I'm thinking you are correct about the offset not working with immediate homing. No matter what combo I tried I could not get the machine coordinate to be anything other than 0.00.
If I add a home switch and set the home offset to 14 I wonder if it would set the machine coordinate to 14.00. I don't need a switch but that is a ton easier than fixing a lot of code.
I am pretty sure that immediate homing _should_ set straight to HOME_POSITION.
I am away from any linuxcnc machine or a ew days, though, so can't test.
