Missing Steps Poss TB6600 Fault

[jagmeetk22]

This is issue is due to low speed optocoupler .

Replace Direction and Pulse(CLock) optocoupler(p817) with 6n137 optocoupler.

This will solve problem and not loss steps.

[jagmeetk22]

Solution :-

It user P817 optocouplers which is low speed.
We need high speed optocoupler like 6n137.

Replace Direction and Pulse(Clock) optocoupler with 6n137 optocoupler then it will not miss an step.

Hi, i am new here and i am hoping you may be able to help me. I have built my own cnc router and it is working but i am losing steps on all of my axis. I have tried changing and making various designs of anti backlash nuts. I have also tried adjusting amp settings and step settings from 1/8 to 1/2 steps. It is more pronounced on z axis. when doing a project of a v carving i can end up being as much as 3.4mm above the work piece at the end. I am now beginning to suspect that my tb6600 drivers are at fault because when the machine is running the alarm light is continously flickering during the machine is running. I am wondering if this could be resulting in the loss of signal which is then resulting in lost steps. My machine is

4x Nema 23 stepper Motors bought second hand. (ebay)
4x TB6600 stepper drivers (ebay)
M10 x 1.5 Leadscrews
24v 10a DC PSU
5 axis breakout board (ebay)
Mach3 version 3.042
Dell Laptop with power management turned off running xp
Chinese Quiet 400w DC Spindle.

Cheers Neil