We were debating whether a floating tensioner (leaning to toward one manufactured by McMaster-Carr Model #5973K2) would work on a chain with a slight angle…we called the customer service and they didnt know so we wondered if anyone ever used on a chain path not parallel to the ground…if so how efective
Love, Peace, and Robot Grease
Team 2582 PantherBots
I’ve seen those work on two sprockets of very different size when they chain is intentionally looser, so that tensioner pulls the chain very close together, a distance apart that is less than the pitch diameter of the sprocket I imagine.
I would use something similiar to what we used last year. It worked very well and cost about $6-$10 per tensioner. It was a skateboard wheel with a bolt going through it pulled back by two stiff springs. Just fingue out a way to mount it at the angle you want. (trust me. I do this for racing motor cycles quite a bit)
Srpings are from Ace
Long bolts we had
Got a $10 kiddie skateboard from Walmart and too the wheels off.
Wonderful! Things don’t have to be really high-tech to work well, eh? The point of a conventional chain tensioner is not really to “tension” a chain, so much as to prevent slack from derailing it. A rigid tensioner on a bi-directional drive system does help eliminate lash…
If you have the resources to machine to close tolerances and you space your wheels by an integer number, you will not need tensioners until the chain stretches and then you can just replace it. I would personally not run without tensioners but it can be done. I would rather tension then replace but some teams are ok replacing chain more frequently for the weight savings.
we are closing in on 11 months without replacing our chains on our 2008 robot. and not one problem. also as Adam stated it saved us from making all other tensioner associated parts. I predict the drive chains lasting at least 5 years on this year robot.
they were loose to begin with and they are even more loose than when we started but with 180 degrees of wrap they are still working fine. as for the spacing, we use #25 chain so the axle spacing is just a dimension divisible by .250 or 1/4".