Capacative NPN Z-probe won't invert value
I am having problems configuring my Z-probe setup. I connected an NPN conductive probe to the z-probe connector using a silicon diode as instructed here: https://duet3d.dozuki.com/Wiki/Connecting_a_Z_probe.
The LED on the probe triggers and the value in the web interface as well. When not triggered the value is 1000 and when triggered it goes close to 0. M588 I1 does not change anything, what am I doing wrong?
Is this M588 typo or... Well, correct command is M558. And depends on firmware, I1 works only for firmware 2.x, if you have 3.x then https://duet3d.dozuki.com/Wiki/Gcode#Section_M558_in_RepRapFirmware_Num_3
Thanks for the quick reply! I am running firmware version 3.1.1.
I put a ! in front of the C parameter but it didn't change anything for me.
How does your M558 line looks like ? I mean in config.g
Probe section looks like this:
M558 P5 !C"zprobe.in" H5 F120 T6000 ; set Z probe type to unmodulated and the dive height + speeds
M558 H30 ;*** Remove this line after delta calibration has been done and new delta parameters have been saved
G31 P500 X-13 Y35 Z2.5 ; set Z probe trigger value, offset and trigger height
M557 R85 S20 ; define mesh grid
Should be like this:
M558 P5 C"!zprobe.in" H5 F120 T6000
Thank you! That solved it.