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Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Tue 25 May 2010, 21:27

Replies: 449

Reduction Drive by belt - a collection of various designs and how to build your own.

Views: 473,546

Posted By Richards

Figuring things out is easier than you might...

Figuring things out is easier than you might think. We'll assume that we're using a 30-tooth spur gear that has a pitch diameter of 1.5 inches. We'll assume that we're using a Geckodrive stepper...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Sat 26 September 2009, 08:20

Replies: 449

Reduction Drive by belt - a collection of various designs and how to build your own.

Views: 473,546

Posted By Richards

Edgar, It looks like the 3:1 belt drive that...

Edgar,

It looks like the 3:1 belt drive that you referenced is for use with 23-frame sized motors. I would not recommend that size motor. They're just too small for the job.

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Tue 01 January 2008, 08:51

Replies: 449

Reduction Drive by belt - a collection of various designs and how to build your own.

Views: 473,546

Posted By Richards

I hope that I haven't started a panic about...

I hope that I haven't started a panic about motors and gearboxes. Let's go over the things that we can gleen from the data sheets.

- The PK296A2A-SG3.6 motor has about 320 oz*in permissible...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Wed 06 June 2007, 11:52

Replies: 449

Reduction Drive by belt - a collection of various designs and how to build your own.

Views: 473,546

Posted By Richards

Marc, There are some minor problems with the...

Marc,
There are some minor problems with the Oriental Motor's PK296A1A-SG3.6 and SG7.2 geared motors. The main problem is that the gearbox limits torque to about 320 oz*in for the 1:3.6 gearbox and...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Wed 06 June 2007, 07:23

Replies: 449

Reduction Drive by belt - a collection of various designs and how to build your own.

Views: 473,546

Posted By Richards

My goal for attaching the belt transmission was...

My goal for attaching the belt transmission was to reduce 'chatter'. The factory 'resolution' on my Shopbot PRT-Alpha was about 0.00314" per step. (20 tooth gears with a 1" pitch diameter. 1,000...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Tue 05 June 2007, 21:57

Replies: 449

Reduction Drive by belt - a collection of various designs and how to build your own.

Views: 473,546

Posted By Richards

Gerald, I couldn't find the specs for the...

Gerald,
I couldn't find the specs for the radial load on Oriental Motors, so I'm happy that you found that information. In fact, I may have been remembering data from a tech seminar that Oriental...

Forum: Driving Mechanisms: Rack/pinion, gears, screws, belts & chains

Tue 05 June 2007, 06:52

Replies: 449

Reduction Drive by belt - a collection of various designs and how to build your own.

Views: 473,546

Posted By Richards

So far there has not been a problem with the XL...

So far there has not been a problem with the XL belts. (Remember that the specs on some stepper motors specify < 8 lbs. of radial force on the shaft. The belt design keeps radial force to a...

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