Notifiche
Cancella tutti

PETG help!  

  RSS
david.l11
(@david-l11)
New Member
PETG help!

Hey folks,

I've whipped my stringing problem and now have these tiny holes in layers randomly.

Under extrusion?

Printing at 240 and bed at 90.

Extruder @ 1.05, retraction at 4.5 (only way to get stringing down)

All in slic3r

Thanks

Postato : 19/08/2017 1:47 am
Hackinistrator
(@hackinistrator)
Trusted Member
Re: PETG help!

your retraction is very high for direct extruder .
PETG is known for oozing , eliminating oozing completely is not always the best solution .

if you want to leave it as is , try to play with "Extra length on restart" setting , also mark "Only retract when crossing perimeters" under print tab .

also try to put highest retraction speed possible instead of using such high retraction length

Postato : 21/08/2017 2:31 pm
Wirlybird
(@wirlybird)
Reputable Member
Re: PETG help!

I use mainly the stock PET setup in Slicer PE with small changes. 240 temp and bed 90 and I print fairly slow which PETG likes.. I don't think I touched the retraction settings. PETG brand and color can have an effect.

Postato : 21/08/2017 5:57 pm
david.l11
(@david-l11)
New Member
Topic starter answered:
Re: PETG help!

@sergey - Great tips, I'll try that out, thought that was a little high.

@wirlybird - I'm printing pretty darn slow, 20 on all perimeters

I'll report back as im seeing under extrusion at the beginning of each layer, i imagine that retraction is killing it when it starts each new one.

Postato : 22/08/2017 12:57 am
Linux User Group Oberschwaben
(@linux-user-group-oberschwaben)
Estimable Member
Re: PETG help!

Did you calibrate your extruder, i had similar issues and extruder calibration did fix them quite nicely 🙂

Postato : 22/08/2017 1:01 pm
david.l11
(@david-l11)
New Member
Topic starter answered:
Re: PETG help!

@manuel - You know i dont believe I ever did!

The recommendations earlier licked the problem however. Very excited.

Final settings for anyone else below (Slic3r)

Temp 240
Board 90
Extrusion 1.15
Fan Always on, min 30% max 50% (I get thermal runaway if its more)
Retraction 2.5
Retraction speed 45
Extra length on restart .2
Minimum travel after retraction 1
Retract on layer change

I've managed to get rid of 90-95% of stringiness, and no more underextrusion at the beginning of new layers.

Postato : 22/08/2017 3:12 pm
Linux User Group Oberschwaben
(@linux-user-group-oberschwaben)
Estimable Member
Re: PETG help!

That sounds good. I have similar settings.

For my full settings see: http://shop.prusa3d.com/forum/viewtopic.php?f=12&t=5578&e=1&view=unread#unread

I would still recommend to calibrate your extruder its done in 5 minutes: https://mattshub.com/2017/04/19/extruder-calibration/

Can you post a result pic ?

thanks

Postato : 22/08/2017 3:39 pm
Condividi: