Warning: the height map has a substantial Z offset

Phaedrux

@printingforfun said in Warning: the height map has a substantial Z offset:

proximity probe Omron 5mm

Does it have a consistent trigger height at all locations on the bed?

How are you measuring the trigger height?

If you use homeall and then command the nozzle to Z0, does it touch the bed, or is there a gap?

printingforfun

@phaedrux Does it have a consistent trigger height all locations on the bed?
Yes, the error Is marginal about 0.02-0.04max

How are you measuring the trigger height?
G30 S-1

If you use homeall and then command the nozzle to Z0, does it touch the bed, or is there a gap?
It's touching the bed, no gap, Z=datum is as set initially, Z0

I don't get it how or why does the extra +2.5-3.0mm difference comes from?
Just printed and crimped the wires for the duet IR probe and will mount it tomorrow, if that shows the same results, I'm gonna compile everything from scratch.... Thanks for your effort!
I see that I'm not the only one with this problem and dc42 moderator is puzzled by this and provided similar advice to no avail....

Phaedrux

And when you measure the trigger height you are putting it into G31 in config.g?

If you send G31 by itself, does it report back the same value?

Can you homeall, then move the probe to the center of the bed, and send G30 to probe. Then send G29 S0 to create a fresh heightmap and see how it looks?

What other thread are you alluding to?

printingforfun

@phaedrux And when you measure the trigger height you are putting it into G31 in config.g?
Yes

If you send G31 by itself, does it report back the same value?
Yes

Can you homeall, then move the probe to the center of the bed, and send G30 to probe. Then send G29 S0 to create a fresh heightmap and see how it looks?
Same, no change:-(

What other thread are you alluding to?
Just google: Warning: the height map has a substantial Z offset.... the first 5-7 results, I think the majority is from this forum... Don't get me wrong that guy dc42(I think) is for me number1 in anything related to Duet...

Phaedrux

@printingforfun said in Warning: the height map has a substantial Z offset:

Just google: Warning: the height map has a substantial Z offset.... the first 5-7 results,

Well the warning is telling you there is an offset. The reason is usually a misconfiguration or order of operations out of whack.

Can you make a video of the process so we can see it in action?

Norder

@printingforfun
Have you ever tried to reduce the immersion speed of the probe when measuring?
If the speed is too high, some probes may supply incorrect values because the motors cannot stop as quickly.
So I would suggest switching from F400 to F200 for testing purposes.

M558 P5 C"zprobe.in" H9 F400 T6000 ; set Z probe type to unmodulated and the dive height + speeds

printingforfun

@norder already tried that with less than half of the speed that I have.... F160