Printing Flex Filament with the Flashforge

[LASERMAN]

My flexible (premium sebs filament from ebay.com.au) arrived today and no luck printing it on my falshforge dual. however after many googling if came to this post and found out the spring load feeder is the problem. i tried to hold down the spring tab with my hand when feeding it fed nicely! i end up putting a piece of plastic into the gap above the spring tab then all problem solved! thank heaps Geoff!

What size was this piece of plastic?

[curious aardvark]

Hmm, wonder of that'd work for ninjaflex. I feel an experiment coming on :-)

[curious aardvark]

as I've now got three different types (might be 4 with the ninjaflex) of flexible filament, I will get this issue sorted :-)
Thinking maybe changing the spring in the tensioner might work, But initially I'll try wedging it open.

[jfkansas]

I have a prototype feeding mechanism if you want to print and try it out.

[curious aardvark]

I'll give it a go :-)

[jfkansas]

I'll give it a go :-)

Base.jpgLever.jpg

Finally had a chance to test these with flex filament this weekend. All went well. Should me your email and I will send the STL files.

[curious aardvark]

100% hassle free printing flexible filament on ff.

Just wedge the tension lever open and it all works perfectly. Wedge I used is metal about 1mm thick and cut to the width of the lever.
That's it - job done :-)
In fact I've just left the wedge in for everything else as well.

Wondering why the head was tensioned so much in the first place as it's obviously not necessary.

[Stigern]

I had some issues where the extruder-feeding start making knocking noises, and filament won't go in or out. So I do a unload and load procedure when it happens. Could it be too much tension on that spring?

[curious aardvark]

yep - flexible filament won't work unless you've wedged the tension lever open - or rebuilt the extruder, guess which one is easiest :-)

Basically the extruder exerts way too much pressure on the filament. Flexible filament deforms and feeds sideways into the extruder itself rather than down the little hole.
But reduce that tension and it works without any problems at all.

[Lab C]

Many thanks for sharing this info. I'll inroduce your article to my Korean friends ! ^^;