry industry.
My question is do you guys think that my problem is backlash or am I running too fast?
And secondly, is there anything I can do to either the machine or the parameters in order to get a happy medium for what I want to do with programs that contain both straight lines and arcs.
Any advice would be greatly appreciated.
Cheers