1st Build, Steel, Epoxy 24"x24" for Wood

**wallyblackburn** · 09-02-2018

Thanks guys. Well, I find a ton of them on eBay - of course they are all from China and seller is away until 02/20. Oh well, I guess our friends in Asia need time off too :)

I am just looking for 1:1 I think. I just want to drive both screws from one motor. Given that I was going to pick 3 20 tooth pulleys and 2 idlers. Any reason to use more or less teeth?

Thanks,
Wallace

**Nr1madman** · 09-02-2018

Originally Posted by wallyblackburn

Thanks guys. Well, I find a ton of them on eBay - of course they are all from China and seller is away until 02/20. Oh well, I guess our friends in Asia need time off too :)

I am just looking for 1:1 I think. I just want to drive both screws from one motor. Given that I was going to pick 3 20 tooth pulleys and 2 idlers. Any reason to use more or less teeth?

Thanks,
Wallace

How about belting online? I think they are uk based?

20tooth pulleys are generally recommended here.
Good size to strength to tooth engagement.
Larger pulleys have higher inertia
Smaller pulleys have smaller boss for setscrews

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**wallyblackburn** · 08-03-2018

Well, here is what I ended up with:

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Sorry the 2nd pic is rotated (again) - but I think I figured it out now that I have one that is and one that isn't...

Anyway, I am thinking of an adjustable tensioner. Seems like a long span there on top - you guys think that'll be a problem? I really have no experience with timing belts like this.

Thanks,
Wallace

**Nr1madman** · 09-03-2018

Originally Posted by wallyblackburn

Well, here is what I ended up with:

Sorry the 2nd pic is rotated (again) - but I think I figured it out now that I have one that is and one that isn't...

Anyway, I am thinking of an adjustable tensioner. Seems like a long span there on top - you guys think that'll be a problem? I really have no experience with timing belts like this.

Thanks,
Wallace

Hey Wally!

I have no experience with such long belts, but I can imagine that the top part will flap if going fast?
A tensioner on top might be a good stabilizer ;)

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**Desertboy** · 09-03-2018

More importantly is that a Mustang in the rear of the photo? Camaro and Firebird man myself but could slum it with a mustang whilst I wait for a 67SS to drop from the sky or a 77 Trans Am ;)

The commercial printers we scrap always have tensioners on and the belt lengths are measured in inches (Short), if you can get tensioners easily enough than I'd fit them. They're sprung to apply constant tension and are adjustable.

**wallyblackburn** · 09-03-2018

Originally Posted by Desertboy

More importantly is that a Mustang in the rear of the photo? Camaro and Firebird man myself but could slum it with a mustang whilst I wait for a 67SS to drop from the sky or a 77 Trans Am ;)

It is actually a '65 T-Bird. I went to an auction with the intention of buying a '63 Impala SS, and somehow came home with that over-engineered POS. Auction fever, I guess!

I think I will try to fab up a tensioner for the top span.

Regards,
Wallace

**m_c** · 09-03-2018

I'd try the setup as is. The worst case scenario is the belt flaps far too much and causes resonance problems, and you then have to add some idler pulleys.

If it does need a couple idlers added, I would probably add a couple rollers to the top, to drop the belt down in the middle and increase wrap on the ballscrew pulleys.