Broken after not even a day - Hardware, firmware and software help

Production on full speed

Apple-1 — Thu, 28 Oct 2021 19:48:15 +0000

Halloween production at full speed now – thanks to the community:

FoxRun3D — Thu, 28 Oct 2021 13:01:42 +0000

See also @bobstro's explanation in an older thread:

It's important to realize that Live-Z only impacts your 1st layer. You are setting the zero position for the nozzle above the print surface, the initial gap. After the 1st layer, every other layer is adjusted upwards from that level by your specified layer height. This means that adjusting Live-Z after the 1st layer won't affect other layers other than problems if the part becomes detached due to poor adhesion.

https://forum.prusa3d.com/forum/original-prusa-i3-mk3s-mk3-how-do-i-print-this-printing-help/everything-prints-good-except-first-layer/

FoxRun3D — Thu, 28 Oct 2021 12:52:54 +0000

The height of the next layers is defined by your chosen layer height.

One last thing

Apple-1 — Thu, 28 Oct 2021 12:09:25 +0000

Am I correct to assume that the Live-Z adjustment only affect the very first layer, i.e. a change of the Z-adjustment in the middle of the print does not do anything?

I am asking because my initial calibration of Z-axis now shows a totally solid area and I wonder if Live-Z-adjustment will "squeeze" more or less the following layers on top of the previous ones?

FoxRun3D — Thu, 28 Oct 2021 10:44:21 +0000

Glad to hear it worked. Sorry for the messed up link. Don't know how that happened.

RE: Pumpkin-ready

Apple-1 — Thu, 28 Oct 2021 10:02:12 +0000

Your method worked nicely. Z is now -1,3 and the rectangle is completely filled with no holes at all. I am now finetuning printing pumpkins for my daughter‘s Halloween party …

Thanks!

Apple-1 — Thu, 28 Oct 2021 08:23:56 +0000

Thanks for that! I will try your method today, because I really do believe that the sensor is too high and it never can hurt to get familiar with some procedures. Will write back later how it went. Printing your tool right now …

BTW: Your link did not work for me (it seems the forum software adds some parameters to links and the prusa website trips over them. The Link opens as

https://www.prusaprinters.org/prints/57192.#_ga=2.46593191.129294552.1635279972-1483798579.1634546895

where it should only read as https://www.prusaprinters.org/prints/57192

The Google Analytics (?) parameters make the link misunderstood by the prusa website.

Best

Armin

FoxRun3D — Thu, 28 Oct 2021 00:03:28 +0000

If you're close to -2, I would reposition the PINDA higher.

The Super PINDA should have about 1.5 mm distance between nozzle and SPINDA, so that you’re around -1 when your Live Z is correct.

Instructions for adjusting the PINDA are in Step 16 of https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mini-mini_179912

I put this little helper on Prusaprinters.org to help position the SPINDA: https://www.prusaprinters.org/prints/57192. Works better than zip ties or credit cards, which have less well-defined heights.

BogdanH — Wed, 27 Oct 2021 19:20:37 +0000

As long you get good first layer, any Z-offset value is good. If you'd feel more comfortable with value that's not that much on the limit, then move SuperPINDA a little up (max 0.5mm!) -then you'll have good 1st layer at about -1.4 Z-offset.
That "fat" first line on the edge is supposed to be that way -no need to worry about.

Thanks

Apple-1 — Wed, 27 Oct 2021 18:17:02 +0000

Thanks for your support to all of you.

All seems in order. I am printing now Benchy on PETG and so far it looks very good.

I was a bit doubtful because my calibration of the first layer is at -1.900 which I though compared very much to the numbers I saw online. But it all looks good.

Interesting, though: When a print starts and the first line before the real thing is printed on the one end of the base plate, that line is approx. double the width of everything that prints afterward. I assume this is normal behavior as the prints seem to come out very, very nicely.

Armin