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Originally Posted by sanddrag
I need to tension chains and cannot use the method of sliding one sprocket. The sprockets are fixed. I need to add an additional adjustable roller or something. The tensioning roller itself cannot be a sprocket though due to space and time constraints. The tensioner can only be supported on one side. Automatic (spring loaded) would be nice but not absolutely necessary. The chain is running between two sprockets only. Due to space constraints, I need to push/pull it apart to tension. To room to push/pull together. All parts must be fabricated or purchased locally due to time constraints.
... [shortened to take up less room]
So, basically, I'm desperate for ideas. Pictures are worth 1000 words.
Thanks so much.
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Why not use something really simple, like a piece of HDPE or delrin rod with an off-center hole in it? My team (228) has used this successfully for the past two years, and it works great. Plus, it is: 1. Easy to manufacture. 2. Can be cantilevered. 3.
Simple! Here are some diagrams/pictures of it in use on our 2005 robot:
