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Trouble printing the extruder body right  

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Halle.s
(@halle-s)
Trusted Member
Trouble printing the extruder body right

https://github.com/prusa3d/Original-Prusa-i3/blob/MK3/Printed-Parts/stl/extruder-body.stl

Sli3r :

S3D :

This is the part where the first PTFE tube goes in. I've printed this 3 times now, once in Slic3r and twice in S3D. It comes out all crummy and the PTFE tube does not fit in the hole. I print the external perimeters very slowly with a 0.2 layer height. Bridge cooling is set to 100%. Seeing how this part slices, I'm not sure how it's supposed to be printable in PETG since it requires the extruder to do sharp turns in mid air.

Posted : 16/05/2018 7:39 pm
StefsEngineering
(@stefsengineering)
Eminent Member
Re: Trouble printing the extruder body right

Did you try to change the extrusion width? If I remember correctly S3D has a default width of 0.48mm (assuming a 0.4mm nozzle). Try setting it to 0.45 for example.

Posted : 16/05/2018 7:51 pm
Halle.s
(@halle-s)
Trusted Member
Topic starter answered:
Re: Trouble printing the extruder body right

It was set to 0.45.

Posted : 16/05/2018 7:58 pm
StefsEngineering
(@stefsengineering)
Eminent Member
Re: Trouble printing the extruder body right

You could set it to an hypothetical 0.40 and let S3D make the gcode and check if anything has changed in the preview. But perhapse better, did you check if Prusa has recommended settings for these parts? It may work better with an increased layer height.

Posted : 17/05/2018 1:08 am
reid.b
(@reid-b)
Reputable Member
Re: Trouble printing the extruder body right

Not sure what is going on with your slicer. I just printed this very part last night. Sliced with Simplify 3D, .2 layer height, reasonably fast print speed, Filamentum CPE HG 100:

Posted : 17/05/2018 2:01 am
Halle.s
(@halle-s)
Trusted Member
Topic starter answered:
Re: Trouble printing the extruder body right


Not sure what is going on with your slicer. I just printed this very part last night. Sliced with Simplify 3D, .2 layer height, reasonably fast print speed, Filamentum CPE HG 100:

You're not looking at the right thing.

Posted : 17/05/2018 2:11 am
reid.b
(@reid-b)
Reputable Member
Re: Trouble printing the extruder body right

Ah, you are correct. Okay, take 2:

Posted : 17/05/2018 2:29 am
Halle.s
(@halle-s)
Trusted Member
Topic starter answered:
Re: Trouble printing the extruder body right

And S3D is just happy to punch a hole in the lip.

Posted : 17/05/2018 2:39 am
Halle.s
(@halle-s)
Trusted Member
Topic starter answered:
Re: Trouble printing the extruder body right


Ah, you are correct. Okay, take 2:

That's not the right thing either haha. Either way... you showing me your prints isn't really helpful in getting mine right.

Posted : 17/05/2018 2:42 am
reid.b
(@reid-b)
Reputable Member
Re: Trouble printing the extruder body right

No clue what you are shooting for, you said where the PTFE tube goes. Fine, I'm done here with helping (sheesh). Good luck.

Posted : 17/05/2018 3:00 am
Halle.s
(@halle-s)
Trusted Member
Topic starter answered:
Re: Trouble printing the extruder body right


No clue what you are shooting for, you said where the PTFE tube goes. Fine, I'm done here with helping (sheesh). Good luck.

There are 2 PTFE tubes that go in this part. One is before the gears, where the filament goes in. The other one is after the gears and goes into the heatsink. The part that is troublesome is with the hole where the first PTFE tube that the filament encounters sits, before the gears. I posted a screenshot of the specific area of the part. I don't know how I can be clearer than that short of a screen recording or a video. Thanks for trying to help anyway.

Posted : 17/05/2018 3:04 am
Halle.s
(@halle-s)
Trusted Member
Topic starter answered:
Re: Trouble printing the extruder body right

I fixed my issue by reducing the extrusion multiplier to 0.98! The hole was too tight because of overextrusion.

Posted : 17/05/2018 5:40 am
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