You can see where around corners and even some straight runs it is peeling up. I’m running first layer at an agonizing 15 mm/s. Using hatchbox pla filament, just dried in dehydrator. 200° nozzle and 70° bed. The glass is freshly cleaned with soap and water, I just did several atomic pulls, I’ve trammed at different heights using a feeler gauge, and absolutely nothing is working. Any one have any ideas?
Looks to me like your offset is wrong, or your first layer height is too large
Seconded (or thirded?) I have a (textured) glass bed and my first layer is usually quite a bit more squished than this
I was able to get it printing, but doing some calibration confirms that adjusting z offset made the bottom layer better. What’s the point in z offset specifically, vs just changing the gap when tramming or the initial layer height?
Many suggest adding some type of adhesive to the surface, and I have a trick that might interest you. Glue sticks and hairspray are messy and are a pain to clean. When I used a glass bed, I kept about a tablespoon of sugar dissolved in little less than a cup of water nearby. One could use a paper towel to wipe a thin film over your glass bed. I did this as it warmed up and the water dried quickly, leaving a thin tacky surface. One could put it in a small spray bottle too. Very easy to clean with water. If you eventually get buildups after weeks of printing, a quick wash with soapy water cuts through instantly. Give it a try. I could never get PLA to stick to my glass bed. PETG worked sometimes, and other times it bonded too well and broke the glass when it was removed, or cooled to the point of removing. The sugar water worked there too in providing a sacrificial layer that protected the glass and made removal easier.
Hey man, your first layer isn’t getting enough squish by the looks of it. It likes a decent amount of push into the bed compared to some other materials. PETG doesn’t like as mush mash down as PLA. So if your printing PLA, try increasing your squish. You can do this via your z offset.
But do you really need your bed at 70? Mine runs and sticks just great at 60. 70 seems a bit warm for pla, as it keeps it just a bit too close to the glass transition temp for my liking. But if 70 has worked for you, then stay there.
But as another suggested, maybe raise your first layer temp by 5 or 10 and see if that helps. It might be that it needs a bit higher temp to flow better.
Increasing temp by 5, plus recleaning the bed, plus doing some cold pulls helped a bit. I’ve always had issues getting things to stick at 60 for some reason, at least ever since I went to borosilicate. I’ll try adding more squish, since I have to dehydrate my filament before I give the print another shot.
Increase the temp on your first couple layers by 5°. I’ve found that really helps with adhesion. If you’re still having difficulty with certain prints try using a brim.
Hair spray is the way
Yeah I was doing that for a bit but I hate cleaning it off the plate. I should have never switched to borosilicate 😂
buy a cheap spray / spritzer, fill it with IPA, saturate the hairspray before paper toweling it off. You may have to take two passes to get it right. You can get away with a pretty good layer of the the hairspray, so I usually just touch up the bed with a spray between builds and clean after maybe 10 or something…