Go Back   VEX Forum > Community > General Forum

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.

Reply
 
Thread Tools
  #1  
Old 05-01-2012, 10:19 AM
techlab1 techlab1 is offline
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?
Reply With Quote
  #2  
Old 05-02-2012, 02:38 PM
dontworryaboutit's Avatar
dontworryaboutit dontworryaboutit is offline
Senior Member
VEX # 254D
 
Join Date: Mar 2010
Posts: 641
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.
__________________
254D = 254Doesn't work at competition
254D = redefining "18 inches" since 2009
First make it work, then make it work well.
Reply With Quote
  #3  
Old 05-03-2012, 07:59 AM
richard60's Avatar
richard60 richard60 is offline
Member
VEX # 4886A
 
Join Date: Mar 2012
Location: East Corinth,VT
Posts: 96
Send a message via Yahoo to richard60
Smile Re: Strength of a 269 and a 393 motor.

What is a"Good" lift gear ratio?

(Opinions please)
__________________
Sack attack season:
4886A
Assisted Team 6485D and mentored 6485a (sack attack)

Gateway Season:
Assisted Team 4886D (The Cake)
With building most of their robot.

Cheers and Good luck,

Richard P
Reply With Quote
  #4  
Old 05-03-2012, 08:07 AM
General Reggie General Reggie is offline
Senior Member
VEX # N/A
 
Join Date: Apr 2011
Location: college
Posts: 153
Images: 1
Send a message via Skype™ to General Reggie
Re: Strength of a 269 and a 393 motor.

Quote:
Originally Posted by richard60 View Post
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)
Reply With Quote
  #5  
Old 05-03-2012, 08:10 AM
bgambsky's Avatar
bgambsky bgambsky is offline
Senior Member
VEX # 1200
 
Join Date: Nov 2011
Location: Neenah, WI
Posts: 101
Send a message via Skype™ to bgambsky
Re: Strength of a 269 and a 393 motor.

Quote:
Originally Posted by General Reggie View Post
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
__________________
1200 Syntax Error
"I reject your reality and substitute my own!"~Adam Savage
"If it doesn't work, you didn't build it right"
1200C 2011-2012

2011-2012 World Championship Divisional Excellence Award
Reply With Quote
  #6  
Old 05-03-2012, 08:39 AM
JVN's Avatar
JVN JVN is offline
VEX Robotics
 
Join Date: Oct 2005
Location: Greenville, TX
Posts: 1,286
Images: 18
Re: Strength of a 269 and a 393 motor.

Quote:
Originally Posted by techlab1 View Post
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.
__________________
John Vielkind-Neun | VP of Product Development | VEX Robotics, Inc.
Reply With Quote
  #7  
Old 05-03-2012, 11:03 AM
banditofernando's Avatar
banditofernando banditofernando is offline
Senior Member
VEX # BNS
 
Join Date: Nov 2011
Location: Philadelphia, PA
Posts: 723
Re: Strength of a 269 and a 393 motor.

Quote:
Originally Posted by bgambsky View Post
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
__________________

robert@botsnstuff.com
Reply With Quote
  #8  
Old 05-03-2012, 11:07 AM
bgambsky's Avatar
bgambsky bgambsky is offline
Senior Member
VEX # 1200
 
Join Date: Nov 2011
Location: Neenah, WI
Posts: 101
Send a message via Skype™ to bgambsky
Re: Strength of a 269 and a 393 motor.

Quote:
Originally Posted by banditofernando View Post
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.
__________________
1200 Syntax Error
"I reject your reality and substitute my own!"~Adam Savage
"If it doesn't work, you didn't build it right"
1200C 2011-2012

2011-2012 World Championship Divisional Excellence Award
Reply With Quote
  #9  
Old 05-04-2012, 12:05 AM
murdomeek's Avatar
murdomeek murdomeek is offline
Senior Member
VEX # 1107B
 
Join Date: Jan 2009
Posts: 2,135
Images: 8
Re: Strength of a 269 and a 393 motor.

Quote:
Originally Posted by banditofernando View Post
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...
we had to "balance" it by adding dead weights to the other end! XD
back in the day...
__________________

2012 BC championships Create Award 4th seed
2012 Vancouver Island Tournament Driver Skills Champion and Design Award
British Columbia Season Opener 2011 Excellence Award and Programming Skills
Washington Jump start 2011 Tournament Champions and Drivers Skills
VEX Robotics World Championship - Inspire Award and Quarter-Finalist (7th Seed Alliance captain, with teams 10D and 40B)
British Columbia Vex championships - Judges award
Washington VRC Winter Tournament - First Seed and Excellence Award
Vancouver Island VRC tournament - First Seed, Excellence award, Drivers Skill Champions, and Tournament Champions
2010 British Columbia Season Opener - Tournament Champions
2010 Washington jump start - Tournament Champions and Amaze Award









.[/size]
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 12:18 AM.


VEX and VEX Robotics are trademarks or service marks of Innovation First International, Inc.
Copyright © 2002-2013. All Rights Reserved. VEX Robotics, Inc. is a subsidiary of Innovation First International, Inc.
All other product names/marks of others are the property of their respective owners.