First layer calibration on textured sheet
Hi All, I've had my Prusa MINI+ for over a year now. Love it, very few issues, mostly general 3D printer stuff. I'm a bit unsure how to proceed with this issue however.
I have recently received a textured sheet, and understanding that this is a different thickness to the smooth sheet I have selected the textured sheet profile and started a first layer calibration. For some reason, no matter how low I set the z offset, it is never close enough to the sheet to lay down any filament - even on the maximum of -2.000.
Any suggestions on how to proceed? I've done a bit of googling and see mentions of repositioning the PINDA, but I'm a little wary of going ahead with this without a bit of confirmation that this is the approach I should take from a more official source.
Thanks in advance
Best Answer by fuchsr:
Textured and satin sheets are about 0.4 mm thinner than the smooth sheet, so your live z would be about -0.400 more negative. If that pushes you over -2.00, you should position the PINDA sensor higher. Higher, because that way it can move closer to the sheet before it triggers and thus less downward adjustment for the nozzle is needed.
It's very easy to do. Just loosen the screw that holds the PINDA in its holder, and move it up slightly, before securing the screw again. Also see
Mini: https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mini-mini_179912
Mk3S: https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mk3s-mk3s_179920
There's also a gadget that can be used to get the PINDA positioned properly https://www.printables.com/model/57192
Works better than zip ties or credit cards, which have less well-defined heights. But of course it needs to be printed first.
RE: First layer calibration on textured sheet
Textured and satin sheets are about 0.4 mm thinner than the smooth sheet, so your live z would be about -0.400 more negative. If that pushes you over -2.00, you should position the PINDA sensor higher. Higher, because that way it can move closer to the sheet before it triggers and thus less downward adjustment for the nozzle is needed.
It's very easy to do. Just loosen the screw that holds the PINDA in its holder, and move it up slightly, before securing the screw again. Also see
Mini: https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mini-mini_179912
Mk3S: https://help.prusa3d.com/en/guide/how-to-replace-superpinda-mk3s-mk3s_179920
There's also a gadget that can be used to get the PINDA positioned properly https://www.printables.com/model/57192
Works better than zip ties or credit cards, which have less well-defined heights. But of course it needs to be printed first.
RE: First layer calibration on textured sheet
thanks @fuchsr that's very useful. From memory my z is something like -1.735 normally, so that maths seems to work.
The pointer about the "gadget" is particularly helpful, I can print that on my smooth sheet before I go fiddling with the PINDA.