My machine keeps saying soft limit

[MikeyH (Mike Hembrey)]

@thelmuth is right, the rotary has infinite limits in the Yaxis. It also has no limit switches, so you have to turn off the Home parameter ($22=0) and soft limits ($20=0) if turned on. In Lightburn, you need to turn off the Auto-Home on Startup.

I made Macros (“Yaxis Mode” and “Rotary Mode”) to take care of the GRBL parameters.

Take a read at this, it may help.

Setting up a Rotary Chuck or Roller

I now have both a Chuck and a Roller rotary unit. I have done some testing in an effort to make some sense of the needed settings. The Chuck rotary is an xTool RA2 Pro and the Roller rotary is an Atezr KR. Both machines used are the Sculpfun S30 Pro and the SF-A9 (GRBL controllers). Because most rotary units use the same size stepper motor, this information may be relevant to nearly all setups. But no warranty. I will not get into all the stuff you have to switch when attaching the rotary here.…