backlash mack3

[h4ppy-chris]

Phil why don't you use backlash compensation to get rid of the 0.05mm?
i had 0.5mm now got it down to 0.02

[M250cnc]

Phil why don't you use backlash compensation to get rid of the 0.05mm?

I did try but the machine in my mind didn't benefit, it sounded weird.

Parts i make come out perfect for me, so in my case it wasn't worth it. I also have a manual Bridgeport i can get better accuracy on the RF31 a lot easier.

All machines have some backlash, especially on a hobby machine if you think you have Zero backlash then you are not measuring correctly.

There is no substitute for almost zero backlash, software will do a job on small cuts but if you are taking big cuts with large amounts of backlash the cutter is going to be drawn in (Snatch) when climb milling and the potential is to lose position.

Also when climb milling with ballscrews the cutter is moving the table and the stepper is controlling the movement so you do not need as much stepper motor power.

When conventional milling the stepper has to fight the forces of the cutting action so you need a powerful motor.

Chris i know you have a mill already and you can tell how much extra force you need when manual milling in the conventional direction. You also get the best finish with climb milling.

Phil