Wrapping a swept profile around a cylinder in Alibre Atom

[Neil WyattModerator @neilwyatt]

Oops… should have read on…

Neil

[Ady1Participant @ady1]

Posted by John Hinkley on 26/09/2023 20:52:41:

Well, I've only gone and done it! Or rather, Jason showed me how and I implemented his suggestions.

Well done you. That was a tough one.

[Swarf MakerParticipant @swarfmaker85383]

In answer to the question raised by John Hinkley, F360 can also wrap and extrude complex profiles as a single action, as shown by this gearbox camshaft.

[Ady1Participant @ady1]

Found an easier fast dirty way of doing it because it was really bugging me, this covers 50% of the cylinder

Use the sweep function with a plane on the top surface and cut it DEEP so your full cut depth is achieved at the edges

Then fill it back up inside to your required depth with an extruded cylinder boss and voilla! a perfect depth cut along the entire length

The geometrics of the cut aren't perfect except along the centreline but its a handy workaround

Edited By Ady1 on 27/09/2023 04:34:57

[JasonBModerator @jasonb]

Won't really work ADY as the slots need to be radial otherwise what runs in them will just jam.

[Ady1Participant @ady1]

I wouldn't use it for Concorde turbine blades but could be used for writing lettering or any less critical apps

The CAD user would need to decide

[John HinkleyParticipant @johnhinkley26699]

Just to round this off and put it to bed, this is what the gearing/selector mechanisms looks like inside the case. Still missing are the gear selector forks – still to be drawn, but now that I've got the relative positions laid out, I can start on that.

The gear selector tracks were reasonably easy to set as I'd initially drawn them in 2D and measured the overall length. I then converted that from circumference to a diameter and rounded it up to the nearest convenient size. In this case it was 25mmØ.

Thanks, once again to all who contributed suggestions and especially to Jason for setting me off on a feasible solution.

John

[John HinkleyParticipant @johnhinkley26699]

Here’s one I did earlier, to coin a phrase.  It’s moved on a little from this but is substantially the same except in some minor details

I’ve 3D printed the parts shown except the differential. I’ve 3D printed the parts shown except the differential – most several times mainly because of errors to do with my inexperience with printing.

John

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