steppers or software

[dchutchins]

I just got done building my new controller box for my spectralight/Sherline lathe & got most of the Mach3 setup. In manual mode, I set jog to incramental of .010 & when running the axis back & forth with an indicator. I get iratic readings, meaning the step are not consistant every time. I have set the backlash. I am starting to think one of my steppers is bad (X-Axis) & maybe the z axis is going. It gives me between .009 - .011 for each step in iether direction. These are the original round steppers.

Or....Am I missing something in the software?

Anyone else experience this themselves?

Dave

[Hood]

Are you using Sherline mode?
Hood

[dchutchins]

No, I tried the shirline mode once before & it produced some straing things, but I did change a few other things since then. I'll try the shirline mode again.

Thanks,
Dave

[Hood]

If you are using sherline drives then you will definitely need it, also quite a few of the hobby drives require the wide pulse it gives. Make sure your kernel is set to 25KHz also as it is unlikely you will need more with steppers.
Hood

[Overloaded]

Hi Dave,
 Instead of running the axis + then - to check the accuracy, run it in the same direction multiple steps to eliminate a possible backlash entry error.
Also, what is the resolution ? If it is quite coarse, it could be rounding up or down to the next step increment.
The DRO should read in 4 decimal places, what are your exact readings ?  0.?
Russ