3D printing

Printing with Ninja Flex filament using Ultimaker 2

We are having improvements and the best settings so far are:

Print speed: 20
Printing Temperature: 220
Bed Temperature: 65

Retraction speed: 25
Retraction distance: 3

Travel speed: 100


Also the best way to feed the extruder is from the bottom, maybe now it doesn't look so fancy, but it's working :)
You can see the last results on the images bellow:



I have been using ninjaflex for a while and trying more different settings, for models that have large surfaces and the volume is made with an interior grid, I have to slow down the speed with the pugin "Tweak at Z" at least 3 layers otherwise you will be able to see holes that weren't covered totally.
After to identify the layer (layer view) when the model goes from the grid to a solid surface I slow down the speed to 50%. The faster speed that I have tried and works pretty well is 40mm/s, so it will be 20mm/s to have a smooth final surface.
You can appreciate the difference in the image below:

left: same speed the whole process right: slowing down the speed from layer 25 to 28

left: same speed the whole process
right: slowing down the speed from layer 25 to 28

Last settings used successfully: 

Layer Height: 0.1
Bottom / Top thickness: 0.3
Fill density: 20

Print speed: 40
Printing Temperature: 224
Bed Temperature: 65

Retraction speed: 45
Retraction distance: 4.5

Travel speed: 200
Bottom Layer Speed: 20



work in progress....

photo 1.JPG

Testing materials, shapes and LEDs

This research shows different shapes for spikes that we can sew to the fabric to cover the arm band with the sensors and the electronics. We started to work in a modular way to get the look we are looking for. Also we are working with soft materials to make it safe for kids.
Some materials include leather (grey) and ninja flex printed in our new 3D printer (Ultimaker2).

The final shape allows us to include LEDs inside this spikes with a great look. This material is great spreading the light, you can see the images bellow.

more iterations.
Following the modular line, we are working in joints that can be easily attached and sewn to fabric. 3D printing another piece on PLA (blue) seems like it's working good.

Last version, not printed yet, includes holes to sew the PLA piece to the fabric, see last image bellow.