generating gear part

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J-J
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Re: generating gear part

Post by J-J » Sat Dec 31, 2016 10:18 pm

tried that, but not sure they'd work properly. This is experimental I guess!
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gear set.jpg
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Husky
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Re: generating gear part

Post by Husky » Wed Jan 04, 2017 8:45 pm

J-J wrote:tried that, but not sure they'd work properly. This is experimental I guess!
Happy New Year
gear set.jpg
I guess you are right! Thanks for the test - looks like it was a kind of fiddling to use it with a m=2.5.

I work with an extern Gear Generator and would like to see it equivalent (at least) replaced by QCAD. It looks like I have a
reason to be optimistic ... :wink:

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caigner
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Re: generating gear part

Post by caigner » Mon Sep 24, 2018 9:29 am

Two gears mesh if the module is the same.

It would help if we could enter the module instead of the pitch diameter. Then we would always get gears that work together.
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CVH
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Re: generating gear part

Post by CVH » Sun Jul 31, 2022 9:40 am

caigner wrote:
Mon Sep 24, 2018 9:29 am
It would help if we could enter the module instead of the pitch diameter. Then we would always get gears that work together.
Agreed, when designing meshing gears one uses the same module ...
Looking at the script and the used equations we will always get a circular condition.
Or we define the module and get a certain diameter of the pitch circle for a number of teeth ...
... or we define the pitch diameter and may get an odd module ...
... or a fractional number of teeth ... :roll:

All apart from the fact that the involute curve is approximated by line segments ... :(
Pity that Matfie (Iain Hibbert) didn't finish this:
https://qcad.org/rsforum/viewtopic.php? ... 594#p16763
https://qcad.org/rsforum/viewtopic.php? ... 757#p21757

I was initially looking 'If' and 'Why not' ScriptItems store the last options that were used.
In general they do not, some retain their setting in the same QCAD session, some always return to their defaults.

It seems that we could enhance some existing ScriptItems ... If time permits.

Regards,
CVH

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