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Author Topic: [question] Actuators selection for a robotic arm  (Read 1168 times)
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Pomacs
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« on: June 03, 2013, 02:52:26 14:52 »

Hello guys,

I have an issue with selection of actuators in a 3-DOF robotic arm.
The work i did is calculating the dynamic torque by myself with no software and i need a tool to verify the work i did.

If someone can recommend me a tool or something to read so i can verify my work is right it will be appreciated.
Also i'd like to add that making sure of right selection affects the project economics and the rest of the mechanical design and CAD drawings.

And anyone who like more information or think i can help any way can PM me or post here.

Thanks  Smiley
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bbarney
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« Reply #1 on: June 03, 2013, 05:45:52 17:45 »

try here
http://www.robotshop.com/blog/en/robot-arm-torque-calculator-9712
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Ichan
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« Reply #2 on: June 03, 2013, 08:16:37 20:16 »

I have an issue with selection of actuators in a 3-DOF robotic arm.

Is that about selecting actuator type or size?


That can be very useful, thanks.

I just got a task to resurecting 4 dead unit of MA2000 educational robot arm.



I wonder if anyone here experienced with that 30-ish year old electromechanics.

-ichan
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LoneWolf
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« Reply #3 on: June 12, 2013, 12:17:26 00:17 »

well, i'd say depends on budget and approach, if you want to go 100% electronic, go with servos, if you want to go more fancy, use air pistons, such like this: http://www.clippard.com/products/cylinder-stainless-miniature
you could use air- valve solenoids to control air flow,and arduino to control the valves, or servos if you want to go with that, i'd say for the sake of budget and simplicity, go with servos, does your arm have to meet requirements? such as force it can make? or weight it can lift?
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solutions
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« Reply #4 on: June 12, 2013, 07:56:42 07:56 »

Ichan - with the right kind of end effector, that arm has possibilities....
 Tongue

Seriously, it is a cutie - I'd love to pick one up to play with, or maybe even build a copy some day for something stupid like playing chess.

Is there a syncro belt inside to run the next axis up from the motor, a chain, or ?? Or is it just structural in terms of the width of the sheet metal (hollow) structure?
« Last Edit: June 13, 2013, 08:06:25 08:06 by solutions » Logged
Ichan
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« Reply #5 on: June 13, 2013, 07:28:11 07:28 »

Haha.. i can't imagine what kind of end effector that you were thinking about..  Shocked

Yes this one is very interesting, good made product, not a complicated one - a great toy to learn robotic arm.

I decided to create a new thread about bringing these things back from the death, what proper word of it? Resurrection, revival, awakening?

-ichan
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solutions
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« Reply #6 on: June 13, 2013, 07:59:13 07:59 »

http://www.youtube.com/watch?v=Z-6OXAb1YgU

So, does it use belts, chain, or ? It doesn't look like it has counterweights and the motors appear too small to have enough torque for direct drive
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« Reply #7 on: June 13, 2013, 08:04:41 08:04 »

Whuahaha.. good they do not use this robot, the end effector is pneumatic grip - imagine how i clamp, ouch...  Grin

I will answer your questions in a new thread.

-ichan
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