PETG on satin plate -- adhesion issues
Ever since I got the extra print sheets (satin and textured) for my Core One, I have struggled with adhesion problems printing PETG on the satin sheet. Small parts come off entirely, large parts peel off at the corners and may keep peeling throughout the print until they are halfway detached. The filament is dry and otherwise prints cleanly; the plate has been freshly cleaned with dishwashing detergent.
As a workaround I have printed small parts on the smooth PEI sheet, and have added massive brims to larger parts. But I now need to print a larger part where I don't want to use a brim. (Two halves of a cylinder which will be assembled; I want a clean seam there.) What else can I do to print them with good adhesion?
I have avoided glue etc. so far since I always felt it is a parameter that's hard to control and reproduce exactly -- should I give it a shot? (Any specific recommendations what to get?) Or should I get a CryoGrip plate?
I mean, this is just PETG -- it's supposed to be an "easy" filament, so I am hoping for a one-size-fits-all solution that takes the tweaking and failed attempts out of this equation. Or is that simply wishful thinking?
RE: PETG on satin plate -- adhesion issues
it almost sounds like you don't have the bed hot enough. can you share your gcode and/or a 3mf of your print? remember to zip them to post.
other questions that come to mind are "do you have the vents/door open?" "do you have the exhaust fans set to auto(if so what temp) or fully on or off?"
RE:
I mean, this is just PETG -- it's supposed to be an "easy" filament, so I am hoping for a one-size-fits-all solution that takes the tweaking and failed attempts out of this equation. Or is that simply wishful thinking?
Pick up the BIQU CryoGrip Glacier and ditch the satin sheet. I don't even ever have to clean them. I just wipe any debris off the surface. PETG sticks very well to it.
I only use 2 sheets now. The CryoGrip for pretty much everything and a G10 specifically for PC
RE: PETG on satin plate -- adhesion issues
I am beginning to think these satin sheets are a bit of hit and miss, I have no trouble yet with mine and I only clean it with IPA. The textured sheet gave me some issues with PETG until I learned to clean it using dish soap and then use window cleaner between prints, no IPA on the textured sheet. For large pieces I have increased first layer bed temp a notch and chamber temp when fighting warping on the textured sheet. But nothing special for the satin sheet. One trick I stumbled upon is that a print of tpu on the satin sheet gave it a really good clean once pealed off, that pulled everything off the sheet.
/Anders
RE: PETG on satin plate -- adhesion issues
it almost sounds like you don't have the bed hot enough. can you share your gcode and/or a 3mf of your print? remember to zip them to post.
other questions that come to mind are "do you have the vents/door open?" "do you have the exhaust fans set to auto(if so what temp) or fully on or off?"
I am printing with the default "Generic PETG" settings in PrusaSlicer, 0.15 mm Balanced. Bed temperature is 85°C, fans are on Auto. Since it is currently rather chilly (14°C) in the basement where the printer lives, I find that setting the vents half-open lets the chamber temperature come up to 30°C soon, then stabilize at the target temperature of 35°C.
The zipped .3mf file is attached (if the forum software plays along...) Thanks for taking a look!
RE: PETG on satin plate -- adhesion issues
I like my satin sheets. I apply a little Vision Miner Nano Polymer Adhesive and everything sticks very well (PLA, PETG, PA, PC, ASA, etc) and removes easily. It lasts for 15-20 prints, then I clean it with 90% IPA, reapply and print some more. It works well with textured sheets as well.
RE: PETG on satin plate -- adhesion issues
I like my satin sheets. I apply a little Vision Miner Nano Polymer Adhesive and everything sticks very well (PLA, PETG, PA, PC, ASA, etc) and removes easily. It lasts for 15-20 prints, then I clean it with 90% IPA, reapply and print some more. It works well with textured sheets as well.
Be careful with Nano Polymer and ASA on a PEI sheet. For larger parts you could end up ripping off the coating. Also if you print large(ish) PC and ASA parts I would recommend printing on a G10 surface with a rigid steel backing. Otherwise, I've had parts pull the sheet off the bed when cooling.
RE: PETG on satin plate -- adhesion issues
I don't use Nano Polymer on PEI sheets, in fact I don't use PEI sheets at all. I may just be lucky, but I have not had an issue with large PC, PA, or ASA parts on either my C1 or XL's.
RE: PETG on satin plate -- adhesion issues
I like my satin sheet, but it can be marginal for adhesion. I tend to print small fragile PETG parts, so if they're ready to fall off after the sheet cools, so much the better. Just don't let go until then! I clean before every print with IPA. I can envision having problems with larger prints. The grip on the PEI sheet is often a bit much and can damage the sheet with anything other than bog standard PLA. Even PLA blend is risky, but a glue layer seems to protect the sheet. I rub it quite thin.