bambu labs A1 with AMS lite side positioned beside, A1, and top top mounted, both prints used either elegoo/3dhojor matte filament, stock printer settings, ABDELat ultimate gridfinity boxes printed. 4 prints with 1 successful, the other 3 came undone once the walls of the container started to print then spaghetti party. any ideas? this is the end result of what my issue is. bed adhesion is great, some very small extrusion variances on layer one and sometime 2 but no real issue . infill is perfect but when the top of the grid box [where the âwall layersâ would begin to start [not sure what layer in gcode] things seem to go sideways. the filament begins to not adhere and the stringing begins. i printed 4 different version of ABDELat ultimateâs boxes and 3 prints errored at approximately the same point [picture above].
i switched to single spool top mount and changed filament as well as print [layercakeâs parametric container done in Fusion 360] which turned out much beefier than the previous prints and with the same settings as above prints [0.4 mm nozzle size and a layer height of 0.2 mm] which is recommended by both creators. first print was perfect. a bit tighter on the grid due to specs but what i wanted. reprinted the exact same box and at a higher layer the same thing happened again. not sure what is going on here.
sorry for the huge post but wanted to give as much info as possible and avoid the vague question with no references.
thanks in advance for any help and wisdom.
darrel
print settings:
220c filament
65c bed
Bambu Lab .04 nozzle
textured pei plate
0.20mm standard @BBL A1
layer height 0.2mm
first layer height 0.2mm
full calibration test run, filament loaded and unloaded properly.
i live in florida with high humidity but all filament came straight out of the cryovac package and onto the spool.
Good info Firstly, but probably not related, filament out of the manufacturer wonât always be good and you will need to find a way to dry your filament eventually (before use is always the best).
I dabbled in gridfinity a little and always had lifting problems once it got to your size dimensions so youâre not alone. Adhesion is your main enemy in my experience, youâre going to make sure your plate is totally clean (bath in hot dawn dish detergent and rinse clean). Then possibly raise the bed temp by 5deg assuming your room is cold where you are. From there, Iâd be looking at either hairspray or liquid glue (brims are terrible but sometimes work too).
thank you for the reply. bed adhesion is excellent. it is mid print that the filament starts to not adhere [ie: the spaghetti]. as the print builds [say layer 50] it starts to not stick to the print. there is infill that is fine, it seems to stop âadheringâ on the wall loop.
as can be seen in the second to last and last pic, the extruder is working but the the filament starts to not stick to the print.
there are no fans in the room, room temp is approx. 69-70 with no ac on [i am in florida]. filament shows no obvious issue with being wet even though my humidity is high. but, this is all i can really guess it could be?
Yeah youâve covered most reasonable steps. My next step would be dry and recalibrate the filament.
I canât see the bottom of your print but is there any warped edges like its lifting? That was my initial issue with the infinity blocks (hence adhesion questions). Mine were ever so slightly lifted but not to the point of coming loose but it was enough to throw things out. If its all square down there, Iâm outta knowledge and pass it onto the next wise one
Are all feet of your printer chassis solidly on the table or desk? It looks like In one of your first photos that the A1 maybe is overhanging your desk, not stable, and the higher layers canât handle that?
the thing is is that it is sporadic. i have just printed 4 grids and 2 bins with absolutely no issues and no troubleshooting yet. trying to make sense of that right now.
i have an ender 3 background so i am well versed at troubleshooting unfortunately. the A1 is a different beast. i have used all of the slicers out there but the bambu is different. maybe not completely deved yet?
still and always learning. i appreciate your input!
heat bed cable does not touch the wall even with the bed all the way back. this on an ikea table that is metal mesh all the way around the base. i added angle iron cross bracing at the back to absorb the shaking.
Firstly, but probably not related, filament out of the manufacturer wonât always be good and you will need to find a way to dry your filament eventually (before use is always the best).
