[modeleng] Re: Belt tensioner

Hi John

Thanks for your prompt reply.   I had palnned to tension the belt on the 
back section - so am much relieved to find that this is corrrect.

What a friednly and useful List this is!

Thank you again

Cheers!!   Hubert

----- Original Message ----- 
From: "John Pagett" <john_pagett@xxxxxxxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Saturday, March 29, 2008 12:13 PM
Subject: [modeleng] Re: Belt tensioner


> Hubert,
>
> If I follow your description correctly, then the motor is "pulling down" 
> on
> the front section of the belt between the two pulleys - assuming
> conventional lathe rotation(!). This means that the belt at the back is 
> the
> "slack side".
>
> Here's another way to think of it. Put a chalk mark on the belt, and turn
> the motor by hand in its normal direction. When the chalk mark has gone
> around the motor pulley and is heading back towards the mandrel, that's 
> the
> section of belt to put the tensioner on.
>
> Hope that helps.
>
> JohnP
> ----- Original Message ----- 
> From: "Shep" <shep.28@xxxxxxxxxxxx>
> To: <modeleng@xxxxxxxxxxxxx>
> Sent: Saturday, March 29, 2008 11:28 AM
> Subject: [modeleng] Belt tensioner
>
>
> Hi Jeff
>
> Thank for this kind advice.   I am a stupid old man, and am finding it
> difficult to follow your instructions.
>
> My set-up is as follows:   The mandrel of the lathe has a  five-groove
> poly-vee pulley cut directly into its 20mm diameter.   This is the driven
> pulley.
>
> The belt goes down vertically to a motor below the lathe, which has a 
> driver
> pulley.   With this set-up, where do I place the tensioning ball-bearings,
> which will run on the outside of the belt.
>
> Which is the 'slack side' on this set-up.
>
> Your kind advice will be much appreciated, before I start cutting metal.
>
> Cheers!   Hubert
>
> 

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