I plucked the longest free span at the center and recorded several plucks. In both cases I moved the carriages near one end of the axis (but not resting against the hard stop at the end). Here is an mp3 recording of plucking the X axis belt I don't have experience with these exact belts but other belts I've used in industry such as multi-v (poly-v) belts must be installed with higher tension than what you desire because they drop 10% or 20% shortly after installation. The belts are lower tension now which is what I guessed might happen. Y axis 74 Hz (was 83 Hz when freshly assembled) X axis 88 Hz (was 103Hz when freshly assembled) Does anyone else have a measurement reference or suggestion for tension using this measurement.Īnswered: Re: Use free span frequency (Hz) to check and set belt tensionĪfter a few prints I checked the tension again However, since I don't know the desired tension in Newtons for now I'll just use this relative reference. If one weighs the belt and measures the free span and then does the math. To check I turned the printer over and with the phone close to the bottom span (the long span) and strummed the belt (like a guitar). I set my belt tension to my best guess and it measures 83Hz. This is common practice in industry.Īnd there are many others that would work.īack 'in the day' there were expensive meters from the manufacturers but now this technology is free if you already have an Android or iOS device. I am curious why the belt tension specification isn't taking advantage of span frequency measurement. Use free span frequency (Hz) to check and set belt tension
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