coming unstuck with Benchy model - advice needed for newbie
Hi all,
I finished assembling my 3i Mk2 kit earlier this week and think I have got it set up fairly well.
I seem to be having problems printing when I get part of the way through a print, about 3mm up, when the model becomes detached from the bed.
I have thoroughly cleaned the bed, raised the bed to 65 deg C with PLA.
I have slowed down the print speed for the first couple of layers and the PLA seems to stick initially but then about 3mm up it detaches and I get a worm of extrusion.
Any help would be very welcome.
Paul
Re: coming unstuck with Benchy model - advice needed for newbie
Print the pre-sliced Prusa logo from the SD card. While the first layer is printing, check that it is getting a good "squish". If not, lower the nozzle using Live Z Adjust.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: coming unstuck with Benchy model - advice needed for newbie
Thanks for that I will give it a try.
I have the Z setting to -2.0mm and it still does not seem to squish.
What are typical Z settings?
Paul
Re: coming unstuck with Benchy model - advice needed for newbie
Your P.I.N.D.A. probe has to be too high up. The handbook says you shouldn't exceed -1.00 for the Live Z Adjustment. Move it down more and run another Live Z Adjustment.
Re: coming unstuck with Benchy model - advice needed for newbie
OK, I have re-set the nozzle just touching the bed and a 1mm feeler gauge to set the PINDA. I re-ran the XYZ calibration which was OK
I then ran a large test piece and found that a good Z setting to squish the filament was about -.5mm
I then went to try printing the Prusa Logo and it is almost as it the printer has ignored my -.5mm setting as the first layer doesn't squish and rapidly come unstuck.
I realised when I bought the printer that there would be a lot to learn but dismayed that I can't even get one simple print right.
Paul
Re: coming unstuck with Benchy model - advice needed for newbie
Hi again,
I think I may have cracked the problem. I was running the test piece but aborting the print when I had the Z setting correct and because the print didn't get to the end it didn't store the Z value.
I then used the Prusa slicer to amend the settings to print Marvin using brims & rafts to help stick. I also slowed the first layer.
My print has come out well so am very happy and delighted with my 3i Mk2.
Paul