Backdrivable reduction mechanism
Backdrivable reduction mechanism
(OP)
Dear All,
I am looking for a lightweight backdrivable reduction mechanism with 1:100 reduction ratio. Is there any option to for lightweight and backdrivable reduction mechanism?
regards,
I am looking for a lightweight backdrivable reduction mechanism with 1:100 reduction ratio. Is there any option to for lightweight and backdrivable reduction mechanism?
regards,





RE: Backdrivable reduction mechanism
desertfox
RE: Backdrivable reduction mechanism
RE: Backdrivable reduction mechanism
RE: Backdrivable reduction mechanism
RE: Backdrivable reduction mechanism
RE: Backdrivable reduction mechanism
Mike Halloran
Pembroke Pines, FL, USA
RE: Backdrivable reduction mechanism
RE: Backdrivable reduction mechanism
Harmonic drive is backdrivable. I have designed a system with harmonic drive, and there is no problem turning it by hand. In some applications, it is even used as a speed increaser.
RE: Backdrivable reduction mechanism
Is Harmonic drive is backdrivable? What about the resistance torque from output to input? Is the resistant torque small?
I will use it as speed reducer in a part of cycle and as backdrive in other part of the cycle. Where can I buy it with low price? I checked the price in http://www.harmonicdrive.net/ , but the prices were very expensive.
RE: Backdrivable reduction mechanism
what do you mwan with "I have a prototype of such a drive sitting on my shelf"? I don't get what do u mean?
RE: Backdrivable reduction mechanism
When you drive anything through a gearbox, the inertia of the load is multiplied by the square of the gear ratio. In your case, it is multiplied by 10,000. You will notice this.
My understanding is that harmonic drive has a fixed friction torque. It is about 90% efficient at maximum torque. It is less efficient at lower torques.
Harmonic drive is not cheap. Rather than buy a packaged gear reducer, you might want to buy just the gearset, so that you can integrate it with your system. You can wind up with a really cool design.
If you want dirt cheap, buy some worm gears, and forget about backdriving and efficiency.
RE: Backdrivable reduction mechanism
RE: Backdrivable reduction mechanism
RE: Backdrivable reduction mechanism
What do you mean?
The output speed is an exact multiple of input speed, just the same as a gear drive. There is no backlash in a standard harmonic drive gear set, but there is a little bit of elastic wind-up.
The catalogues are very good. Read them.
RE: Backdrivable reduction mechanism
RE: Backdrivable reduction mechanism
Google.