Quote Originally Posted by Davek0974 View Post
Having just got my first CNC table up and running, has anyone got any practical advice on axis tuning in mach3?

i have no idea of what speed or Acceleration G's to Aim for in motor tuning.

its only a small table, I have a work envelope of 650x680mm to play with.

any tips or tricks?
Unfortunatly Dave motor tuning is quite specific to each machine with many factors playing apart to what can be achieved.
Best advice is start low and work up and only raise one thing at a time, ie Velocity and test the affect.

The way I do it to get a ball park quickly is to double then half.? So say start at 2000mm/min on Velocity and 300s/s Accel.
Test and if ok double Velocity to 4000, test again. if too much then drop to 3000, test again. If ok raise to 3500 and so on.
Do the same with Accel but just be aware you can't have high velocity and high Accel so start with Velocity and find the limit where motors stall then back off 25%. Now do the Accel in same way and you should be in a nice balance. Just tweak from here to get the best performance.

The figures I've quoted are just guide lines and the volts you are running the machine motors/drives and the pitch of the ballscrews etc will determine the starting speed. For instance with only 24-36V and cheap drives on 5mm pitch screw then you may well be near the limits at those starting speeds I quoted.?

Give some info on your setup and will be able to give a better idea of a good starting point.