VEX Forum Strength of a 269 and a 393 motor.
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 General Forum Open Discussion of the VEX Robotics System that can be answered by anyone. VEX Robotics Engineers will not answer questions posted here; see Official VEX Technical Support below.

#1
05-01-2012, 10:19 AM
 techlab1 Junior Member Join Date: Feb 2012 Posts: 6
Strength of a 269 and a 393 motor.

How much weight can a 269 motor push? 393 motor?
#2
05-02-2012, 02:38 PM
 dontworryaboutit Senior Member VEX # 254D Join Date: Mar 2010 Posts: 613 Images: 1
Re: Strength of a 269 and a 393 motor.

Motors aren't defined by how much they can "push," but rather by their torque (with how much force they turn an axle you put into the motor). Torque is measured in inch-pounds. 1 inch-pound is the amount of torque required to lift a 1 pound weight that is 1 inch from the axis of rotation of the motor output. So if you had a motor that supplied a torque of 1 inch-pound, and you put a wheel on it with a radius of 1 inch, the motor would be "pushing" through the wheel with a force of 1 pound.

The maximum torque of a 269 is 8.6 inch-pounds and the maximum torque of a 393 is 13.5 inch-pounds. Note that in order to get this much torque, the motors will not be moving at all, because the torque decreases as the motor speeds up.
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#3
05-03-2012, 07:59 AM
 richard60 Member VEX # 4886A Join Date: Mar 2012 Location: East Corinth,VT Posts: 96
Re: Strength of a 269 and a 393 motor.

What is a"Good" lift gear ratio?

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#4
05-03-2012, 08:07 AM
 General Reggie Senior Member VEX # N/A Join Date: Apr 2011 Location: college Posts: 136 Images: 1
Re: Strength of a 269 and a 393 motor.

Quote:
 Originally Posted by richard60 What is a"Good" lift gear ratio? (Opinions please)
1:5 or 1:7 for torque is a good lift ratio. (at least for gateway it was)
#5
05-03-2012, 08:10 AM
 bgambsky Senior Member VEX # 1200 Join Date: Nov 2011 Location: Neenah, WI Posts: 101
Re: Strength of a 269 and a 393 motor.

Quote:
 Originally Posted by General Reggie 1:5 or 1:7 for torque is a good lift ratio. (at least for gateway it was)
1:1 was a good ratio for a six-bar :P lol if only
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#6
05-03-2012, 08:39 AM
 JVN VEX Robotics Join Date: Oct 2005 Location: Greenville, TX Posts: 1,274 Images: 18
Re: Strength of a 269 and a 393 motor.

Quote:
 Originally Posted by techlab1 How much weight can a 269 motor push? 393 motor?
How fast do you want the weight moved?
Even the smallest motor can lift a bowling ball, it just needs to be geared very slowly.
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#7
05-03-2012, 11:03 AM
 banditofernando Senior Member VEX # UVM Join Date: Nov 2011 Location: Philadelphia, PA Posts: 704
Re: Strength of a 269 and a 393 motor.

Quote:
 Originally Posted by bgambsky 1:1 was a good ratio for a six-bar :P lol if only
HEY! Our B team did that our first meet when we didn't know anything about gearing... But it was a 1:1 4 bar with no rubber bands
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#8
05-03-2012, 11:07 AM
 bgambsky Senior Member VEX # 1200 Join Date: Nov 2011 Location: Neenah, WI Posts: 101
Re: Strength of a 269 and a 393 motor.

Quote:
 Originally Posted by banditofernando HEY! Our B team did that our first meet when we didn't know anything about gearing... But it was a 1:1 4 bar with no rubber bands
I'm not making fun of it I'm sorry. I really wish that it was possible to do it.
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#9
05-04-2012, 12:05 AM
 murdomeek Senior Member VEX # 1107B Join Date: Jan 2009 Posts: 2,127 Images: 8
Re: Strength of a 269 and a 393 motor.

Quote:
 Originally Posted by banditofernando HEY! Our B team did that our first meet when we didn't know anything about gearing... But it was a 1:1 4 bar with no rubber bands
haha same here!
w had a 1:1 single piviot arm back in elevation...
back in the day...
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