Has anyone made a belt end with larger eyelet?
I bought the poolzilla 3/4 in concrete floor anchors, and 1/2 galvanized carriage bolts fit absolutely awesome in them. But of course the current eyelet on the belt ends do not fit 1/2 carriage bolts.
Has anyone made a larger version?!
No sorry, but good idea.
I need them a fraction flatter and was thinking of sanding them a little, but I could also print new ones… Shouldn’t be that hard to draw and print out.
Try this one:
BeltEnd1:2inch.stl (34.0 KB)
Should be printable without support.
Maybe this prints better:
BeltEnd1_2".stl (24.7 KB)
I tried to print the other one but had the wrong settings and the little pins on top came out as blobs because the layer print time was sooo much shorter… then I realized they are actually not even needed, the belt will orient the pieces too.
That will print more reliably with a chamfer around the bottom edges. Makes it less likely to elephant’s foot, etc.
Would also be easier to get the belt in the slot if it had a tiny fillet or chamfer. Thought about that a lot while getting my belts done and having to redo one that got chewed up.
I am so good with CAD and fillets, I still use an old free version of sketchup for all my digital design and i have to build all the champers from the ground up, so I try to avoid them.
For the elephant foot i use the anti elephantsfoot setting in the slicer (ideamaker4.4)
Not everyone is going to use the same slicer or printer, so designing models to be as universally printable as possible can go a long way.
Also, if you’re still using free SketchUp, you should make the switch to OnShape. It is much nicer, and still free for the level of usage that you’d need. I was able to knock this out, compound fillets and all, in under an hour: Onshape (I didn’t make the parametric model I built it off of, just the interior of the bin).
Belt Anchor (Half) - 3_8 inch.stl (221.9 KB)
Belt Anchor (Half) - 1_2 inch.stl (221.9 KB)
Onshape File:
Traced the uploaded STL in Onshape and added a fillet and some chamfers to help with print reliability and act as finding features, as well as an inset for the nut so they are able to be inset like the original design. I would print with support to make that inset clean; luckily that support material is the material that would have just been in that same space anyway without the inset, so it’s just adding the effort of popping it out.
you should round the hole to the slot
it makes it MUCH easier to insert the belt as you don’t need to fold the belt into a sharp bend at the end of the slot
just copies the workspace and edited sketch 2 and everything ‘just worked’
Good catch, much appreciated.
Belt Anchor (Half) - 3_8 inch.stl (221.9 KB)
Belt Anchor (Half) - 1_2 inch.stl (221.9 KB)
I’ve updated the previous link to point to this new file as well, on the off chance someone clicks back there.
Cool, and thanks. You did all that to stl file I put up? I think you used my file as a template, right? I will try out onshape. I have tried other CAD software but most are too different to what I am used to. The whole work order is different. Looks like the Onshape is combinable with sketchup so I might get around that. Use sketchup for the general shape and then Onshape for the fillets… Any way thanks for the work.
Good idea:
But I printed my new belt ends yesterday without the rounding and they weren’t hard at all to put together. I think I made the slot too wide. The slot in the original is (measured by hand) 2.4 mm wide. The slot in my design was copied of of a picture from the build guide and so my design if off by a little and the slot came out 3.1 mm wide (measured on the actual print, in the STL file it is 3.3mm). I think @Carson_Barry’s design might have the same flaw because I think he just altered my file…
All together with the rounded slot hole it might get too loose.
Anyway the idea is great but maybe @Carson_Barry or you can make the slot narrower. If I have to do that in Sketchup it is almost easier to do the whole thing over again, especially if i had made it with the fillets… (Sketchup was never meant for CAD in this way)
Thanks for all the tips and reactions!
a gt-2 belt is 1.5-1.6mm thick, so a 3.1mm isn’t going to force the teeth to
mesh together (the teeth are ~0.75mm tall), 2.4mm is about right, in theory you
could go just a little thinner, to ~2.2mm or so if you want a very tight fit.
David Lang
I imported it into sketchup and traced it. The file from sketchup is a bit low-poly, so it would have printed with facets around the large curve around the bolt-hole, at least based on what I saw in my slicer.
I’ll modify the file and update my links today when I get a free moment.
[Update] Done.
Belt Anchor (Half) - 3_8 inch.stl (221.9 KB)
Belt Anchor (Half) - 1_2 inch.stl (221.9 KB)
You beat me to it with your update but this was the answer i was preparing:
Then it is a trace of a trace, could be ok, could be way of… Anyway thanks for the tips and the work. While you’re at it could you make one with the 10mm (original size) hole too? My best effort: and in skype file so you don’t have to trace it from the stl:
BeltEnd.skp (5.5 MB)
And just to make it complete also the one with the 1/2" hole, then slot made narrower to be like the original and the corners of the inner slot rounded like @dlang suggested. Also i checked the length of both to match the original (from belt entrance side to middle of hole 30mm)
BeltEnd1:2".skp (5.5 MB)
PS both are scaled at 1000% for more detail in sketchup. I scale them down to 10% in the slicer.
Thank you for your help! I Installed yours yesterday, and they fit perfect in the belts, and perfect over the carriage bolts!
Thanks a million!
The 3/8 file actually has 10mm holes, so it should fit (albeit snugly) on 10mm bolts.
Belt Anchor (Half) - 10mm.stl (221.9 KB)
Here’s one with 10.5 mm holes that will have just slightly more clearance (just as much as the 3/8 file would have for 3/8 bolts).
I’ve also added this to the Onshape document as an additional workspace.
