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Issues with bed adhesion using PETG on A5S
Kenneth Lloyd Boller
Posts: 34Member
I have been trying to print with PETG on my new A5S for days now.
ive been googling about and trying every setting suggestion i can find but still cant get my first layer to stick to the bed, im using Cura as my slicer program (tried kissslicer, didnt like it) and the only time iv been able to get anything to print was using the default "Draft" setting for PETG right after leveling the bed again and again and again. i printed 2 puzzle pieces as a calibration to see if they would fit together, before i printed my real project...they didnt
so i changed the horizontal extension (and nothing else!) and now cant get anything to print at all cant get anything to stick to the bed, PETG sticks to literally everything BUT the print bed, ive cleaned the print bed with water and alcohol but have not tried using glue sticks or blue tape or hairspray yey, id honestly rather not unless its absolutely necessary.
i bought PETG cause from everything id heard it was like a better PLA and i had good luck and got alot of cool prints off with my PLA spool that came with the printer, this is my first printer im a huge noob at all this but I think im learning as i go slowly but surely but after a couple days of not getting anything to print and trying everything i can think of its getting very frusterating when all my nozzle wnats to do is spew strings that just dance around off the bed and im at my wits end with it so that brings me here to ask all of u nice people for even more suggestions.
heres some of the things iv found in my googling about that ive tried so far
https://jgaurorawiki.com/a5/bed-adhesion
https://jgmakerforum.com/discussion/296/petg-unable-to-print-a-perfect-object
https://jgmakerforum.com/discussion/616/petg-printing-a-lot-of-frustrations
i also thought maybe i wasnt getting the bed leveled good enough because everytime i level it i never know whats too tight and whats too loose with the sheet of paper, should it be a very slight friction or a proper scratch? iv leveled it more times then i can count both cold and hot both and finally resulted to trying this mesh bed leveling thing i keep hearing about
So i upgraded the firmware today and after i saw the display of this community firmware was no where near as pretty as the factory i wanted to put it back but cant figure out how but thats a separate issue entirely, I finally gave up on trying to revert the firmware back today and decided to just move forward with doing the mesh bed level thing and iv done it like 4 times now again cold and hot both and still nothing is sticking.
never buying another roll of PETG again...ill stick with PLA
...get it?
I really really just hope u guys can give me some new suggestions that i havnt alrdy tried or thought of yet, again im a huge noob at my whits end and i just want to print
[img]https://i.imgur.com/U1uCvXe.jpg[/img]
[img]https://i.imgur.com/44dSRdn.jpg[/img]
ive been googling about and trying every setting suggestion i can find but still cant get my first layer to stick to the bed, im using Cura as my slicer program (tried kissslicer, didnt like it) and the only time iv been able to get anything to print was using the default "Draft" setting for PETG right after leveling the bed again and again and again. i printed 2 puzzle pieces as a calibration to see if they would fit together, before i printed my real project...they didnt
so i changed the horizontal extension (and nothing else!) and now cant get anything to print at all cant get anything to stick to the bed, PETG sticks to literally everything BUT the print bed, ive cleaned the print bed with water and alcohol but have not tried using glue sticks or blue tape or hairspray yey, id honestly rather not unless its absolutely necessary.
i bought PETG cause from everything id heard it was like a better PLA and i had good luck and got alot of cool prints off with my PLA spool that came with the printer, this is my first printer im a huge noob at all this but I think im learning as i go slowly but surely but after a couple days of not getting anything to print and trying everything i can think of its getting very frusterating when all my nozzle wnats to do is spew strings that just dance around off the bed and im at my wits end with it so that brings me here to ask all of u nice people for even more suggestions.
heres some of the things iv found in my googling about that ive tried so far
https://jgaurorawiki.com/a5/bed-adhesion
https://jgmakerforum.com/discussion/296/petg-unable-to-print-a-perfect-object
https://jgmakerforum.com/discussion/616/petg-printing-a-lot-of-frustrations
i also thought maybe i wasnt getting the bed leveled good enough because everytime i level it i never know whats too tight and whats too loose with the sheet of paper, should it be a very slight friction or a proper scratch? iv leveled it more times then i can count both cold and hot both and finally resulted to trying this mesh bed leveling thing i keep hearing about
So i upgraded the firmware today and after i saw the display of this community firmware was no where near as pretty as the factory i wanted to put it back but cant figure out how but thats a separate issue entirely, I finally gave up on trying to revert the firmware back today and decided to just move forward with doing the mesh bed level thing and iv done it like 4 times now again cold and hot both and still nothing is sticking.
never buying another roll of PETG again...ill stick with PLA
...get it?
