Subject:
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Re: gearing problem, continued
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 5 Feb 1999 03:21:32 GMT
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Original-From:
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dave madden <dhm@paradigm.AVOIDSPAMwebvision.com>
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Viewed:
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976 times
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=>From: "John A. Tamplin" <jat@Traveller.COM>
=>...
=>Also, what exactly is the clutch gear and is it still available? I am
=>assuming it spins freely in one direction and not in the other.
I recently bought an 8735 Power Pack Motor Set which contained a
white, 24T gear with the markings "2.5 . 5.0 Ncm"; I think this is the
clutch gear you mention. It does not ratchet as you describe,
however. It operates like an ordinary gear until the load exceeds a
certain amount (my physics is weak, but perhaps "X Ncm" somehow
describes a maximum torque) at which time the axle can turn
independently of the gear teeth. That is, when the load is too great,
the clutch slips and the motor doesn't stall, but the drive train
doesn't move.
d.
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message has 1 Reply:
 | | Re: gearing problem, continued
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| (...) Yes Ncm is a unit of torque, Newton-centimeters. However, I have no idea quantitatively how much torque that is since I haven't ever measured the output of the Lego motors. Have you ever had it slip when the drivetrain wasn't stalled? John A. (...) (26 years ago, 5-Feb-99, to lugnet.robotics)
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Message is in Reply To:
| | gearing problem, continued
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| I just realized the old-style differential has a 28t gear on it, which makes it easy to get the desired ratio. Is it still being made, or is the only way to get it from someone that already has it? Also, what exactly is the clutch gear and is it (...) (26 years ago, 5-Feb-99, to lugnet.robotics)
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