Tried textured sheet -> no success in first layer calibration
 
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Tried textured sheet -> no success in first layer calibration  

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Kritten
(@kritten)
Active Member
Tried textured sheet -> no success in first layer calibration

Hi, 
I already successfully printed 50+ hours on my smooth sheet with the noozle height something about -16xx.
I now wanted to try the textured sheet and run the first layer calibration.
But even if I calibrate the nozzle height to -2000, which is the minimum/maximum, I get this result:

It's a bit blurry, but the holes in the lower left are clearly visible.
What can I do in such a case?

Posted : 24/03/2021 7:04 pm
Jimbo
(@jimbo-3)
New Member
RE: Tried textured sheet -> no success in first layer calibration

I have the same issue with textured sheet. At -2.000 I still can't get the nozzle close enough to the sheet.

Posted : 30/03/2021 5:05 pm
JoanTabb
(@joantabb)
Moderator
RE: Tried textured sheet -> no success in first layer calibration

the textured build plate is measurably thinner than the smooth plate, so it's likely that you are running out of Live Z adjustment...
I suggest that you Reset your live Z to 0.00mm
auto home your printer, put a sheet of paper on the build plate, turn the power off (this de energises the Z motor)
then lower your nozzle, by turning the Z axis lead screw, until the nozzle just touches the paper (moving the paper will show resistance...) now check the height of the Pinda/Minda/Supapinder.... what ever you have... and you will probably find it is very close to the heat bed... 

try sliding a Prusa cable tie or credit card, between the Pinda/Minda/Supapinder.... and the build plate. the gap will probably be too small, 

Loosen the clamp screw on the Pinda/Minda/Supapinder clamp, and move the Pinda/Minda/Supapinder.... upwards a little (Note the screw thread on the Pinda/Minda/Supapinder has a 1mm pitch, so if you move the Pinda/Minda/Supapinder up by 1 thread (Often felt as a click if you raise the Pinda/Minda/Supapinder instead of screwing it( Screwing may stress the cable))) and tighten the clamp, then recheck with the cable tie/ credit card... 
If all is well, re power  the printer, raise the Z axis using the LCD Menu, then auto home again... there should now be an appreciable gap between the nozzle and your paper... 

now re adjust your live Z... 

the Prusa method is available at the link below
https://help.prusa3d.com/en/guide/how-to-adjust-the-height-of-the-m-i-n-d-a-sensor-mini_154547

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 30/03/2021 8:04 pm
Jimbo liked
jkbecker
(@jkbecker)
New Member
RE: Tried textured sheet -> no success in first layer calibration

@joantabb

Thanks Joan, I came here with this exact problem and that solves it perfectly.

Posted : 03/04/2021 8:26 pm
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