I really really just hope u guys can give me some new suggestions that i havnt alrdy tried or thought of yet, again im a huge noob at my whits end and i just want to print
[img]https://i.imgur.com/U1uCvXe.jpg[/img]
[img]https://i.imgur.com/44dSRdn.jpg[/img]
Post edited by Kenneth Lloyd Boller on
Comments
found this, gonna try it without the glue first just flipping the bed and taping it and if i still dont get a stick ill glue it.
would still much appreciate any additional ideas settings or suggestions tho please.
thanks in advance guys.
re-mesh leveled the bed with nozzle at 240 and bed at 100 still no stick
tried again with a Z offset of -.2 still no stick
tried again with a Z offset of positive .2 still no stick
re-leveled the bed again without being heated up tried all of the above again,
still... no... stick...UGH!
really beginning to hate PETG but i have 2 giant rolls of it that i need to use up now or else ive just wasted my money on them if i cant use em
someone...anyone...please help me
im a noob in desperate need of a guru.
think i might finally be getting somewhere...i put the blue tape back on but apparently bed temp was too hot? i used the preset "Draft" setting in cura and only changed bed temp to 65 and nozzle to 250 and we finally have adhesion.
cant believe over 50 people have viewed this in the last 24 hours and yet im here talking to myself with absolutely 0 help or response...
Happy to see you found a kind of solution to your problem, I'm not an specialist on PETG and what I heard a lot of people is having this issue with the bed adhesion and most of them they use a spray/glue for PETG to keep the object on the bed.
Sorry if 50 people viewed your post without leaving you a comment but some people are not using PETG or they have the same issues as you and they enter just to see if you can help them, and also possible those people are beginners and they can't help you. Hopefully others will post a comment with their experience with PETG
The good thing is you made all this steps and your experience may help others. So please let us know more about your PETG problems, many thanks to share your problems with us
Use good PLA setting and make these changes.
A: Level the bed good with a sheet of paper with the nozzle at 245 and the bed at 70.
B: Print temps 245/70
C: Spray the bed with Aqua Net hair spray. (I use hairspray for ALL filaments)
D. First layer print speed = 15mm/sec
Hope this helps
PETG is not a perfect material. 100 on the bed is definitely far too hot. What are your current settings for nozzle and print temps? Whats your first layer print speed and first layer fan speed?
When you change printing materials you need to clean the bed thoroughly as the residue can make it hard for a different material to stick..
tried changing nozzle temp to 250
bed temp to 100
fan speed to 80%
brim of 20
initial layer height of .3mm
flow of 96
initial flow of 94
retraction distance of 4
tried enabling z hop of 1mm
tried putting in all sorts of z offsets from -.2 to +.2
and still no adhesion
probably leveled the bed like 20 times hot and cold and somehow, someway finally got my finger pieces to print and i honestly changed the setting so many damn times i couldnt even tell you what settings i used to finally get it.
yesterday my Black PLA came in the mail so i unload this White PETG and tossed it to the side, ill want to use it up eventually but right now im done screwing with it.
below are the "Draft" default settings for generic PETG and the only change i made to these settings was knocking down the bed temp to 65 and that seemed to work best for the most part.
[img]https://i.imgur.com/RwVPmmr.png[/img]
[img]https://i.imgur.com/9mCcZs2.png[/img]
[img]https://i.imgur.com/Crib6iJ.png[/img]
[img]https://i.imgur.com/tiBZtK4.png[/img]
still need some help and have some questions about the firmware but i may make another post for that later on, i rly dont like the looks of ther Merlin community firmware but the bed mesh leveling is a rly cool feature of it so im undecided.
thanks for the responses guys sorry for seeming a little snappy and salty on my last post PETG was just getting on my last nerve and was becoming very frustrated with it.
I understand the frustrations. Sometimes good to take a break from 3D printing when things get frustrating. Often there's more than one problem that needs to be solved.
Bed adhesion:
HAIR SPRAY on the black diamond coating is best.
Keep your first layer between 15-20mm/s and always around 0.25 to 0.3mm
bed temp between 75-85ºC
Extrusion issues:
Make sure your heat break is properly connected to the heatsink and the heatsink has proper airflow. Use a bit of anti-seize or thermal paste when you insert the heat break into the heatsink. Make sure your nozzle is properly tightened.
Cooling fan:
Not more than 50% fan required for PETG. It doesn't like to be cooled too much unlike PLA. (Crank your cooling to 100% for everything above the first layer for PLA)
Make sure your fan is at 0% for the first layer.
Extrusion multiplier/flow rate:
Set this to 105-110%. PETG is a softer material than PLA. Your extruder was calibrated for PLA. PETG will "squish" when passed through the extruder so you need more flow in order to get your extrusion right. (Or calibrate your e-steps for PETG)
If you have a way to dry your filament, do it. PETG absorbs water from the air. I bought a food dehydrator and put my PETG in it for ~2-5hrs before printing. I also store all my PETG in a air-tight container with the desiccant packs.
PS
when I went to the BMG extruder my extrusion issues went away. I highly recommend a geared extruder over the stock one.
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