Z offset and Octoprint in a toxic relationship  

RE: Z offset and Octoprint in a toxic relationship

There are a few issues specified here, so can you detail this question?

RE: Z offset and Octoprint in a toxic relationship

There are some known issues with the Mini firmware that cause Live-Z drift when calibration is done at different temperatures. My understanding is that Prusa is aware of this issue and is expecting to release a firmware fix in the near future. Search through the many existing discussions on this topic for more info.

RE: Z offset and Octoprint in a toxic relationship

@bobstro

Thanks! just wanted to be sure it was not am isolated issue. 

RE: Z offset and Octoprint in a toxic relationship

A rumored intermediate "fix" is to let your hotend get up to temp and then wait a few mins for the MINDA temperature to stabilize. This makes sense and worth a try, but alas, there are a few things that don't compute for me here.

RE: Z offset and Octoprint in a toxic relationship

With the original Mk3, the PINDA probe needed to be consistently warmed to 35C to get reliable readings. This was addressed in firmware and with the release of the PINDAv2 probe. With the Mini, the MINDA probe seems to have similar temperature sensitivities. Many have reported success by allowing the MINDA to warm up for a few minutes before doing mesh bed leveling. Interesting, looking at the Prusa GitHub issues page, it sounds like letting the MINDA cool between prints is the key. Prusa is apparently working on incorporating a fix into an upcoming firmware release. Anybody interested in the details might want to look at the GitHub pages.

RE: Z offset and Octoprint in a toxic relationship

@bobstro: Awesome! Good to hear that this is more than just a rumor I heard on the interwebs. Cheers!

RE: Z offset and Octoprint in a toxic relationship

Posted by: @derenma

@bobstro: Awesome! Good to hear that this is more than just a rumor I heard on the interwebs. Cheers!

Well, it's a confirmation from a random guy on the interwebs for what that's worth. 😀 

The github page has the "non-fake" news.

RE: Z offset and Octoprint in a toxic relationship

Posted by: @bobstro

Posted by: @derenma

@bobstro: Awesome! Good to hear that this is more than just a rumor I heard on the interwebs. Cheers!

Well, it's a confirmation from a random guy on the interwebs for what that's worth. 😀 

The github page has the "non-fake" news.

But it is confirmation just the same.  LOL!

RE: Z offset and Octoprint in a toxic relationship

@derenma

Yes sure:

1. Z offset is inconsistent (looks by the responses it's related with MINDA and how it responses to temp changes)
2. Z live adjustment is not working when using Octoprint.

Thanks!

RE: Z offset and Octoprint in a toxic relationship

@mkb

Are you setting Z offset in the slicer and on the printer? I may be wrong, but this could be part of your issue. I'd suggest leaving the z offset at 0 in slicer and adjusting it on the printer.

With the default Octoprint set up you cannot access the printer settings, but if you set the live Z before starting the print from Octoprint it will remain at that level for the print. Personally I've added the gcode that pre-heats the minda before starting the print and I've not had to change the offset for months.

RE: Z offset and Octoprint in a toxic relationship

This is a real problem that I've run into as well, would be curious to hear solutions that anyone has come up with. I'm currently using Octoprint to level the bed, and then going back to printing directly from the machine because it is respecting the live-Z adjustments.

RE: Z offset and Octoprint in a toxic relationship

I don’t have the printer anymore. But I solved the issue after update to the Super PINDA sensor. If you have the first revision of the Mini I will recommend you to update your PINDA. Cheers.