Getriebegelenk d357|16
ratio ~ 100:1 / 1Turn ~3,6°
cogs:
basisring=60;
outputring=59;
planetbase=25;
planetmiddle=13;
planetoutput=24;
sprocketcenter=21;
STLs: https://drive.google.com/open?id=0B5VJ2dMW1zNiTFh0dEFmaTJQSVk
importand – if you print this, mark the position of each gear (rotation) as they only fit proper in ONE position!
nicely done! The handle looks tricky to print and might be easier if cut into two, three or four pieces. What program did you use to create this model? Would it be possible to get the source files? Thank you.
@Fred_U Right the handle is a mess, and you are absolutely right that this needs to be printed in two parts (with the cog fitting also used for the planets). The first try to render a nice handle killed my pc by using over 46GB RAM (only have 32GB)- so i made a dirty print …
I am using open SCAD - the source files however is a bit tricky as i have several libaries included (some self written bit unconventional as some using layer some mm) and it is not a nice/cleaned code i would like to share. But i like to point you here http://www.thingiverse.com/thing:1604369 where Dr. Jörg Janssen done a great job with the modules i used to build upon.
I’m glad to hear you use OpenSCAD for this. It’s a great program, even though I am probably worse at coding than you!
its all learnig by doing - but my code would be a bad influence and it is a mix of german and english and designations which make only sense to myself (sometimes) , I already have issues when reading older project code • which is why i already try to make formal better code…
Your approach is identical to mine. Do something, make mistakes, fix mistakes, do something again. I would agree that if your code includes german, I would not be able to use it. The link you provided appears to have german roots as well and I fear I won’t be able to read it.
Many OpenSCAD coders have great programming strength, making their code impossible for a non-coder like me to fully understand, so the “try something, try something else” approach is all I have.
With respect to your project, you’ve noted that you use 5mm bearings. I have a surplus of 10mm bearings and hope to be able to identify that location, in order to fit. Alternatively, the ring that holds the bearings is simple enough that I should be able to construct one from the start.
just scale the whole thing to 200% so 5mm become 10mm, but you will also have doubled the clearance. As later the planets will press everything together that shouldn’t be too bad.
double scale would mean twice as much or four times as much filament used, yes? I’m sure if I decide to build it, I can build the ring easily enough, especially with OpenSCAD.
I just checked what happens and you need to tweak much more than this, as the diameter of the bearing need to increase aswell, else it will be too close to the cogs, further the hight need increase to get 10mm in -that means all gears need to be shifted up … in the end you will need much more filament. Maybe you try scaling 130% and replace the bearing part with a thicker ring holding the 10mm spheres … you also need a new bearing ball spacer (Kugelkaefig).
Easier for me to get 5mm balls! I’m not yet decided to build.
… if a cube 1×1×1=1cm³ is scaled 200% (×2) it will be 2×2×2=8cm³ so volume is times 8 (2³) BUT filament usage is based on infill and surface. The model has (without Handle) ~80×80×10mm and uses 8m filament. At 200% my slicer (cura) is telling me you’ll need about 38-43m (depending on infill pattern / all at 10%, a change is needed as the concentric pattern didn’t support the bearing groove at that scale))
