Motivator
Description
This is a motor driven gear reduction unit that provides a low but variable speed output shaft to test this and that. Print all parts in the position they appear when downloaded. After Motor_Mount_Lower is printed use your wire cutters and turn the 4 mounting holes into slots so motor can be moved sideways a bit. Depending on how good your printer works you can adjust motor pinion to engage the gear train correctly. Motor is generic, available from sciplus.com. If you use a smaller motor just shim it up until shaft aligns with gear train and you're good to go. -I power the motor with an 18v 1 to 2 amp 'wall wart'. -Speed is regulated with a small PWM controller available from Amazon. -Bearings are 16mm od x 5mm id and you'll need 4 of them. If you can find flange bearings you don't need to print shaft collars. -Tap Controller_Bracket mounting holes M3 and attach controller with 4: M3 x 10mm SHCS -Thread all remaining holes M4 -Parts attach to base with M4 x 12mm FHMS and nuts. November 12: I've replaced Thick-Gear_01 with Thick_Gear_02. The new one has a larger hub diameter and can be threaded more for a setscrew to better grab its axle. I still recommend filing a flat on the shaft though: it will make a huge difference in the amount of torque the motor can apply to the load. December 1, 2021: -Uploaded Controller_Bracket_Tall_03. This one can hold the slightly larger "RioRand 6V 12V 24V 28V 3A 80W DC Motor Speed Controller PWM Speed Adjustable Reversible Switch 1203BB DC Motor Driver" available thru Amazon. This one has a slightly higher power rating and it's got a pre-wired reversing switch.
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