Printing elastic filament
I just want to share what i tried so far and get your input on what worked for you and what not.
I think everyone who ever tried printing elastic material came to the point where you realize that the most important part is the guidance of the filament after the bolt. There are a couple of solutions for this and i tried a few of them.
At first i tried to modify a wade extruder, but the idler / bolt diameter mismatch made it difficult. Inserting a PTFE tube in the lower part of the wade made things better, but was still not really reliable enough for me.
From 10 points i would give it a 4
Then i tried my hand at creating a bowden extruder for elastic filament and to my surprise it worked rather well. The final design i ended up with was my Compacto extruder. The PTFE bowden tube went through the complete extruder and had a hole on each side for the bolt and the idler. http://www.thingiverse.com/thing:336444
The extruder worked totally reliable but was a PITA to load and unload. Also it was impossible to create a direct drive version of it.
For that it gets 8/10 from me.
Here are some earlier versions https://photos.google.com/u/0/album/AF1QipNpPW5hAfuolH3Dap90JXbOjROlIXghfuryOeeDhttps://photos.google.com/u/0/album/AF1QipNervU1i6jeW1WeQD79iMIRwIlEnQruMnQRNnKv
After that i came over a friends design, the TinyFlexhttp://www.thingiverse.com/thing:615465
While i liked it a lot and it simply works, i did not like the mounting though. So again 8/10.
Thomas and i created a NEMA 14 variationhttp://www.thingiverse.com/thing:643582
Of course it will only do 1.75mm filament, but it will easily cope with high print speeds (>100mm/s).
From that i derived the TinyFlex V, which offers a V Mount and can be mounted left or right sided (for dual or dual X carriage use).https://goo.gl/photos/5E4FYEyAWFj3ToLq8
That one is not fully finished yet so the design files are not online.
So far i give it 9/10
So what did you try? What did work, what did not? #extruder #elasticfilament