DM556S causes ghosting while M542C does not

Hello Cloudray forum

I recently replaced the X and Y stepper drivers on my 80W CO2 laser with two new DM556S drivers.

My setup:

  • Controller: Ruida RDC6442S-B
  • Motors: 57BHH51-280A-25C (2.8A)
  • Driver settings:
    • 5000 pulses/rev
    • 3.2A Peak / 2.3A RMS
  • Engraving speed: 300 mm/s
  • Power: 15%
  • Line interval: 0.10 mm

After installing the DM556S drivers I noticed ghosting/ringing during engraving.

To troubleshoot, I:

  • Replaced the drivers
  • Checked all mechanical components
  • Verified that the machine is mechanically square

The interesting part is that when I reinstall the original M542C drivers with the same machine settings, the ghosting disappears completely.

Because of this, I suspect there may be a configuration difference between the DM556S and M542C, even though both are set to 5000 pulses/rev.

Do you have any recommendations regarding:

  • Current settings
  • Microstep settings
  • Anti-resonance settings
  • Ruida compatibility
  • Acceleration settings

that could explain why the DM556S produces ghosting while the M542C does not?

Thank you for your help.

Best regards,

Jarle