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Meshing with lantern pinions - Part B

Due to my zealous output, I have been 'advised' to split the original thread.

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Sam Stones23/04/2019 00:57:03
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619 forum posts
209 photos

As a convenience, here is roughly where Thread Part A ended

290-&-8---lantern---meshing---offset---0.1mm---1.jpg

290-8---five-trace---cycloid-versus-lantern-pinions---02.jpgTo conclude, perhaps I should have carried the exercise to include deepening the meshing, i.e. crossing over the two PCD’s. However, I’m inclined to think that the results would be fairly obvious in that the teeth/leaves/pins would soon clash.

Unlike the previous exercise where contact of wheel teeth and pinion leaf flanks produced slight changes of contact traces (especially the ‘On centreline and 0.1mm offset), the round pins of the lantern produced smooth curves. Similarly, as here …290-8pin-(cycloidal-&-lantern)---pressure-angle-comparison.jpg

… the cross-overs of the pressure angles are less severe.

Finally, and despite my own luck, only slight changes in depth from the theoretical (i.e. less than 1.0mm) suggest that depthing, at these sizes in particular, needs to proceed with extra care. No doubt for those with depthing experience, you will recognise how the meshing behaves. Too deep and there will be a gnashing of teeth? Too shallow, more gnashing?

Links to both albums are here …

Meshing with Cycloids

https://www.model-engineer.co.uk/albums/member_album.asp?a=50467

Meshing with Lantern pinions

https://www.model-engineer.co.uk/albums/member_album.asp?a=50528

Thanks for everyone who helped.

Sam smile d

Apologies if this mesh came unstuck.

Michael Gilligan23/04/2019 07:03:10
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12908 forum posts
555 photos

Blessed are the Lantern Pinions ... for they follow the true path

angel MichaelG.

Sam Stones23/04/2019 20:05:45
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619 forum posts
209 photos

Where would I be without your help Michael?

Sam disgust

I've removed my dark glasses, and can hear much better.

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