Is the PLA sticking to the nozzle because it’s not sticking to the bed on the first layer? That would would be an adhesion problem. Wash your bed with hot water and dish soap. Give it a real good scrub and be careful to not touch the print surface after that.
If PLA is sticking to the nozzle during the print I would look at drying your filament. Filament with moisture in it will often stick to the nozzle as the moisture turns to vapour in the nozzle and cause the plastic to spurt and string.
I’m having the exact same problem. I’ve tried cleaning the bed with both window cleaner and dish soap, factory reset and recalibrate, changing the printing porfile, speed and temperature, performing a calibration through the software and nothing works. Even the printing calibration to find the k value sticks to the nozzle instead of the bed. Does anyone have other ideas?
the filament is dry, I just opened it, it´s brand new. also, I’ve had the printer for 6 months now and never needed to use glue, it always printed fine, except now it does not, for some reason
How are you cleaning your plate? Parts coming unstuck mid print are normally because of a contaminated plate in conjunction with the part warping or too low of bed temperature.
I wash with dish soap then wipe down with 99% alcohol (the latter is out of habit from pre-PEI DIY days). Admittedly, I dont do this every single time before I start a print. But since the problem started, I have cleaned the plate and it still sometimes come off.
Also I just realized that it always seems to come off on the same side. I’ll have to keep note of that next time it happens. Maybe a problem with the bed heater? not uniform or something? then getting pushed around by the extruder. dunno, just speculating.
I’ve just hit this same problem. I’ve had my P1P for a month or so and it worked perfectly up until very recently. I had adhesion problems and clumping at the nozzle so I tried recalibrating and cleaned the plate with 99% alcohol. The next print worked perfectly. Thinking the calibration had cured it I tried printing the dessicant holders for my new AMS unit. A disaster. I started it before heading to work and in 30 minutes it basically ruined my nozzle. A huge mess of PLA on and inside the nozzle covering the heater inside the silicon sock. I will try to get the PLA off the nozzle and move everything over to the spare but I suspect I will need to buy a new one.
If you are using PLA I suggest buying the Bambu smooth PEI plate. My experience with textured PEI is that is just simply doesn’t stick, and you can’t spot the fingerprints and stuff that you have to clean. I had the same problem with my P1S and now I’m using smooth PEI that works like a charm.
I had the same experience the first time it happened. everything was stuck on the tip and inside the silicone sock. I manually heated up the extruder to 250*C then removed as much of the gunk as I could, and removed the sock and wiped off melted plastic around the nozzle with paper towels. I let the plastic inside the sock cool down then just peeled it out and put the sock back on the tip. Nothing was permanently damaged.
I replaced my 0.4 nozzle which needs extensive cleaning and may have damaged wiring. I put my 0.2 nozzle in, reset, calibrated and then tried to print a small model. The test line at the edge of the plate printed beautifully and then it tried to start printing the model. Nothing adhered to the plate and instead built up on the nozzle and I cancelled the print and quickly scraped it off. I then took the plate off and scrubbed it with detergent and hot water and tried again. This time I got some adhesion, but then the model started peeling up off the plate and I had to stop the print again after a couple of minutes. Not good. The first 3 weeks of using the printer it was flawless. This is getting annoying now. I store the filament in a sealed container with 2Kg of dessicant and the spools have been through a dryer at 55 for 6 hours.
Are you using paper towels to clean the bed or a cloth?
What kind of detergent? Most have additives that can cause issues.
55 for 6 isn’t very long, depending on how damp they were to begin with. Dessicant is great for storing, but kinda blows at drying. Well it doesn’t, just takes forever.
What kind of filament. You don’t mention so I’m not going to guess.
As for the first nozzle, just heat it up with hot air or whatever you’ve got. Probably did ruin the thermistor and heater wires, but those are cheap and easy to replace. If the nozzle isn’t bent don’t toss it.
Just imagining filament in a container with a whopping 2kg of dessiccant… You are keeping the dessiccant from being in direct contact with the filament, right?
2Kg of desiccant in a 45 litre SAMLA storage bin barely covers the bottom. I’m also going to move some of that into the storage containers I need to print for the AMS system. I have only managed to print one successfully so far due to the adhesion issue. The filament is standing up in it so not in direct contact. I’m planning on printing the holders designed for the 45 litre SAMLA anyway.
The dryer I got takes 2 spools at a time and recommended 4 hours at 50 for normal PLA. I gave it 6 at 55 to begin with then put it back into the storage bin full of desiccant. It’s no issue to up that to as much as 70 degrees for as many hours as required. Filament so far is all Bambu PLA Matte or Basic.
I’ve been using 99% alcohol spray and a wipe down with a microfibre cloth for most of the time. When I sussed that the plate seemed to be the problem it got transferred to the sink and scrubbed with a dish washing brush and Fairy liquid detergent and hot water for a few minutes. I dried it off with a towel then once dry it got a misting of the alcohol and wipe with the microfibre. The print stuck initially but the corner peeled up as the next few layers dried and it got cancelled.