Bittsetter on Shapeoko 4 Standard: Gantry won't move far enough on Y axis

While one can slightly influence where the origin of an axis is by adjusting the switch position, that shouldn’t be necessary, nor should it be needful to change the travel dimensions — usually when a machine falls short on an axis it is because the belts haven’t been calibrated, see:

Then reconfigure (but don’t re-send the Grbl configuration which would overwrite the calibrated values) and it should be possible to reach the BitSetter.

if not, let us know at support@carbide3d.com and we will do our best to assist.