RE: NinjaTek Chinchilla TPE (75A)
When printing with Ninja Tek Cheetah, I find that I can avoid extruder jams if I aim a pedestal fan at the extruder for the entire print. I think this prevents the extruder body from getting warm enough to soften the filament while it is being pushed into the hot end by the drive gear.
RE: NinjaTek Chinchilla TPE (75A)
I'm just getting back into doing this stuff, but I have since found that this upgrade, is the way to go. Been trying to resurrect my chinchilla and ninjaflex profiles and this at least prevents the filament from wrapping around your extruder gear.
XL Version
https://www.printables.com/model/1357415-xl-nextruder-main-plate-for-bogie-idler
MK4S/Coreone version
https://www.printables.com/model/1072020-mk4s-bogie-idler-main-plate
I'm still dialing in since I hadn't printed ninjaflex or chinchilla in some time. But main think is SLOW, like 1.08 MVS and something like 236C temp. Currenting testing a benchy print again. This is on the MK4S, since my XL is currently busy. I'm inclined to use up this 500g spool not get any more since the color choices are limited for this stuff. Ninjaflex or even something like sainsmart(92 or 95a) work for most tpu things I'd print and have far more color choices and are a bit easier to print reliably.
RE: NinjaTek Chinchilla TPE (75A)
This benchy ended up turning out about as ok as I'd expect with the bow having as much bridging as it does.
I've attached my settings. Should be similar for the XL. I have found also that heat creep is a thing for this and ninjaflex. If you have your printer in an enclosure, open the door while you're printing.
RE: NinjaTek Chinchilla TPE (75A)
So I was interested in getting my XL printing ninjaflex and chinchilla again after reading this thread. I hadn't really tried ina about 2 years and I've changed nozzles(from brass non-HF to obxidian HF). I also added the bogi mod to my extruder so that tpu couldn't tangle up in the extruder. I had done this in my core one(upgraded from MK4s) and my MK4s.
I've found the profile appears wildfly different from the MK4S. I have a working MK4S profile. Heres pictures of a bench I printed in ninjaflex this weekend on the MK4s. it's not perfect, but it's not bad either. I can't seem to get anywhere close to it on the XL. The big diff right off is that I have to up the temp to 250(from 238 on the mk4s). I don't know if that has to do with the HF nozzle. The MK4 has a non-HF obxidian so I would have expected the temps to be comparable. If I don't raise the temp to 250 on the XL it unextrudes from the very first layer. the best I've gotten so far is a pretty good bow but it starts to under extrude at the bottom of the cabin. I'm pretty sure this has to do with retraction. I also have working chinchilla profile on the MK4S that I'll try to get working again once I get this one going again.
RE: NinjaTek Chinchilla TPE (75A)
I can't seem to attach any screenshots.
RE: NinjaTek Chinchilla TPE (75A)
Ok here are the pics I was trying to attach. these are from MK4S. I can't get my XL to do comparable.
RE: NinjaTek Chinchilla TPE (75A)
Ok I finally got something that worked for ninjaflex and gave me comparable, maybe even better result than the MK4S.
I'll use it as a basis to try the chinchilla again.
RE: NinjaTek Chinchilla TPE (75A)
add media is not working currently, but here's a pic of the MK4S(left) and XL(right) benchy output.
RE: NinjaTek Chinchilla TPE (75A)
Add media is working again. left MK4S, right xl. I plan to try chinchilla again in the next day or two. Since my wife insists on having me print stuff in tpu, I have a vested interest in having solid profiles for the stuff I print with.
RE: NinjaTek Chinchilla TPE (75A)
Not having a ton of initial success with the chinchilla. I plan to try a few more times this weekend I suspect I'll end up burning through my half kg spool just trying to print samples.
RE: NinjaTek Chinchilla TPE (75A)
So I finally got a working chinchilla profile going for the XL.
I had to go much higher in temp than I expected which I'm wondering is because of the obxidian high-flow nozzles I have on the xl extruders. Anything lower had underextrusion and layers not adhering to eachother.
Hopefully this helps others. If you're using brass nozzles I suspect you'll have to lower the temps.
RE: NinjaTek Chinchilla TPE (75A)
Thanks for the ZIP file for the XL. Perhaps as good a print as one can expect from Chinchilla, but certainly not a very good print. I have made higher quality prints on the XL using NinjaTek's Cheetah, but that is entirely different.
RE: NinjaTek Chinchilla TPE (75A)
I agree, but if were to ever do anything functional with this or ninjaflex in general I wouldn't do something with all those bridges etc. I just want to be able to use up this spool at some point. I did make some bolt caps for the XL enclosure I have(3dupfitters) and for some shelves I built. I've not really had a reason to try cheetah just yet. I tend to default to sainsmart for my tpu which is 92-95A(depending on which specific color etc). That actually prints ok on all three printers(XL, MK4S, and newly upgraded core one). On the xl if I had any serious bridging I wanted to do I'd probably throw some bvoh soluble support filament in there. which reminds me I probably need to redo that profile too with the obxidian HF nozzles. Given the limited colors of chinchilla, the juice doesn't seem worth the squeeze to spend more time fine tuning.
RE: NinjaTek Chinchilla TPE (75A)
I purchased some Siraya Tech Tenacious Lava which claims to print in varying hardness depending on the print temperature. This might be another path to a softer print.
RE: NinjaTek Chinchilla TPE (75A)
You'll have to let us know how it goes. In the mean time I'll look that up. thanks.
I purchased some Siraya Tech Tenacious Lava which claims to print in varying hardness depending on the print temperature. This might be another path to a softer print.
RE: NinjaTek Chinchilla TPE (75A)
It looks like the lava product is resin. The thing I think you're referring to is the tpu air.
https://siraya.tech/products/flex-tpu-air-65a-82a-foaming-flexible-filament
Definitely interesting.
RE: NinjaTek Chinchilla TPE (75A)
Thanks for the correction. I ordered both from Siraya Tech. You are right: it is the flex TPU Air
RE: NinjaTek Chinchilla TPE (75A)
I've not dipped my toe in the resin printing pool yet.