Subject:
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Re: 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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Sat, 28 Oct 2000 13:20:02 GMT
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Viewed:
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1771 times
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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 instructions for Minerva 1.5 are
online. I used sliding worm gears rather than ratchets. Here's my
original message:
http://news.lugnet.com/robotics/?n=12938
I hope this helps.
Regards,
Jonathan
Jason wrote:
>
> 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 is in Reply To:
 | | Using one motor to do 2 things...
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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 (...) (26 years ago, 27-Oct-00, to lugnet.robotics)
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