Hi all, I have a RF-31 mill which I have used for quite a few years as a manual machine. Recently I converted the machine to cnc via the cnc masters retrofit kit. After all the expected teething dramas I got the machine working well and was quite pleased with the practice pieces I was doing on the bakerlite panels I acuired. However when I moved to working on aluminium I encountered problems with inconsistency in cuts. For example if I made 10 identicle cuts of a 1mm depth using a 10mm end mill I'd get to the 3rd or 4th cut and it looks as though the tool has been pulled in on a 20-30 degree angle then the following cuts appear to be ok. I use climb milling technique with hss four flute end mills. Ive checked the quill for play but there doesnt appear to be much there. Any help would be fantastic. While Im here does anyone have a RF-31 manual I could get a copy of Ive been looking for one now for ages without any luck, thanks guys