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Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Fri 16 April 2010, 03:54
Replies: 23
Views: 32,731
Posted By Gerald D
As Ken says, 20X20 could work, but you have to...

As Ken says, 20X20 could work, but you have to proceed very carefully. Also be careful at the gantry where you are maybe using 52mm wide tubes instead of 50mm wide tubes . . . . the y-car must still...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Wed 24 February 2010, 20:27
Replies: 23
Views: 32,731
Posted By Gerald D
Ries, that explanation ignores the metric world...

Ries, that explanation ignores the metric world that uses the concept "module" to define the "coarseness" of the teeth.
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 30 January 2010, 03:02
Replies: 23
Views: 32,731
Posted By Gerald D
A typical mod 1 rack is a square bar of steel 15...

A typical mod 1 rack is a square bar of steel 15 x 15mm. A typical mod 6 rack is a huge square bar of steel 60 x 60mm.

Does this help?
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Fri 29 January 2010, 21:34
Replies: 23
Views: 32,731
Posted By Gerald D
Please read before starting a new thread! :mad: ...

Please read before starting a new thread! :mad:

Rack and Pinion - understanding Diametral Pitch (DP) vs. module (http://www.mechmate.com/forums/showthread.php?t=1871) <-----this thread
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Mon 02 November 2009, 08:43
Replies: 23
Views: 32,731
Posted By Gerald D
See: http://www.sdp-si.com/D190/HTML/D190T109.htm...

See: http://www.sdp-si.com/D190/HTML/D190T109.htm

Diametral Pitch = The number of teeth of a gear per inch of its pitch diameter (teeth per diameter)

Module = amount of pitch diameter per...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Sat 22 August 2009, 08:54
Replies: 23
Views: 32,731
Posted By Gerald D
If I use rack at module1(15x15mm),what is the...

If I use rack at module1(15x15mm),what is the popular teeth of pinion gear?
Somewhere between 24 and 36 teeth. 24 will be a bit smoother, 36 a bit faster in soft material. Doesn't make too much...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Mon 29 June 2009, 11:15
Replies: 23
Views: 32,731
Posted By Gerald D
20 teeth, module 1, is too small for a 15mm...

20 teeth, module 1, is too small for a 15mm shaft. Check the dimensions yourself. It is okay to mix the gear pinion sizes. Actually, they are not expensive, you can buy some different sizes for...
Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains Mon 29 June 2009, 09:56
Replies: 23
Views: 32,731
Posted By Gerald D
Claus, if you want max speed with slightly lower...

Claus, if you want max speed with slightly lower cut quality, use 36 teeth module 1. If you want slightly lower speed and better cut quality, use 24 teeth module 1. The differences are not as big as...
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