false Triggers probe when hot end is hot

[gorf32]

With my smart effector it seems to work fine, probe good will do a bed mesh fine but only when the hotend is cool.
And if I heat up the hot end and try probing I keep getting false triggers and can not finish any probing while hot end is hot..

Any thoughts on what may be going on?

Thanks gary

[droftarts]

@gorf32 is the problem when the hot end is hot, or when the hot end heater is actually 'on' (ie heating)? If you try probing with the M558 B parameter set to B1, does that help? If it does, I expect the heater PWM is causing interference. If not, I would think that the heat is causing the Smart Effector PCB to expand, so changing the reading; try adjusting the sensitivity, see https://docs.duet3d.com/en/Duet3D_hardware/Accessories/Smart_Effector#programming-the-sensitivity

Ian