Here comes the Cable Eater 2.0.
Now with (or without) self-blocking system, a lower profile, arrows, windows on top to adjust the new snap-fit system....
4 models available :
- Small simple
- Medium simple
- Small self-blocking system
- Medium self-blocking system
For 2m long, 3mm thick cables -> I suggest to go for the medium simple
Self-blocking system might be annoying when it comes to uncoil your cable...
Lenght gain : still up to 99% with a standard 2m long wire !
Enjoy cable reduction !!
Thanks for the feedbacks, keep it going.
Working with PLA, but ABS with its flexibility might be easier to assemble, PLA/PHA is a great solution.
As there are some snap-fit parts, I would recommend to print at low speed (40mm/s and 25mm/s for small perimeters).
For a smooth finish prefer 0.1mm layer height, but 0.2mm will do just fine.
About the infill : As the A and C parts are pretty flat and large, you may want to keep a high density (75-100%).
However B part infill can be reduced to 50%, but keep in mind that this piece will need to be strong and a bit flexible (mine was printed at 100% PLA, it's quite strong but not very flexible).
Heated bed is recommended for PLA to avoid wrapping issues.
Printing time (0.1mm - 40mm/s - 75%) :
A part : 2h30
B part : 15min
C part : 2h15
Take the A part, and put your cable in the center
Block your cable using part B, snap-fitting it on the A part pivots.
Snap-fit part C pivot to the part B center hole.
/!\ Make sure your cable is passing between the 4 little 'teeth' of part C /!\
Rollup your cable by holding Part C in one hand (part C should face the ground), while turning Part A CLOCKWISE (turning the other way might damage your cable) till the desired lenght !
To unroll your cable, do not turn the parts, it's not necessary. Just hold the 2 strands with both hands, and pull.
3D Print snap-fits
Snap-fit parts was a bit challenging to achieve...
I first designed vertical clipping parts (Lego brick system) but the inside pressure generated by the cable being coiled was enough to disassemble the model.
I then tried to design snap-fits based on Eiki Martinson and Jon Lusk's research (http://eikimartinson.com/engineering/3dparts/pivot1-m.jpg). But didn't managed to print it well (and strong enough) with PLA. As I wanted an easy printable model, I decided to look for something else.
Finally, I solved my problem while sleeping (as often) and came out with a simple horizontal snap-fit design (part B). Easy to print, reliable, strong (I hope in long term), and quite easy to assemble.
If you try to design and print snap-fits, keep in mind that FDM technology has limitations regarding both raw materials (quality, strenght, flexibility) and precision, even if we tend to prefer thinking that it's revolutionnary and limitless !