Re: [CAD_CAM_EDM_DRO] Profiling circle errors

kadeshan wrote:

>I just got my machine up and running. It has 360 oz/servos coupled 2
>to 1. Running mach 2. I am generating the cam from visual mill.
>When I profile a circle, its not one smooth motion, its like little
>tiny jerks. Where is this coming from. The encoders are only
>250cpr, is this the cause of it? I am stumped otherwise. Thanks for
>your time.
>
>

What is the native resolution? 250 cycles/rev gives 1000 counts/rev.
With a 2:1
reduction to a 5 TPI screw, that's 5000 counts/inch, or .0002" per count.
How is the circle coded in G-code? Is is a long string of G01 (linear
interpolation)
moves, or a couple of G02 or G03 circular arc interpolations? If it is
a long stream
of G01 moves, that is your problem. Get a better CAM program that will
generate arc
moves (or enable that function, if it is disabled.)

Jon