Ninjaflex Tips ?

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cyberplourin
Posts: 2
Joined: Sat Apr 08, 2017 9:09 am

Ninjaflex Tips ?

Postby cyberplourin » Wed Jun 21, 2017 11:12 am

Hi,
i'm going to try my first ninjaflex printing. Is it possible with the original V2 hot end ?

Jetguy
Posts: 2700
Joined: Tue Mar 22, 2016 1:40 am
Location: In a van, down by the river

Re: Ninjaflex Tips ?

Postby Jetguy » Wed Jun 21, 2017 2:11 pm

Yes, the V2 hotend is fine for this, most of the issue is between the spool and the stock feeder mechanism, which you should adjust to best grip the filament. In addition, because flexible filament and especially soft rubbery Ninjaflex is so flexible, remember the gear gripping feeder is pushing the filament. Since it's not a hard rigid "wire" it will try to find anywhere it can squeeze out AKA buckle between the gear exit and the hotend. It also has friction against all that guide path which is taking away from any force pushing it into the hot nozzle. This means you MUST print much slower, ideally between 20-30mm/s for all parts of the print (shells, infill, roofs and floors), and things like first layer, go even slower.

While you can print with Ninjaflex using an all stock system, again, you will have to go slower, you may have to adjust the motor and gear to V groove bearing pinch distance to grip the filament, you may have failures and jams in the guide path and even slip and under extrude because the drive gear cannot force the filament.

Another reason to upgrade to a Bondtech feeder basically.

Jetguy
Posts: 2700
Joined: Tue Mar 22, 2016 1:40 am
Location: In a van, down by the river

Re: Ninjaflex Tips ?

Postby Jetguy » Wed Jun 21, 2017 2:15 pm

viewtopic.php?f=4&t=899
viewtopic.php?f=2&t=493
viewtopic.php?f=2&t=879

Also, since TPU is what Ninjaflex is, this recent thread is related viewtopic.php?f=8&t=1876

User avatar
walshlg
Posts: 1349
Joined: Wed Mar 23, 2016 12:01 pm

Re: Ninjaflex Tips ?

Postby walshlg » Wed Jun 21, 2017 4:27 pm

the biggest additional help is
1) place filament on a holder above the printer and try not to use ANY guide tubes except a short length at the top of the cold end
2) unload, trim the kink and reload IMMEDIATELY before printing, letting it sit for even 5 minutes after loading will result in a kink in the filament and a cold end jam


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