On 01/11/2013, Tomaz T. <tomaz_...@hotmail.com> wrote:
> This could be solution to gain gearing ratio in combination with timing
> belt...
>
> Where would you place tensioner(s) to get rid of backlash ... ?
>
> http://picpaste.com/pics/Gearing_01-X1NbZKYn.1383331283.jpg                   

I am inclined to say now you have three problems with that arrangement

small gears to large gear (involute error)
basic belt accuracy or not (although this is divided and reduced)
belt to belt timing pulley backlash

Your backlash of the small gears can be adjusted with an idler on the
timing belt between the two larger timing pulleys

Dave Caroline

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