David, I am having trouble with Z height reliability. I am using your Z IR probe, I have a slightly tinted glass heat bed approx. 6mm thick. I have placed a piece of black paper under the glass at my home location. I test it by homing the printer then entering G1 Z0 and most of the time the Z gap is tight against the glass (to tight to print first layer). I repeat the procedure with G92 Z0 after adjusting the Z gap then runG30 S-1 and enter value in M558. Is there anything I can do to improve this.
I am running 2.02
M574 X1 S0 ; Define active low and unused microswitches
M574 Y2 S0
;M574 Z1 S1
M558 P1 X0 Y0 Z1.297 H0 F500 T3000 ; Set Z probe type to modulated, the axes for which it is used and the probe + travel speeds
G31 P500 X0 Y0 Z 1.1 ; Set Z probe trigger value, offset and trigger height