Robotic Arm with 7DOF

[Homosapien]

Gah! I just noticed this section would be appropriate for me to post my thread. I really hope someone can help me with this!


I am currently studying Robotics and I’ve been lurking around reading up on Robotics. I am working on an industrial Robotic Arm using 7DOF and I have been out of my wits trying to get some help on this. Locally, it’s been hard for me to get some help and somehow, I thought I would check out if there were any websites/forums that might be able to help me out so here I am wondering if anyone of you would be kind enough to provide with me some designs in terms of mechanical components?

The motion that I am using is almost the same as a human arm and can hold up 3 kg of things. I want to use electrical actuators and gears, preferably at a low cost and light weight.

As I stated above, I need help on the mechanical design (mechanism) movement of the arm. I would really appreciate it if anyone can help me on this. I seriously have tried getting help elsewhere and Robotics isn’t something that is big here – not yet, anyway! So here I am – trying on a forum!

Many thanks in advance!

 

[Mr RB]

This is a really difficult project!

7 (powered) degrees of freedom, light weight, low cost, 3kg payload and it has to be "industrial" too?

3kg at the end of an arm might be 100's of kgs of leverage at the shoulder pivot. That would be a hard one to make "lightweight" even for someone with lots of experience, a machine shop AND a large budget.

Maybe you could explain exactly what it has to lift, how far, and how fast, and how much you really want to spend. That might be a good starting point and will decide the basic construction and types of gearmotors etc.

 

[Homosapien]

This is a really difficult project!

7 (powered) degrees of freedom, light weight, low cost, 3kg payload and it has to be "industrial" too?

3kg at the end of an arm might be 100's of kgs of leverage at the shoulder pivot. That would be a hard one to make "lightweight" even for someone with lots of experience, a machine shop AND a large budget.

Maybe you could explain exactly what it has to lift, how far, and how fast, and how much you really want to spend. That might be a good starting point and will decide the basic construction and types of gearmotors etc.

Argh! It is hard.

Is there any websites where I can get a mechanical design? A basic one.

I've done research and I've been reading up a lot but it seems pretty hard to get a basic mechanical design. Perhaps, I am going about the wrong way?

 

[Mr RB]

Google for "industrial robot arm" to get pictures of how it done well, you will see the motors and arm are much bigger at the base and get smaller and lighter going out towards the hand. And they cost anywhere from 50 grand up to about a million depending on size and speed.

Google for "I made a robot arm" or "RC servo robot arm" to see how it is done on a hobby level, to see it done really badly...

Again if you are serious about making one please post what it needs to lift, how far, how fast, how precise etc etc etc and people may be able to offer better suggestions than the simple ones I have given.

 

[blueroomelectronics]

7 DOF and low cost & light weight. Wishful thinking.