[575] Hi, i have this card and sometimes i get missteps randomly. i have turned vfd off completly and its not interferance, i dont know how to replicate it but it seems like disconnecting and reconnec

This could be a lot of things, but here are some things to consider: - Change the USB cable. If the cable is very long, consider using a USB cable with repeaters built-in. - Make sure the missteps are not caused by insufficient power. The stepper motors could be stalling. A way to make sure you are within the safety factor for stepper motor power is to reduce the acceleration and velocity under Mach3's motor tuning. - Although you've ruled out VFD interference, other sources of electromagnetic interference might be present. Try moving cables away from potential sources. If signal wires are close to stepper motor wires, this absolutely will cause problems with steps. I am soon going to do some videos on shielding and problems with crosstalk. - Make sure not to use other programs on the same computer that is used for the CNC while the CNC is in operation. - If possible, try running your setup on another PC to rule out computer-specific issues. - Ensure proper grounding of all components in your CNC system. Additional Information: Thank you for the response, so i have tried different pcs no luck, w10 64 bit on both, the cable is not the problem too, i have found this though, sometimes it runs none stop but still no guarentee what will happen. sometimes the machine completly stops for a second and continues without missteps and sometimes it stops for a milisecond and missteps. Even when probing tool lenght!