Ever wonder how tight your belts should be on your printrbot or any 3d printer? Well thanks to redditor /RememberToBackupData, somebody posted a good way of doing this.
I use a guitar tuner app to help me get my belts consistently tight. I traverse the stage or arm so that it's furthest away from the belt tensioning screws, and then I strum the belt and ballpark the sound around 150 hz. Do note that I just picked 150 hz arbitrarily; I couldn't find any advice about how tight a belt should be except the eminently helpful, "Not too tight and not too loose." I think the design of the Simple makes perfect belt tightness unimportant, but I feel that having a benchmark for consistency is a good idea.
There is now a gates mobile app called Carbon Drive that also has a frequency measuring tool. For my core-xy machine I tune in the belts around 46hz. Just pluck in a quiet environment. Make sure to not have fans on or you'll get a bad reading.
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