LEGO TECHNIC : 8922


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Subject:	Motorized control of the 5120 polarity switch
Newsgroups:	lugnet.technic, lugnet.robotics
Date:	Sat, 18 Jan 2003 16:39:29 GMT
Viewed:	1026 times

Hi all, I'm trying to control a polarity switch with a motor controlled by an RCX. The position of the switch is monitored by a rotational sensor. The problem I am having is how far the switch moves on return to the middle 'off' position, it tends to move way too far. I've tried slowing down how fast the switch moves by various gear/pully combinitions with little success. Has any done any work on this? Are there any istruction posted on motor control of the polarity switch? Thanks for your help, Roy

Message has 2 Replies:

		Re: Motorized control of the 5120 polarity switch
(...) I belive there should be a fair amount of info on this if you search the robotics group. It has been used to multiplex the out ports of the RCX so that one motor can drive up to four (IIRC) swicthes. Best regards, /Tobbe (URL) SPAM when (...) (22 years ago, 20-Jan-03, to lugnet.technic, lugnet.robotics)

		Re: Motorized control of the 5120 polarity switch
(...) Take a look at (URL). I controlled it with something similar to Robert Munafo's design (URL). Cheers, Hao-yang Wang (22 years ago, 22-Jan-03, to lugnet.technic, lugnet.robotics)

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