bvandiepenbos wrote:awesome design.
would love to see you build one.
what is the purpose of dual pulley and what looks like a second belt at the bottom?
Thanks. I am planning on building at least one for my brother-in-law (already have most parts printed) and maybe a second for myself.
There is only one belt in the system. The reason for the additional pulley at the base of the towers is to spread the belt out to be the same width all the way to the top to the idler. I didn't want to induce any error from having the belts run at an angle to meet the idler's diameter since the 20T pulleys are smaller.