I recently am trying to print NinjaFlex, but the vanilla extruder block just won't work...
I tried to download other extruder blocks from thingiverse, but seems like my extruder block cam with a bigger wheel...
So I just designed my own.
I'm such a big fan with 3d printed springs, so I decide to make one that utilize least external parts.
for this, you need:
- wheel x 1
- 5mm (or 7mm) M3 screw x 1
- 10mm (4mm outter / 3mm inner) copper pipe x 1
- 20mm M3 screw x 1
- 7mm M3 screw x 1 (less than 10mm including its head)
This is more like a "proof of concept", I'm still adjusting the tension of spring.
I printed this with PLA, but it should work with ABS too.
you might get a "softer" spring if printed with ABS, if that's so, just insert some paper between the holder and the spring...
I also printed this with 100% infill, but that's just because I think it looks better with transparent filament, but in fact 25% ~ 40% infill shall suffice.
however, most of the parts are shells, so infill just really don't do a big deal here...
I printed the base block with support to get a better round hole, because I don't have a decent cooling, yet.
If you have a better cooling, might just be able to print it without support.
The tail of the spring is not a easy print, it sometimes just "pops-off" the heatbed (60c).
You may want to print the first layer with a turtle speed (15 ~ 30mm/s) and a higher temperature (215 ~ 220C), and finish the rest of the layer with normal speed/temperature (60mm/s + 190C in my case).
Or, just apply kapton tape / gluestick / hair spray or whatever.
I printed directly onto the glass, just because it looks good :-D
print @ 0.1mm layer height to get the best precision, but 0.2mm would work.