Petg first layer adhesion problem
I just got my MK4 a few weeks ago and got comfortable with PLA so I thought I would dive into PETG. I switched my bed to a textured PEI and away I went. I have been having a terrible time getting the first layer to stay on the bed. I set my bed temp to 85 and nozzle to 245 (I ran a temp tower and the tower came off the bed at 240). I have washed the bed with soap and water and then cleaned with IPA. I ran a 1st layer test with nozzle at 245 and bed at 85. I have attached a photo which to me looks like part of the bed has an issue. Should I try cleaning again? I have not printed anything put PTEG on this sheet. I'm using Numaker PTEG and it's the only roll I have at the moment. Any suggestions would be welcome including if you have any experience with Numaker. Thanks, Doug
There is a chance you have a really stubborn grease spot (it happens with laundry too - some stains survive ordinary washing) - that sort of pattern does sometimes occur with fingerprints ...
I would try a drastic wash - rub neat dishwashing detergent into the build sheet, wait ten minutes, then wash clean with very hot water.
Cheerio,
RE: Petg first layer adhesion problem
Thanks,
I will give that a go. I think I'm going to also mark each side so I can tell them apart.
RE: Petg first layer adhesion problem
Thanks to Diem my problem is no longer! I took the textured sheet and scrubbed it with soap and water again this time using a Scotch 3m green sponge with abrasive side using a little pressure. Let it sit for a bit and then rinsed with hot water and then did a final rinse with RO filtered water. My layer test was perfect!