G-code to determine probe offset

[chderycker]

Hi,

I have a Kossel mini with auto leveling now the nozzel is the prob itself can somebody explain to me how i determine the offset between Z-0 and the probe.

Gr.

Christoph

[mhackney]

Christof, what kind of probe are you talking about - using FSRs or something else?

With probes that use the nozzle as the contact point, there usually is not an offset for Z=0 unless there is flex in the system or the probe trigger needs to be taken into account. The way you figure this out depends on the probe and the firmware you are using as they are all different.

[chderycker]

the nozzel is touching the glass and is flexing till the end-stop is triggered.

Firmware i'm using is Marlin.

Gr.

[mhackney]

Still not enough information. Is the nozzle the probe or do you have a separate switch like the original mini kossle probe that used and Allen wrench?

[chderycker]

See here: https://www.youtube.com/watch?v=e119OXzkk7s arround 2 min of play

No additional probe, the nozzel is the probe.

[mhackney]

Ok, so your Z offset is whatever distance it takes to trigger the switch since the nozzle actually does have to move a few mm to activate the switch. the way to figure that out is to:

1) use the paper test to set the nozzle test to Z=0. However, on this sort of probe you have to be very careful not to depress the nozzle/switch or it will throw off the next step
2) then jog down until the switch triggers. the distance you jogged will be your Z offset

[chderycker]

thnx will try