Build Your Own SLA/SLS

im not sure, but it seems the variable H just indicate the home position, in this case 0. it not send any command to execute, like g1, g28, etc ... anyway, had you tried send the command via manual gcode window¿?

i think is better to adjust z0 before press play button.

When i send $h via manual code it goes limit switch and zeroing coordinate then start process.

;********** Header Start ********
;Here you can set any G or M-Code which should be executed BEFORE the build process

i think its self-explanatory

I know i read that.

I write $H ;Go home and zero Z axis but
After slice, at g-code view .0 ;Go home and zero Z axis

Why "$H" turn to ".0" it is basic question and problem?

PacManFan what do you think about it?

Really thank you i wll try that.

Best Regards
Cihan