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 18:31:53 GMT
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Original-From:
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dave madden <dhm@paradigm.webvision.SAYNOTOSPAMcom>
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Viewed:
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1149 times
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=>From: "John A. Tamplin" <jat@Traveller.COM>
=>...
=>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?
Yes. I used it in a platform a couple of days ago, driving one of the
diff bodies of an adder/subtractor. When I tried to run it on
carpeting, the clutch would slip almost constantly, and it took a
while for the robot to get moving. On a smooth surface, it took less
time to get moving, but the clutch still appeared to be slipping all
the time. (I guess if I gave it a long enough run-up, it'd eventually
stop slipping, but my kitchen isn't that big :-)
Anyway, when I replaced the clutch with a plain 24T gear, the motor
had no trouble driving the platform, but I'd guess the start-up
current was considerably higher.
d.
--
Did you check the web site first?: http://www.crynwr.com/lego-robotics
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Message is in Reply To:
 | | 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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