Print flex filaments with 3Drag/K8200

by BorisLandoni, published

Print flex filaments with 3Drag/K8200 by BorisLandoni Jul 11, 2014
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Extruder base and guide filament for 3Drag printer, modified to accept flexible filaments (Ninjaflex, TPU ...)

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Print the two parts and replace existing ones

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Nov 16, 2014 - Modified Nov 16, 2014

Dumb question, does this work with regular filament as well, or would you have to put the old piece back in?

I'm curious what the mechanical idea is behind this, but can't quite tell from looking at it. I take it there were issues with a stetchy, flexible filament jamming, or slipping in the stock extruder? I see the arc'ed cutout in the tube the filament travels down. With the stock extruder plastic piece, would the flexible filament get squirrelly and try to slip off the side of the bearing, rather than getting shoved down the tube?

I just printed an iphonecase with this mod on my k8200 using Ninjaflex with great success.
I kept all speeds low!
15m/s for all movements and No retraction. (only minor, yes minor, cleanup needed for the power and speaker hole)

i tried a simmilar mod for my k8200...
but i cant print with TPE. the extruder gear turns around but the filament doesn come out of the noozle.
i want to print with flexible filaments... is flexpla/ninjaflex/filaflex better to print than TPE?
i dont want to waste money...

I would suggest upgrading to a hobbed bolt like this one http://www.ebay.com/itm/RepRap-Hobbed-bolt-Wade-Mendel-Huxlel-3D-Printer-Extruder-/311132167625?pt=LH_DefaultDomain_3&var=&hash=item4870ec1dc9

It guides the filament much more accurate and it doesn't get stuck on it's way down the feeding tube.
The key element though is to print at a very low speed.

I suggest slicing the extruder base with support enabled and a couple of mm of brim: this avoids potential detach of the externals fins while printing at fast speeds and a clean surface for the bearing housing

Perfect timing!
I got my first spool of ninjaflex today =)