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Using thornton cutters and measurments #145
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You can adjust the teeth height with the head parameter and the root can be adjusted with the clearence parameter. |
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I'm drawing clocks and has the problem that the measurments of the gears aren't completely ok. I'm using the Thornton tables and formulas.
For instance:
Gear with 100 teeth and a module of 0,8.
The outside or tip diameter should be 82,2 mm (teeth+2,76)*module. In FreeCAD it ends up at 81,7 mm!
The root diameter should be 76,8 mm (teeth-4)module. In FreeCAD it ends up at 77,99 mm!
The teeth width should be 1,256 mm (1,57module). It is 1,23 mm! This widt is also on at to large root diameter.
Is it possible to make the cycloidial gear part to be custimized.
I know that a lot of great guys are building FreeCAD and all off the Addons. But this extra feature should be great.
If interested I can supply the thornton formulas. They are also depending on the module and the number off teeth with pignions (teeth <= 16).
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