Hello,
I just removed an anillam control from an lagun mill and installed the following:

1. Viper 200 from Larken for X,Y,Z
2. 3 USD 500 cpr encoders
3. Bob Campbell's BOB
4. Mach 3 software

If I set a zero, walk away an inch, and then walk back my machine is off 02" to .04". It does this on all axis and is cumulative. I have tried playing with the pulse settings and switching to a different BOB and no Luck!

Has anybody experienced this problem before?

Brandon