Re: [CAD_CAM_EDM_DRO] Re: drive belt idler

I agree if the idler is a spring tension type. But if it is a solid mount
what would matter which direction the belt travels?

Thomas

----- Original Message -----
From: "R Rogers" <rogersmach@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, October 25, 2004 5:04 AM
Subject: 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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> OFF Topic POSTS: General Machining
> If you wish to post on unlimited OT subjects goto:
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> http://www.metalworking.com/news_servers.html
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> OT subjects, that are not allowed on the CCED list.
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> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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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
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> 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.
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> NOTICE: ALL POSTINGS TO THIS GROUP BECOME PUBLIC DOMAIN BY POSTING THEM.
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