[modeleng] Re: Belt tensioner

Hi Shep,

I agree with John, in your case the slack side is the back side. If you put 
your idler there it will work best.

Cheers Jeff


>From: "John Pagett" <john_pagett@xxxxxxxxxxxxxxxx>
>Reply-To: modeleng@xxxxxxxxxxxxx
>To: <modeleng@xxxxxxxxxxxxx>
>Subject: [modeleng] Re: Belt tensioner
>Date: Sat, 29 Mar 2008 12:13:04 -0000
>
>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
>
>----- Original Message -----
>From: "Jeff D" <jeffdayman@xxxxxxxxxxxx>
>To: <modeleng@xxxxxxxxxxxxx>
>Sent: Friday, March 28, 2008 10:44 PM
>Subject: [modeleng] Re: Prices
>
>
> > Hi Shep,
> >
> > Glad to hear the knee surgery went well.
> >
> > With regard to your idler, be sure to put it on the loose side of the 
>belt
> > run. Between the motor and the driven pulley or pulleys the motor will
> > pull
> > the belt in tightly. Don't put the idler on one of these tight runs. You
> > want your idler on one of the slack runs after the last pulley has been
> > driven and before the motor pulley. This is especially true with a back 
>of
> > belt idler.
> >
> > Good luck with it.
> >
> > Cheers Jeff Dayman Waterloo Ontario Canada
> >
> > getting warmer but had snow flurries yesterday and still 12" or more of
> > snow
> > on the ground.
> >
> >
>
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