We built our robot and realized we have 7 motors instead of 6 duh. We are thinking of only using one motor for our arm but are concerned that it may not have enough torque. Any suggestions on a gear ratio build that would give the arm enough torque to lift 2 risers?
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Hi @Nickyg529!
Can you give us a bit more info regarding your robot? Including perhaps pictures? Thanks!
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I bet for ur arm u can use a 64 teeth gear ten a 12 tooth gear’
- That’s pretty extreme ratio
A. It’s going to create a lot of speed if the 64 tooth is the driven gear
B. Or it’s going to be very slow if the 12 tooth is driven. - They apparently have it working with two motors, but that’s all we know.
A. Is it a simple shoulder lift? The a 12:48 should be more than enough.
B. If it’s a long arm, more torque is needed, what’s the size of the arm.
C. 4 bar linkage? What’s the other dimensions?
@Sharky_do, lots of unknowns that would be good to know beforehand. Just flinging ratio numbers out there isn’t helpful. And remember they can do stacked gears to fine tune their arm.
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If it’s really needed, 12:64 isn’t a terribly slow ratio, stacking another one is a little rough but overall the one connection is no problem. But I agree that a 12:48 should work pretty good in the end depending on how heavy the arms are.
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I’m sorry, I just gotta say it.
It’s 60 tooth, not 64 tooth.
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Obviously, there is more to this question then I thought. I will gather more information and repost the question. Thnak you all for your help.
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Unless your team is already using rubber bands to assist, have a look at the Rise, Clutch and Stretch for your team to get some ideas on how to store energy and reuse to help lift.
https://www.vexrobotics.com/vexcode-download
Cheers,
Pete
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