 | | Straight-driving car
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| I'm building an RCX robot that maps the house with some help from the computer. My problem is this: I need to create a car that will drive perfectly straight and also be able to make precise turns without having to move forward while turning. I have (...) (25 years ago, 2-Sep-99, to lugnet.build)
| | | | | Re: Straight-driving car
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| (...) One idea would be to use treads and an adder-subtracter device: (URL). This is kind of bulky, but it will eliminate the problem with the motors being mismatched. It's pretty difficult to do this actually -- perfectly straight is a tall order. (25 years ago, 3-Sep-99, to lugnet.build)
| | | | | Re: Straight-driving car
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| (...) Yeah, it is, but in order for it to be able to correctly map the house, without making the whole map screwed up, it needs to be able to drive perfectly straight. (25 years ago, 3-Sep-99, to lugnet.build)
| | | | | Re: Straight-driving car
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| If you're interested, I have posted an LDraw file of such a robot that incorporates an adder-subtractor transmission into its chassis: (URL) need two differentials, but it works pretty well. The only complaint I have with it is that it's very slow (...) (25 years ago, 3-Sep-99, to lugnet.build)
| | | | | Re: Straight-driving car
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| I've built a robot with a rotation sensor that keeps track of the position of the steering wheels. If you gear up this movement a bit it gets accurate enough to keep the wheels straight. You need to add a calibration routine to your program to find (...) (25 years ago, 5-Sep-99, to lugnet.build)
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