Use this thing to test te maximum torque of your motor. It's designed for a motor with a shaft with a min. diameter of 4.5mm and a max. diameter of 5.0mm. This is the right size for a Nema 17 motor.
The radius of the wheel is about 3cm. I made holes in the object to make it easy to connect a piece of string.
If you don't like the size of the hole or the size of the wheel, you can edit it by using the scad file, but i didn't put any vars or comments in it, but that won't be a problem if you understand the open scad language.
- Print the object.
- Attach a piece of string.
- Attach object to your motor.
Attach as much weight to the robe as your motor can handle.
- Calculate Torque:
maximum torque = Mass(kilogram) 9.81(meter/second^2) Radius(meter)
maximum torque = Force(Newton) * Radius(meter)
-Radius : 0.030 meter
-Mass : You are lifting 0.780 kilogram
Your maximum Torque = 0.780 9.81 0.030 = 0.23 NM(which is the same as 23 Ncm)