Strange behaviour: Lower power at low cutting speeds

[thx]

I was cutting some thick material so had the speed very low (8 mm/s) and power at max. The tube was only pulling 10mA instead of the 25mA it should have at max power and so wasn’t cutting through the material.

When I brought the speed up to 15 mm/s it was pulling 25mA as it should.

The power was continuous (long, straight cuts).

I never cut this slow before so don’t know if it’s normal for the power to be adjusted when cutting at low speeds. Is there a setting that controls this? I went through the machine settings but didn’t see anything relevant.

These were the cut parameters:

[LightBurn (Oz)]

Ruida / LightBurn won't cut below 10mm/s

This isn’t a LightBurn issue, but a Ruida one that’s quite common. There’s a controller setting called “Start Speed” that defaults to 10mm/sec. At that speed, power starts ramping up from Min Power to Max Power. Cutting at or below that speed means you’re using Min Power only, so if you’re cutting slow, set both Min and Max power the same and you’ll have no issues.

[thx]

Thanks. It was doing the same thing in RDWorks so I didn’t think it was an LB issue. I’ll try changing that parameter…