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Hello, I recently ordered an extra motor from Lego World Shop and a rotation sensor for my RCX. I also bought today The RoboSports Expansion set. My problem is what am I to do with 4 motors? the RCX only has 3 inputs! I would greatly appreciate it (...) (25 years ago, 9-Jul-99, to lugnet.robotics)
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| | Re: Have 4 Motors, Need Help!
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(...) sensor (...) is (...) what (...) -One output from the RCX can run two motors. This property can be useful when you are moving something _heavy_, or when you need two motors in two places doing the same thing. Keep the extra motor. When you (...) (25 years ago, 9-Jul-99, to lugnet.robotics)
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| | Re: Have 4 Motors, Need Help!
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Jonathan, how do u run 2motors on 1 input? That would be very usesful. <ichael Aaron (...) (25 years ago, 9-Jul-99, to lugnet.robotics)
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| | Re: Have 4 motors, need help!
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Build a compressor with your extra motor. If you don't have the pneumatics for it, you soon will, right? :) John Matthews Chris <superpcer1@home.com> wrote in message news:FELuwC.7zw@lugnet.com... (...) sensor (...) is (...) what (...) (25 years ago, 9-Jul-99, to lugnet.robotics)
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| | Re: Have 4 Motors, Need Help!
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Output, not input! Two motors on one output. The way you run two motors on one output is you stack the 9V connector leads on top of each other. They have conducting studs on the top to allow another 9V connecting lead to be connected to the end of (...) (25 years ago, 9-Jul-99, to lugnet.robotics)
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| | Re: Have 4 Motors, Need Help!
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Robert Munafo wrote: [snip] (...) And if you orient the connectors one way, then the motors will rotate in the same direction .... change the connector orientation 90° (in the right direction) and reverse the rotation of the second motor! - - - Nick (...) (25 years ago, 9-Jul-99, to lugnet.robotics)
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| | Re: Have 4 motors, need help!
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Ok ok, I'm not a total newbie to Legos or Mindstorms! I do know that it's possible to connect 2 motors to one output on each side (A and C). The only thing with doing that though is that each 2 motors on either side will move the same! What can you (...) (25 years ago, 9-Jul-99, to lugnet.robotics)
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| | Re: Have 4 motors, need help!
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This Gantry Mill has four motors. Two are driving the gantry. (URL) <superpcer1@home.com> wrote in message news:FEMnKv.A6M@lugnet.com... (...) only (...) move (...) (25 years ago, 10-Jul-99, to lugnet.robotics)
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| | Re: Have 4 Motors, Need Help!
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Robert, Thank u for the tip. BTW i'm a bit mentally challenged when it comes to lego's & robotics so please excuse the confusion about output/input! : ) 90% of the stuff on this list is jibberish to me, but i stay on so that i can learn, & collect (...) (25 years ago, 10-Jul-99, to lugnet.robotics)
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| | Am I missing something? (was: Re: Have 4 motors, need help!)
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From: Bob Fay <rfay@we.mediaone.net> (...) leaves three outputs for the other three motors. Not really a special solution. Isn't the problem really "how do I make the three outputs drive more than three motors (or whatever), each in an independent (...) (25 years ago, 10-Jul-99, to lugnet.robotics)
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| | Re: Have 4 motors, need help!
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(...) Power, power, and more power!! or Speed, speed, and more speed!! Just 2-3 days ago I saw on a web site a small pic of two motors driving the same gear, to provide double power/speed. I wish I could find this page again because I would like to (...) (25 years ago, 10-Jul-99, to lugnet.robotics)
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| | Re: Have 4 motors, need help!
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This is an excerpt from an "almost" real-life experience: Lalala, look mom! My robot has four motors! Two on each side to power the tank treads. Is this cool or what!? *All of a sudden, the robot makes a strange noise, emmits some smoke, and stops* (...) (25 years ago, 10-Jul-99, to lugnet.robotics)
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| | Re: motors
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Hi, I found that one of my Mindstorms motors is a bit stronger than the other. The robot should go forward, but slightly diverts right. When I exchange the motors and nothing else, it diverts to the left. Does anybody else have similar experiece? (...) (25 years ago, 10-Jul-99, to lugnet.robotics)
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| | Re: Have 4 motors, need help!
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Hallo Alan, Perhaps you saw it at (URL) There is a picture with two motors driving one output. Ralf (...) (25 years ago, 11-Jul-99, to lugnet.robotics)
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| | Re: motors
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(...) Unfortunately, almost all of the motors are slightly uneven. Look up "adder/subtracter" or go back through the list to find mechanical solutions which allow your robot to go in a straight line regardless. The archives are at (...) (25 years ago, 12-Jul-99, to lugnet.robotics)
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| | Re: Am I missing something? (was: Re: Have 4 motors, need help!)
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(...) Is there such a hardware/construction FAQ anywhere? I know there was an attempt at such a thing quite some time ago by the lugnet folks, but I have no idea if that ever got off the ground or not. I don't really have time to work on one right (...) (25 years ago, 12-Jul-99, to lugnet.robotics)
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| | Re: motors
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(...) Out of the 6 motors that I own none of them rotate at the same speed. (URL) has some mechanical solutions (using an adder/subtractor) for solving this problem. Note that for many types of robots (line followers, etc) it really isn't a problem, (...) (25 years ago, 12-Jul-99, to lugnet.robotics)
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| | Re: Have 4 motors, need help!
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(...) Yes, that is where I saw it. It was when I visited that site to download the NQC Command Center, which I have found very useful. (...) again (...) of (...) (25 years ago, 12-Jul-99, to lugnet.robotics)
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| | Re: motors
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(...) That's just how mechanical parts are - all parts are slightly different. I've used a differential between the two motors, and then measured the position difference with a rotation sensor. In NQC I just make one of the two motors "float" when (...) (25 years ago, 18-Jul-99, to lugnet.robotics)
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