So I bought this laser back at the begining of the year. 600x900mm work volume 90w RECI tube Ruida RDC6442S-B control.

It had no name stepper drivers running at 24v that could not reliably move the laser head back and forth, way to many lost steps.

After fighting with the builder for 6 months gave up and installed 2 Stepperonline DM542T digital drivers with a 48v PSU.

That seems to have solved the lost steps issue, I have been unable to cause any steps to be lost under normal operation upto 500mm/sec scanning. (500mm/sec raster engraving always caused lost steps.)

But I have a new issue, I am certain it is just a setting somewhere in the Ruida controller as the problem did not happen before replacing the stepper drivers.

When raster engraving the laser seems to activate early in each direction while scanning. The below picture has various speeds with outine fill engraving.

For scale the vertical section of each engraving is .400 inches.

I am pretty sure I could adjust this in Lightburn, but would rather make a permanent fix in the Ruida Controller.

Help!