# DM556S causes ghosting while M542C does not

**URL:** <https://forum.cloudray.com/t/dm556s-causes-ghosting-while-m542c-does-not/1768>\
**Category:** CO2 Laser Cutting & Engraving\
**Created:** [June 12, 2026, 8:41am UTC](https://forum.cloudray.com/t/dm556s-causes-ghosting-while-m542c-does-not/1768 "2026-06-12T08:41:29Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![jarleaax](https://avatars.discourse-cdn.com/v4/letter/j/f05b48/32.png) [@jarleaax](https://forum.cloudray.com/u/jarleaax)\
**Post date:** [June 12, 2026, 8:41am UTC](https://forum.cloudray.com/t/dm556s-causes-ghosting-while-m542c-does-not/1768/1 "2026-06-12T08:41:29Z")

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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