Thanks so much for posting this. I went through your checklist, and the heater block screws were loose. To anyone reading this thread: Check your heater block screws before you tear your extruder out. Remove your nozzle, and there is a screw dead center behind the nozzle and two screws above it to the left and right. I tightened all screws and the problem was fixed.
Wish i knew about that retightening after 200c. I had two of these hotends, both failed. The each unscrewed the nozzles during a print and the nozzle ended up encased in a solid blob of filament. So went back to fixed nozzle hotends.
sto avendo lo stesso problema ed ho fatto lo stesso percorso. mi manca solo di cambiare l’estrusore. l’estrusore ti è stato cambiato in garanzia?
I think I have same problem with my P1S. Bambu PLA matte problem with first layer, can't fix
I have had very similar problem after software up date. With a 0.2 nozzle the first three layer the nozzle is bumping over the plat and layer 2 and 3, with a very large elephant foot. After that all seems OK. With a 0.4 nozzle only the first layer is bumping over the plate with a small elephant foot.
P.S. I got so frustrated at trying to fix it and Trying get help, I have side lined the printer. I tried to get a ticket but failed to find a relevant way.
I am one of those who went through the trouble of finding the right offset and changed my printer profile. Then when I started printing PLA and not PETG, of course it varied and I needed to start over.
I ended up adjusting the first layer flow rate instead of the height. I read up and eventually figured out that this might impact accuracy of the dimensions, tolerances, etc. I went back and did this for PETG and did many before and after calibration cubes and THEY WERE THE SAME.
So, given that printer settings apply at the printer level and not filament level, it’s not ideal to have this ‘change’ sit in the printer config which will need changing when using different filament types. It also is a PITA to debug the z-hight to get it perfect (can’t do them on the same printing run unless you modify gcode by hand). The first layer flow rate is super easy to dial in thanks to this print.
I would love to be proven wrong because I honestly have no clue how the z-height corresponds to the first layer flow and why that doesn’t mess up the rest of the model, but I do think the first layer is more accurate now that I’m not adjusting the z-height. No elephant foot.
This was it for me. Now I have perfect 1st layers again
i have had this problem for a long time.
my machine has been idle for a long time but i can’t solve it. the extruder sometimes clicks a bit when printing and the first layer is really messy. i have done everything but nothing helps.
i am now arranging maintenance but i still want to ask here. a video or photo will follow later.
out of the box i have that problem
and no i have everything done form the quick guide.
I have also tightened the 4 screws behind the nozzle
I have the same issue. I partially solve this by rising the temperature from 240 to 290 degrees in the case of petg on the first layer.
I should open a ticket also.
I had the same problem.
What worked for me was loosening the three screws holding the heater, then tightening them again while gently pushing the whole assembly slightly upwards.
The printer works like new again.
mine is doing the same thing, I did a z-offset of 0.04 (not the -0.04 like the default), seems to make all my nozzles work better for the first layer.
I “fixed” mine by manually adjusting the z-offset to 0.04. Aside from that, nothing else I tried worked, I checked the three screws behind the hotend, they were loose, but tightening didn’t help. I trying re-leveling the bed using the gcode from BL, that didn’t work. Sidenote, I was having this issue before doing the heated bed replacement from the recall a while ago, I was hoping that was going to fix it, it didn’t. Seems no matter what nozzle I use, it always digs into the bed if I forget to use my z-offset profile. You can tell right away if a print is going to be an issue if you here that clicking when its printing a higher volume of material. The only thing that worked for me was the z-offset, though eventually I should submit a ticket to properly get it fixed. Occasionally for really tall prints, it can start scraping the part as it gets higher, hence needing to actually do a repair, but for now, anything that’s only a few inches tall along with the z-offset gets me functional.
Me too. I went back and forth with support for weeks and ultimately they ‘resolved’ the issue with this:
For now, the best solution would be to adjust the Z offset, since you have replaced most of the toolhead components. I believe the printer just requires a new Z offset
If you need any further assistance, please don’t hesitate to contact me
Thank you,
Bambu Lab Customer Support
I ordered the following, figuring I’ve replaced almost everything else in the toolhead.
PTFE Tubes × 1
4000mm*1 (AMS Hub/Custom cut for all series) / White (41100) $9.99
Hotend Heating Assembly - A1 Series × 1
A1 Series $19.99 ← Because I ordered a supposedly OEM one from amazon, but don’t know if it’s actually OEM (though the box looked legit)
Filament Sensor Base - A1 Series × 1
A1 Series $2.99 ← Because I didn’t realize this is part of the extruder assembly I’ve already replaced
Toolhead Block - A1 Series × 1
A1 Series $5.99
One thing I noticed on disassembly - the three nuts that attach the heating assembly to the toolhead are not flush with the surface of the toolhead block. They stick out a bit. On the new toolhead block they are flush. I don’t know if they pulled out a little or if it was just made differently. May be something to check if others find this.
Customer Support got me a replacement hotend assembly and after install my machine works flawlessly now! Don’t know why it took me so long to submit a ticket, but my entire issue was resolved in one reply with part replacement. They replied in less than a day, and the part shipping took about a week.
I had a filament implosion so I had to replace nozzle heating assembly and got a new hardened steel nozzle. Whenever I try print now the nozzle scrapes the filament as it’s printing. I can’t seem to find the option to change the z offset, neither on the a1 mini itself or Bambu handy on my pc. Please help me!!
This has happened to me, but eventually it just fixed itself!