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  #151   Spotlight this post!  
Unread 28-01-2011, 18:23
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Re: Minibot climb rate

Hmm....

I imagine for a 1:1 (pre mod) reduction it's more efficient to leave the gearbox as is than to take out half the stages and compensate for the speed increase with Tetrix gears.

But for a 0.5:1 (pre mod) - that could be interesting.
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  #152   Spotlight this post!  
Unread 28-01-2011, 23:01
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Re: Minibot climb rate

Quote:
Originally Posted by nckureghian14 View Post
7 seconds is not too fast considering 1625 can climb in 3 seconds
Wow.

We are 4.5 with a 1 second deployer. We havent tested our other two mini bots yet. 2:1 gear ratio, magnet holding method.

Last edited by Grim Tuesday : 29-01-2011 at 00:35.
  #153   Spotlight this post!  
Unread 29-01-2011, 00:31
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Re: Minibot climb rate

not to show off or anything... but this is our minibot... water bottles attached to simulate battery weight.. 3.4 seconds!

http://www.youtube.com/watch?v=UqPyHQqQtYk
  #154   Spotlight this post!  
Unread 29-01-2011, 00:33
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Re: Minibot climb rate

http://www.youtube.com/watch?v=UqPyHQqQtYk

water bottles attached to simulate battery weight
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Unread 29-01-2011, 00:52
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Re: Minibot climb rate

nice job.
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  #156   Spotlight this post!  
Unread 29-01-2011, 09:18
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Re: Minibot climb rate

Looks like a nice start!
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  #157   Spotlight this post!  
Unread 29-01-2011, 21:12
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Re: Minibot climb rate

Does anyone know the weight of the individual tetrix parts like the large gear=xlbs, motors=ylbs sort of thing?
  #158   Spotlight this post!  
Unread 29-01-2011, 23:29
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Re: Minibot climb rate

According to our scale in the shop battery is 1 lb 5.1 oz and motor is 7.0 oz.
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Unread 30-01-2011, 11:38
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Re: Minibot climb rate

Quote:
Originally Posted by kialogical310 View Post
Does anyone know the weight of the individual tetrix parts like the large gear=xlbs, motors=ylbs sort of thing?
Answer to this question is in this thread. It would be helpful to read the whole thread.
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Unread 30-01-2011, 17:40
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Re: Minibot climb rate

our minibot climb the pole in approximately 2.5 sec , a little less.
with all the wight on it , the battery is attached to the minibot.
you welcome to see it in the post:
http://www.chiefdelphi.com/forums/sh...threadid=90373
hope for comments on it .
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Unread 31-01-2011, 09:19
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Re: Minibot climb rate

Quote:
Originally Posted by Gary Dillard View Post
...It looks like this gearbox is pretty clean - don't know if it was that way when you opened it...
The photo was taken seconds after opening the box for the first time. It was quite clean and lubrication was pretty light.
  #162   Spotlight this post!  
Unread 31-01-2011, 09:44
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Re: Minibot climb rate

Considering the use of tiny helical gears I think adding more lubrication will help even unmodified gearmotors.
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  #163   Spotlight this post!  
Unread 31-01-2011, 09:52
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Re: Minibot climb rate

Quote:
Originally Posted by Tobot View Post
The photo was taken seconds after opening the box for the first time. It was quite clean and lubrication was pretty light.
Quote:
Originally Posted by Chris is me View Post
Considering the use of tiny helical gears I think adding more lubrication will help even unmodified gearmotors.
I looked at one of the transmissions we had, and I didn't notice any lubrication. It may have been there, but I couldn't see it or really feel it.

Does anyone have a good grease for these guys? I'd imagine you'd want a pretty light grease.
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  #164   Spotlight this post!  
Unread 31-01-2011, 13:08
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Re: Minibot climb rate

Has anyone tried the Thermal-Protected DC Motor Power Cable yet? If my memory is correct it's set for 2.4 amps, which is lower then some of the motor current draw that I've seen people post. I assume it will work for a short time at a current draw of above 2.4 amps, so I'm curious whether it works for other people.
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Unread 03-02-2011, 13:37
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Re: Minibot climb rate

Quote:
Originally Posted by Joe Ross View Post
Has anyone tried the Thermal-Protected DC Motor Power Cable yet? If my memory is correct it's set for 2.4 amps, which is lower then some of the motor current draw that I've seen people post. I assume it will work for a short time at a current draw of above 2.4 amps, so I'm curious whether it works for other people.
We used the tetrix motor cables last night. They worked great, and did not trip to the best of my knowledge. Judging by time, it was pretty close to the peak power point.
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