Is it normal to have to hammer in the nuts on the 3d printed belt spacer for 4.1? And if it is, why does it keep breaking the little flex spots, and how do I fix it? Size it up 101% or something?
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Can you link to the part that you are talking about? I’m not sure which bit that is
I think he is referring to the belt ends where the holes for the nuts are not
deep enough for the nylock nuts, if you try to push them in far enough to not
stick out, it will damage the belt ends.
The next time that you make molds for them, there are a couple changes to make
-
make them just a little thicker so the nylock nuts will fit.
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change the belt path to not have a sharp corner on the inside, it makes it
MUCH easier to install the belts.
David Lang
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I was referring to the belt guard for the 4.1 upgrade sorry
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It’s hard to design things which are sized right for nuts like that for both 3D printing and injection molding. In theory they both make parts that are exactly the same size as the 3D model, but in practice nothing really does, so those parts were designed for injection molding.
Let me see if I can wip up a version that is easier to modify
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Here’s a parametric version which you can customize to fit the nuts correctly for your 3D printer:
https://abundance.maslowcnc.com/run/BarbourSmith/Belt_Guard
You can adjust the nut hole size here and then download the .stl file:
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Thank you soo much I really appreciate it
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When I size it up it cuts more material off the outside and makes the support slits of material left in the nut area very slim, is there any room to beef up the legs on the outside before it starts hitting the gears or the belt so it doesn’t get so weak when I size up the holes?
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You will start hitting the belts if you go much bigger, but that shouldn’t be too big of an issue.
How big are you needing to go on the nuts to get them to fit?
I sized it up from 6.5 to 7, and they seem to fit now and tighten down, but the sides break rn really easily when I tighten it down because it took more material out of the sides so maybe an extra.5 or .25 mm per leg if it wouldn’t cause problems?
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I added a tunable parameter for the post size too, let me know if that seems to work. The link is the same:
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Thank you, I really appreciate it
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