Trigger height changes when i swap nozzle

[PuddingBaer91]

Hi there,

I am using a smart effector. Yesterday i had to change my nozzle. I thought: cool no problem because i have the smart effector which probes by nozzle contact... So i will have no problems and no fiddling after the nozzle change. But after the change i noticed that the trigger height changed. Can someone explain why? I can't imagine because the nozzle is the probe... Or does the nut on the heatsink has an influence here?

Thank you guys

[Phaedrux]

@puddingbaer91 I would guess the geometry change may alter the sensitivity of the probe such that it's striking sooner or later than it used to. Or rather put the smart effector is now slightly different position compared to the bed so that the depth of the probe is slightly different.

Think of the smart effector and nozzle (and the entire assembly really) as a complete system. You've altered a portion of the system when changing the nozzle. So must now re-profile the system as a whole.

[dc42]

@PuddingBaer91, this surprises me. I would not expect the trigger height to change significantly, unless one nozzle had more "give" in it than the other, which I think would only be the case if it had a blob of filament on the end. But of course the homed height will be different, until you run auto calibration.

[PuddingBaer91]

@dc42 that's exactly what i assumed. So i not checked the height and just started a print. The nozzle scratched the bed
Maybe the full metal heatbreak is more yielding then the ptfe lined one.. That's the only part i switched with the nozzle. But i also can't imagine that this will make such a big difference

[PuddingBaer91]

Because of this abnormal and unexplainable thing i could not sleep anymore. I deassembled my effector and found the reason: when i put the heatsink back into the effector hole i not watched careful enough to my hot end fan wires. Therefore i clamped the black wire between the sink and the effector plate. OMG

Because of the elasticity of the isolation i got a different trigger height. Now i get my old trigger height. Reason found and explained. Now i can sleep like a baby again