I am running a 6550-PRO with LightBurn. I installed a new YoraHome Control box and the X-axis works as it should. However, the Y-axis runs backwards. Press the forward arrow and the Y goes back, press the back arrow and the Y goes forward. I have checked the wire connections and they are correct. Is the something in GRBL settings that need changing?
NOTE; I think I found my answer. Looks like I need to set $3=2.Going to change that when the current burn is done.
YUP!! That fixed it.