Mini height Sensor not triggering

[Dave Parry]

I have a duet 2 board and a dc mini height sensor.
I have not used it in a little while but now I'm getting Height sensor problems when I try to calibtrate it, if I send either G30 S1 or use auto calibration it, although the red light comes on, the carriage doesnt stop and hits the bed and I have to use emergency stop.
My config.g is
M558 P1 C"zprobe.in" H8 F120 T2400
G31 P500 X-0 Y-0 Z2.16;
I do also get z probe display info on the screen. 6 or 7 when far away and 500 when near the bed.
how do I get it working?
My software is
Duet Web Control 3.4.5

[droftarts]

@Dave-Parry The probe trigger is set to 500 by G31 P500 ... , so if it is not reading over 500, it won't trigger the probe. So try a lower probe trigger value. Also see https://docs.duet3d.com/User_manual/Connecting_hardware/Z_probe_testing for static and dynamic testing, so you don't run the probe into the bed.

Ian

[Dave Parry]

@droftarts Thanks, That sorted it. Although it does seem to exceed 500 normally, I have set it to 490 and it works fine