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October 2010

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From:
Andy Traiger <[log in to unmask]>
Reply To:
Andy Traiger <[log in to unmask]>
Date:
Mon, 18 Oct 2010 01:40:37 -0400
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I agree with Randy and Lloyd.  Gears should be reserved for the lift-arm
motor.  The motors have plenty of speed already for the drive wheels and a
good amount of power too.  If you need more speed, just go with bigger
wheels, you don't need gears.  

If the lift arm motor needs to lift a heavy load, the motor will not be able
to hold the load in position when it is not being driven.  In this case,
putting a small gear on the motor that drives a larger gear that attaches to
the lift arm will allow the motor to hold the heavy load in place.

Also, if the lift arm motor needs to control an attachment that spins on an
axis perpendicular to the motor's axis, using those 4 pronged knob gears
works well.

Andy
Cougar Spirit

-----Original Message-----
From: First Lego League in Virginia and DC
[mailto:[log in to unmask]] On Behalf Of Randy Greene
Sent: Monday, October 18, 2010 1:03 AM
To: [log in to unmask]
Subject: Re: [VADCFLL-L] VADCFLL-L Digest - 16 Oct 2010 to 17 Oct 2010
(#2010-95)

I agree with Lloyd.  Con:  Extra complexity, more for the kids to learn,
more possibility of things to go wrong.  Pros:  Extra torque or extra speed
if needed.  My take:  I would only suggest gears to the students for an arm
motor if needed.

Randy Greene
Fairfield Court Eaglebots #1999



-----Original Message-----

Date:    Sun, 17 Oct 2010 19:12:47 -0400
From:    Lloyd O'Hara <[log in to unmask]>
Subject: Re: GearsVsNoGears

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I can give you my personal perspective.  Only use gears, if you need =
gears.  If you need to gear up or down then it's worth it.  If you don't =
need to gear up or down, they become one more moving part that can go =
wrong and/or cause inconsistency.  I've always liked the idea of =
simplicity, the less things that can go wrong, the better.

Lloyd
  ----- Original Message -----=20
  From: Hemamalini Manapakkam=20
  To: [log in to unmask]
  Sent: Sunday, October 17, 2010 6:50 PM
  Subject: [VADCFLL-L] GearsVsNoGears


  Hi All,

  Can anyone give the pros and cons of using gears in their robo.

  Thanks in advance.

  Technobots

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