Re: [CAD_CAM_EDM_DRO] Re: drive belt idler

One thing that should be considered when using an idler upon a belt is that they are intended for a belt that travels in only one direction. A fundemental principle in engineering regarding belt and chain power transmission is that an idler only be utilized on the slack side of the sheave/belt, sprocket/chain configuration. A bi-directional belt/sheave configuration would fall into a category making an idler improper. Of course it all depends on the load but, belts and chains should not be pulled over idlers under load. Their purpose is to remove slack on the slack side. Not that this really applies in this case. Just wanted to mention it.

Ron

Thomas Powell <tppjr@...> wrote:

The motor plate is slotted and adjustable but only about 1/4". There are
two belts lengths close to what I need, 134 and 142 toothed. The 134 is
.45" too short and the 142 is .33" to long. I am going to get the 142 and
take up the slack with the idler pulley. I am using HTD 15 mm belts.

Thomas

----- Original Message -----
From: "turbulatordude"
To:
Sent: Sunday, October 24, 2004 8:34 PM
Subject: [CAD_CAM_EDM_DRO] Re: drive belt idler



>
> Interesting. I mounted as stepper in such a way as to be on a plate
> that had curved slots in it and used a 1/4 inch bolt as the hinge.
>
> If you are doing this on a rotary you are fine. But if you are doing
> it by hand, those lines will look awfully out of alignment.
>
> From some printers I have idlers on bearings on a single plate, not a
> square. Two holes, one slotted the other as the hinge.
>
> I didn't see a post indicating the belt size you were looking for ?
>
> Dave
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Addresses:
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OFF Topic POSTS: General Machining
If you wish to post on unlimited OT subjects goto: aol://5863:126/rec.crafts.metalworking or go thru Google.com to reach it if you have trouble.
http://www.metalworking.com/news_servers.html

http://groups.yahoo.com/group/jobshophomeshop I consider this to be a sister site to the CCED group, as many of the same members are there, for OT subjects, that are not allowed on the CCED list.

NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM. DON'T POST IF YOU CAN NOT ACCEPT THIS.....NO EXCEPTIONS........
bill
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