The spindle's RPM and move speed were selected to give a chip load of 0.015, which is what I use with MDF. The 0.50 inch cutter and shallow cut depth were chosen to factor out cutter flexing. The test was run twice, once with the cuts going in the conventional direction and once in the climb cut direction:ДЁ-sided polygon with each side 2-inches in length Vacuum hold-down (I could not physically move the material even when using all of my significant weight.) I ran a very unscientific test with my Alpha.Д .500 inch 2-flute straight cutter (new) is he right?Д¬uts appear poor due to the visible vibration and look very-poor in comparison to our other machine, a 20yr old Wadkin 4-head CNC. Incidently my collegue here who put the machine together has convinced himself he is not at fault and the problems lie with the design of the machine. WHat can I do to rectify the problems? I won't be doing it as I am not the most DIY-minded of people, but I can pass the suggestions on to someone who can. No doubt this is showing up in my cuts, particularly diagonals which is what made me check it out in the first place. I can move the side with the motor on it by about 0.005' in either direction (same as the others) but the side without the motor can probably be wiggled side to side by anything up to 2mm!

Secondly, the Y carriage appears to be either very poorly designed, or the guy who assembled the machine here did a poor job of putting it together. I checked the set screw on one of the X motors - it seems to be very tight - I tightened it as much as I could anyway yet I can still very slightly move the gear without moving the shaft. I did the 'gantry wiggle' test and registered about 0.005' of movement. I seem to have a few problems with my machine, a PRT.

Cnc usb controller jerky movements