SEND HELP!! TPU printing!!

Skip to first unread message

Genevieve Zeiler

Jun 15, 2021, 9:51:55 PM6/15/21
to Soft Robotics Toolkit Forum
I am replicating a soft actuator (see pictures below) for my final year engineering project. I am having a lot of problems with stringing. I've tried numerous different specs in simplify3D with no luck. I am using a fresh batch of NinjaFlex and have followed the suggested parameters from the original creator that are,

Flashforge Creator Pro Dual Head 
Layer height: 0.1mm
Nozzle: 0.4mm
Extrusion temp: 220C
Bed temp: 80C
Print Speed: 20mm/s
Infill: 100%
Wall thickness: 2mm
Cooling: 60%
Multiplier number: 1.2
Support: None 
Retraction: None

I have tried adding retraction, lowering the extrusion temp to 215C, lowering the print speed to 1000mm/min, and increasing the cooling to 80%, all with no luck. I also have a flexible filament extruder I've used, and it has had the same problem. 
I have also changed the movement behaviour to have a detour factor of 300, which has reduced the problems but still has stringing occurring in where the travel moves occur (in red).

Any suggestions are welcome, and if you could provide screenshots or printing specs for simplify3D, that would be wonderful. 

I appreciate any help you can provide. Thank you!


xh l

Nov 25, 2021, 6:51:41 AM11/25/21
to Soft Robotics Toolkit Forum
hello,I had a similar problem before. I was using an older version of Cura, then I switched to the latest Cura, and the problem was fixed. If you don't want to try Cura, you can try speeding up the printer's backpumping speed, hopefully that will help you.
Reply all
Reply to author
0 new messages