ABS sticking to extruder Hi, I have a prusa I3B printer and when I print the abs plastic curls up and sticks to the nozzle. What should I do? I have tried changing the nozzle temp from one extreme to another but it doesn't seem to help. https://reprap.org/forum/read.php?1,555883,555883#msg-555883 Fri, 13 Mar 2026 19:48:21 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,555883,557374#msg-557374 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,557374#msg-557374
A month is a too short period of time to make any universal rule. ;)

To set your bed ways under the glass transition temperature
only means the early layers are not stretchable any more.
We use heating bed because we want the first layers to stay flexible.
Through, maybe 85°C allows a good bound on your print surface.
But these are two different things.

Like you, I don't use cooling fans with ABS.
But bridges and overhangs can't be very clean.
Each material have its own properties.

++JM]]> J-Max General Sat, 12 Sep 2015 11:53:26 -0400 https://reprap.org/forum/read.php?1,555883,557322#msg-557322 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,557322#msg-557322
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J-Max
So 110°C is a bit high, but 85°C is realy too low.
With a bed at glass transition temperature, don't cool the part too much with ABS,
or you'll experience wraping even with a proper bed temperature.
I would say cooling fans to 30-50% maximum.
So minimize bridges on your parts.
++JM

OK. I suppose different things work for different people.

I have been running 85C bed for ABS for over a month and never had a print lift or warp.

Also the reading I have done says you should not be using a print cooling fan for ABS. Maybe that's why you're having to go up to 105 to counter the cooling you shouldn't be doing ?

Also I use an aluminium bed, but with the plastic cover, it shouldn't make any difference if it is glass or aluminium.]]> DaveOB General Sat, 12 Sep 2015 08:40:03 -0400 https://reprap.org/forum/read.php?1,555883,557318#msg-557318 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,557318#msg-557318
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DaveOB
110 seems a bit high. I print abs without problems at 85C bed.
The bed must be set close to the glass transition temperature of the material.
At glass transition temperature, the material is flexible but keeps its shape.

Glass temperature :
ABS +-105°C
PLA +-63°C

So 110°C is a bit high, but 85°C is realy too low.
With a bed at glass transition temperature, don't cool the part too much with ABS,
or you'll experience wraping even with a proper bed temperature.
I would say cooling fans to 30-50% maximum.
So minimize bridges on your parts.

++JM]]> J-Max General Sat, 12 Sep 2015 08:16:32 -0400 https://reprap.org/forum/read.php?1,555883,557208#msg-557208 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,557208#msg-557208
first I calibrated my extruder with help from this video

[www.youtube.com]


then i figured out my optimal adhesive combination

bed heat from 85-100 anywhere in that range works for me

and a glue stick from the dollar store, I just clean off my bed with a razor blade every 2nd or 3rd print


Hope this helps =]]]> straton jd General Sat, 12 Sep 2015 00:30:54 -0400 https://reprap.org/forum/read.php?1,555883,557153#msg-557153 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,557153#msg-557153
But if your nozzle is hot enough to melt and extrude the abs, and you have curling up and clumping on to the nozzle, I would think that either your nozzle is too close to the bed and the abs can't get out the nozzle easily, or it is correct and the abs is not sticking to the bed.

Try dropping the temp to 85C bed and try this alternative method - no spray / slurry / glue, etc https://www.3dhubs.com/talk/thread/alternate-print-surface-abs-no-slurry

Due to the nature of PVC, ensure you have good ventilation.]]> DaveOB General Fri, 11 Sep 2015 18:01:10 -0400 https://reprap.org/forum/read.php?1,555883,556380#msg-556380 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,556380#msg-556380
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AlexY
What temperature is the bed heated to? For ABS I think it should be around 110ºC.

Yep, 110 celsius.]]> SkeptikRC General Thu, 10 Sep 2015 02:57:15 -0400 https://reprap.org/forum/read.php?1,555883,556258#msg-556258 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,556258#msg-556258
If you have some blobs, it's maybe over extrusion.
Did you set-up your extruder's preferences properly ?

++JM]]> J-Max General Wed, 09 Sep 2015 16:50:02 -0400 https://reprap.org/forum/read.php?1,555883,556246#msg-556246 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,556246#msg-556246 AlexY General Wed, 09 Sep 2015 16:24:57 -0400 https://reprap.org/forum/read.php?1,555883,556245#msg-556245 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,556245#msg-556245
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J-Max
Hi,

Don't try to jump as fast as that from extreme values.
If you want to calibrate temperature to match your filament need, print a calibration tower.

BUT I believe your problem is not due to extrusion temperature.
Check first the bed adhesion and then do a proper extruder calibration.

++JM

When it prints close to the bed the plastic comes out in small blobs so I don't think I can print. The higher the z axis gets the smoother it runs.]]> SkeptikRC General Wed, 09 Sep 2015 16:21:39 -0400 https://reprap.org/forum/read.php?1,555883,556241#msg-556241 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,556241#msg-556241
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AlexY
What surface are you printing on?

Borosilicate glass with hairspray on it.]]> SkeptikRC General Wed, 09 Sep 2015 16:14:54 -0400 https://reprap.org/forum/read.php?1,555883,556175#msg-556175 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,556175#msg-556175
Don't try to jump as fast as that from extreme values.
If you want to calibrate temperature to match your filament need, print a calibration tower.

BUT I believe your problem is not due to extrusion temperature.
Check first the bed adhesion and then do a proper extruder calibration.

++JM]]> J-Max General Wed, 09 Sep 2015 13:43:54 -0400 https://reprap.org/forum/read.php?1,555883,555937#msg-555937 Re: ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,555937#msg-555937 AlexY General Wed, 09 Sep 2015 06:46:38 -0400 https://reprap.org/forum/read.php?1,555883,555883#msg-555883 ABS sticking to extruder https://reprap.org/forum/read.php?1,555883,555883#msg-555883 SkeptikRC General Wed, 09 Sep 2015 04:00:58 -0400