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Help, I'm not sure what is wrong  

Pablo Lereu
Active Member
Help, I'm not sure what is wrong

Hey Guys. I am hoping you can help me.

I was having trouble with a print and was getting crash detection. Noticed that Pinda was hitting the print. So I decided to raise Pinda a bit and run the whole calibration wizard again.

As the calibration wizard was running, the Z axis ended up hitting the PEI sheet squishing the nozzle and placing a small dent into the sheet. I stopped the calibration and adjusted Pinda.

The next calibration went smoothly and all was good.

But now that I am rerunning the First layer Calibration, i am getting small blobs on the layer. I have never had this before. My first layers before this whole fiasco were perfect.

I am wondering if I may have damaged the nozzle when I squished the bed or if it ay be something else, like the extruder itself being damaged.

Thanks for the help.



Posted : 25/06/2019 7:52 pm
Illustrious Member
RE: Help, I'm not sure what is wrong

Z-Offset is too low; you need to make it more positive.  

Essentially, your first layer is being printed too thin.


ps: and your bed looks like it needs a soap and hot water wash... there are a lot of fingerprints on it.

This post was modified 2 years ago by --
Posted : 25/06/2019 7:58 pm
Trusted Member
RE: Help, I'm not sure what is wrong

Hi Pablo

You probably have this sorted out but here a some things to try.  First unmount the PINDA probe and turn ON the printer.  Move the probe to the bed, did the light come ON?  If so place a tie wrap on the bed, at the thin spot on the tie wrap rest the probe on the tie wrap perpendicular to the bed.  Did the light come ON?  If so no worries.  Remove the build sheet and repeat the steps in the prusa build instructions for setting the height of the probe and first time calibration.  Concerning the crash you should be OK.  You may want to verify your E-Axis and build plate screws have been tightened prior to calibration. (don't over tighten, finger tight should do it)

Posted : 28/06/2019 11:15 pm