PETG, 0,4mm nozzle 0,2mm layer height - keep adjusting, calbration off every second print
 
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PETG, 0,4mm nozzle 0,2mm layer height - keep adjusting, calbration off every second print  

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HainjeDAF
(@hainjedaf)
Eminent Member
PETG, 0,4mm nozzle 0,2mm layer height - keep adjusting, calbration off every second print

Hi,

 

I'm trying to print PETG but every second print fails.

I keep running the calibration. Started off at 1.200 mm but now olready at 1.500 mm adjustment en still wirey printed infill.

I'm using the PEI sheet.

I tried calibrating on the textured sheet, but even beyond 2mm still wirey infills. Gave up...

 

Posted : 02/05/2021 1:27 pm
HainjeDAF
(@hainjedaf)
Eminent Member
Topic starter answered:
RE: PETG, 0,4mm nozzle 0,2mm layer height - keep adjusting, calbration off every second print

BTW: using a MINDA sensor (waiting for PINDA)

Is it usual to have such large corrections on Z height?

Posted : 02/05/2021 1:33 pm
Rob
 Rob
(@rob-10)
New Member
RE: PETG, 0,4mm nozzle 0,2mm layer height - keep adjusting, calbration off every second print

I am having the same question. I had to adjust to 1650 mm to get working

Posted : 02/05/2021 9:59 pm
Etzeitet
(@etzeitet-2)
Active Member
RE: PETG, 0,4mm nozzle 0,2mm layer height - keep adjusting, calbration off every second print

This is likely due to the MINDA not being temperature-compensated. I struggled with the z-offset changing between prints.

The only real fix is to upgrade to the Super PINDA. However, a fairly decent workaround (which I use) is to pre-heat the probe before starting a print.

  1. Home your printer, so that the probe is fairly close to the bed.
  2. Pre-heat the nozzle/bed (using PETG preset).
  3. Leave it for at least 5 minutes.
  4. Start your print.

You can also add that to your slicer as a custom pre-print G-Code to avoid doing it manually, but it's only a few clicks of your Mini dial.

Posted : 02/05/2021 11:46 pm
HainjeDAF
(@hainjedaf)
Eminent Member
Topic starter answered:
RE: PETG, 0,4mm nozzle 0,2mm layer height - keep adjusting, calbration off every second print

@etzeitet-2

Well, I'm doing that, and also I moved the printer to an enclosed draftfree space to stabilize  it.

Goot to know that adjustments up to 1.5 aren't exceptional.

Posted : 03/05/2021 12:51 pm
cwbullet
(@cwbullet)
Member
RE: PETG, 0,4mm nozzle 0,2mm layer height - keep adjusting, calbration off every second print

@hainjedaf

I have found the same.  My Z shifts less in an enclosure.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 07/05/2021 3:04 pm
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