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Torque Driver for Calibrating Belt Tension
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Simple tool to calibrate belt tension based on clamping force vs torque of screw
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Torque driver for setting correct tension on 6mm belt on 3d printers. It is designed to limit torque- hence pulling force, on an M3 screw. Tension is calibrated using a fixed weight (1.25kg). The weight is based on the figure described in Lost in Tech's video https://www.youtube.com/watch?v=zoKmmT0a7jk
If you wish to tension the belt via the idler pulley, double the weight in calibrating the driver.
Belt tensioner used is available here
Build Guide.pdf included
Hardware required:
- Spring from a retractable ball pen (clicky pen) 4.5 mm diameter x 20 mm long (relaxed)
- Steel ball x 2- 6.35 mm or 1/4 inch diameter. Soft air 6mm BB pellets can also be used although the sound will be softer.
- M3 Allen Socket head screw - 25mm or longer with full thread
- M3 nut
- For calibration piece, M3 Allen socket head screw 25mm or longer, flat washer and nut.