Subject:
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Using one motor to do 2 things...
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 27 Oct 2000 18:21:43 GMT
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Viewed:
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524 times
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Hello Mindstorms fans,
I am suffering through a bit of an engineering block. Let me explain:
I had an idea to build a drivetrain that will provide both front/back movement
and left/right(turning) movement off one motor. My question is: is this
possible? It's hard to draw this in ASCII so let me try to explain.
* If you use a motor for front/back, you can configure an axle to also provide
left/right movement through an (I'm not sure of the technical name here)
inverse of the gear (one of the gears that has teeth only on one side). But if
you do this, it means that anytime your chassis is going say, forward, it is
also going, say, left. In the other direction, the chassis will go backwards
and right. This will cause the chassis to do continual 3-point turnarounds.
*The way to overcome this is to disengage the gear that makes the axle (and
thus wheels through rods) from the main drivetrain (the part that makes the
chassis go forward/reverse). However, I cannot think of a way to do this
without another motor.
The short question of this is: Is there any way to use one motor to do both
forward/reverse and turning capability? Since the RCX has only 3 output ports
and I need 2 other outputs for something else, that means buying another RCX.
$$$$:(
Looking forward to any ideas from the experienced LEGO engineers out there.
Jason, building a protoype battle robot.
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Message has 3 Replies:
 | | Re: Using one motor to do 2 things...
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| Hi Jason It's a Friday night and my mind has disengaged so I've not totally thought these through, but you could try a combination of ratchets and directional gearboxes (as seen in the Unofficial guide to Lego Mindstorms by J Knudsen). Basically you (...) (24 years ago, 27-Oct-00, to lugnet.robotics)
| | | Re: Using one motor to do 2 things...
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| (...) I build these and it solves all my problems for all motors and sensors... (URL) the link to build and see what it's about... (...) Dean -- Coin-Op's For Sale!: (URL) Lego Workshop: (URL) Lego Club: (URL) (24 years ago, 27-Oct-00, to lugnet.robotics)
| | | Re: Using one motor to do 2 things...
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| I just posted a message on Thursday about this. I solved this problem in Minerva, in my book _The Unofficial Guide to Lego Mindstorms Robots_. Then I solved it again, in a different way, for the RIS 1.5-compliant version of Minerva. The building (...) (24 years ago, 28-Oct-00, to lugnet.robotics)
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