Hi everyone

As the title explains I am losing steps on all axis; .5mm using 1/4 micro stepping after a 10,000 lined program. The error only reduces (but still present) if I mico step down to 1/8 or 1/16 and of cause becomes a higher loss if i step up to 1/2 stepping.

I think I have read every post covering this issue over the past 6 weeks and tried every possible fix, a short list follows:

Reduced motor velocity & Acceleration cross various ranges to almost zero.
Changed the kernel speed.
Tried Sherline.
Been over the PC for hidden programs and run tests, disabled the tool path preveiw.
Tried all pulse widths.
Checked all wiring many times.
Checked voltages.
Tried backlash compensation.
No mechanical binding.

This has always been the same problem from day one, any changes or tests still leaves me with the same consistent missed steps?

I am wondering if ordering another BOB would be the next step as I do not have a scope for testing, ideas anyone??? :drowning:

3 axis CNC
CNC DB25 breakout board
Nema23 249oz stepper motors
CW230 3A drivers
350w 24v pwr supply
Desk top PC Intel Celeron 1.70GHz 224MB Ram
XP 2002 service pack 2
Mach3 R3.043.022

Thank you