ninja flex printing issues

[Andy_Sendra]

every time I try to print with ninja flex on my prusa remake printer the filament slowly bends in the extruder and goes under the extruder gear and stops printing

I am not sure how to fix this

[Hackentosher]

What speed and temperature are you printing at? Also is your machine a 1.75 or 3mm machine? Bowden or direct drive?

[bob345]

if its an original prusa and has the standard hotend, ninja flex will be next to impossible to print. I woudl recommend upgrading to a all metal hot end like the e3d v6 or the Prometheus v2 hotend. The extruder itself may need an upgrade too if there is too large a gap for the filament to travel after the gear.

[Hackentosher]

1 minute ago, bob345 said:

if its an original prusa and has the standard hotend, ninja flex will be next to impossible to print. I woudl recommend upgrading to a all metal hot end like the e3d v6 or the Prometheus v2 hotend. The extruder itself may need an upgrade too if there is too large a gap for the filament to travel after the gear.

Uh what? Prusas are a design, not a specific printer, and the i3 mk2 from Joseph Prusa comes with an e3d. Besides, I'm sure if you go slow enough you could do it. I can do 90A TPU on a bowden machine that needs a clamp on the idler to grip properly. 

[bob345]

Just now, Hackentosher said:

Uh what? Prusas are a design, not a specific printer, and the i3 mk2 from Joseph Prusa comes with an e3d. Besides, I'm sure if you go slow enough you could do it. I can do 90A TPU on a bowden machine that needs a clamp on the idler to grip properly. 

your right, my mind just always jumps to the branded i3 whenever i see prusa. That said, i have seen plenty older designs that have peek hot ends which can jam extremely easy.

[werto165]

print a filament guide for your printer there might be one on thingiverse or try to install a PTFE tube such to guide it into the hotend. I seem to get away with TPU with a direct drive extruder without one but obviously YMMV. I print with speeds of 30mm/s,10mm/s for first layer and a bed temp of 40oC with a greater overlap with perimeters about 25% (again YMMV) and increase my flow rate ever so slightly by 1-10%. 

[Andy_Sendra]

11 hours ago, werto165 said:

print a filament guide for your printer there might be one on thingiverse or try to install a PTFE tube such to guide it into the hotend. I seem to get away with TPU with a direct drive extruder without one but obviously YMMV. I print with speeds of 30mm/s,10mm/s for first layer and a bed temp of 40oC with a greater overlap with perimeters about 25% (again YMMV) and increase my flow rate ever so slightly by 1-10%. 

i figured it out yesterday guys it was a simple fix I just disabled retraction and it worked find