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Unread 04-02-2017, 11:23
serdaruluer serdaruluer is offline
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2.5" CIM Motor stops when climbing

Is the CIM motor enough to lift robot? After rope winds our motor stops and robot can not go up.
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Unread 04-02-2017, 11:28
Christopher149 Christopher149 is offline
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Re: 2.5" CIM Motor stops when climbing

What gear reduction (if any) do you have connected to the CIM? What drum/winch diameter?
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Unread 04-02-2017, 11:33
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Re: 2.5" CIM Motor stops when climbing

Any.
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Unread 04-02-2017, 11:34
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Re: 2.5" CIM Motor stops when climbing

Can you post a picture of your robot? It would help us figure out a solution.

A CIM motor is plenty powerful enough to make the robot climb.
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Unread 04-02-2017, 11:42
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Re: 2.5" CIM Motor stops when climbing

How to send photo easily? Only link?
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Unread 04-02-2017, 11:44
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Re: 2.5" CIM Motor stops when climbing

Quote:
Originally Posted by serdaruluer View Post
Any.
The problem may be inadequate gear reduction.

But you need to provide more detail if you want more definitive help.

Describe the complete drivetrain from the CIM to the winch, including gear reductions, winch diameter, and rope diameter.

And post a couple of well-focused pictures.

You can attach them to your CD post, or you can upload them to imgur.com and provide links.



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Unread 04-02-2017, 11:50
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Re: 2.5" CIM Motor stops when climbing

https://drive.google.com/file/d/0B0L...ew?usp=sharing
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Unread 04-02-2017, 11:53
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Re: 2.5" CIM Motor stops when climbing

https://drive.google.com/file/d/0B0L...ew?usp=sharing
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Unread 04-02-2017, 12:04
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Re: 2.5" CIM Motor stops when climbing

Quote:
Originally Posted by serdaruluer View Post
It looks like you have no gear reduction.

What is the diameter of the winch?

What is the diameter of your rope?


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Unread 04-02-2017, 12:06
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Re: 2.5" CIM Motor stops when climbing

That works, thanks!

It looks like you need a larger gear reduction than what you have right now. If you can put a gearbox between the CIM and the climbing shaft, then the climbing shaft will have more torque. This would probably work: http://www.andymark.com/ToughBox-p/am-toughbox.htm

I am not sure how long shipping takes to your part of the world. Do you have any other gearboxes, or know teams in your area that might have old gearboxes?
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Unread 04-02-2017, 13:10
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Re: 2.5" CIM Motor stops when climbing

You will need a gear reduction of some sort. Our robot for 2016 used about a 35:1 gear reduction or so for our winch. We also used only one CIM and it worked perfectly fine for us. We usually were able to climb in about 4 to 5 seconds after the hook was put on the bar.
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Unread 04-02-2017, 13:16
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Re: 2.5" CIM Motor stops when climbing

A 12.75 GR AM Toughbox with a 150# robot, 2"dia winch, and a CIM motor will operate at over 60A of current. It is likely that a 40A breaker will trip during a 5 second climb. Try a GR ratio of ~25:1
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Unread 04-02-2017, 13:19
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Re: 2.5" CIM Motor stops when climbing

Quote:
Originally Posted by logank013 View Post
You will need a gear reduction of some sort. Our robot for 2016 used about a 35:1 gear reduction or so for our winch.
The appropriate gear reduction depends on the winch diameter and -- in some designs -- on the rope diameter.

That's why I've asked the OP to tell us their winch diameter and rope diameter.


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Unread 04-02-2017, 15:31
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Re: 2.5" CIM Motor stops when climbing

Winch diameter is 3cm and rope diameter is 1,5cm.
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Unread 04-02-2017, 15:36
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Re: 2.5" CIM Motor stops when climbing

Can we find another solution but using gearbox? On the motor side small gear, on the shaft side big gear possible?
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