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JP posted an update 6 years, 10 months ago
I am making the robot for the entrance of the company where i work.
Maybe you’ve heard about a derivative on the bicep to use a stepper motor.
Well it’s not mine but i do believe in the idea to use a stepper motor.
With this i think we can improve the strength of the arm.
For some time I have played with these stepper motors. (Machine making)
The thing is you can get a Nema 17 steppermotor for around 12 euros.
And you’ll need a stepper driver which is around 11 euros on ebay.
So the price is still the same at least for me.
An advantage of a stepper is that when the weight on the arm gets too much it just misses some steps.
And with a servo you might break a gear or even burn the motor.
the stepper will draw a lot of current which will overheat the stepper driver but that happens after some time.
and it’s an easy fix to cool the driver with a fan.
with a servo you know the position of the servo horn but a stepper does not, especially when you lose a step or two.
for that i want to use a potmeter just like a servo does.
ok it sounds complicated but i will show this in time if it works OR NOT.
for now I am working on the derivatif to use this stepper motor efficiently and strong.
Let me hear what you think.
Hi jP, here is a link to a derivative using a stepper motor, I haven’t heard of that person since a while so I have no idea if it is any good. But it might help to start with. http://www.thingiverse.com/thing:50054
yes thanks man, thats the derivative i was talking about. the derivative didn’t work because the stepper motor is wider than the 2 LowerarmsideV1 parts. so you could just move the arm a few centimeters.
I guess you would need to redesign LowerarmsideV1.