Lyman Filament Maker Calculations: Difference between revisions
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=Torque= | =Torque= | ||
*The extruder motor has a 168 fold geardown. It has a 173 kg-cm torque! [https://www.phidgets.com/?tier=3&catid=19&pcid=16&prodid=315] | *The extruder motor has a 168 fold geardown. It has a 173 kg-cm (1730 N cm) torque! [https://www.phidgets.com/?tier=3&catid=19&pcid=16&prodid=315] | ||
*3000 N cm torque stepper - $60 - [https://www.omc-stepperonline.com/geared-stepper-motor/nema-23-stepper-motor-bipolar-l56mm-w-gear-raio-151-planetary-gearbox-23hs22-2804s-pg15.html]. That is about 300 kg cm. | *3000 N cm torque stepper - $60 - [https://www.omc-stepperonline.com/geared-stepper-motor/nema-23-stepper-motor-bipolar-l56mm-w-gear-raio-151-planetary-gearbox-23hs22-2804s-pg15.html]. That is about 300 kg cm. | ||
Revision as of 19:27, 18 September 2018
Torque
- The extruder motor has a 168 fold geardown. It has a 173 kg-cm (1730 N cm) torque! [1]
- 3000 N cm torque stepper - $60 - [2]. That is about 300 kg cm.
Stepper has over 2x performance to cost ratio
The torque of the Precious Plastic shredder is recommended at 70 rpm with a 1/4 hp or higher motor. Using the Motor Torque Calculator, that comes out to 2800 N cm. The stepper motor above meets this specification.
The Recyclebot motor (the stepper) has 15 geardown. Say steppers go up to 1000 RPM - that is exactly about 70 RPM if there is a 15 fold geardown.
Take a regular Nema 17 with 72 oz in torque. That is about 5 kg cm. To get to 300 kg cm - need about 60 geardown.
As a first try, it is useful to go with the 15 geardown stepper above for an initial version of the shredder.