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Your setup is prone to binding because of the physical arrangement. You have the leadscrew on one side and the bearing on the other, so the leadscrew is unevenly supported. I would put the leadscrew in the middle, with rails on either side. Then, instead of a bearing, I would use bushings, which you could just epoxy in place. How prone to jamming this is ...


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From the sound of it you require smooth continuous operation in this application. To guarantee this you can use a bearing (cheap $3-5 USD ebay bearings would be fine unless you have non-trivial load needs). In your case the load is radial. Depending which bearing you use, you can get around 20 degrees of misalignment (depending on fit and material) before ...


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They seem to be called 'flippers' in most of the literature. This review of the iRobot 310 SUGV on Army Technology notes that: The 310 SUGV has an overall length of 76.1cm and width (flippers on) of 43.7cm. The length with flippers stowed is 70.8cm. Similarly, this 2010 research paper titled Automatic fine motor control behaviours for autonomous mobile ...


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This particular part is called a ring gear, but you're probably not going to find one because the item in your picture is almost certainly custom-made. The particular article I linked is for engine starter motors, so it has external teeth, but there are internally-toothed ring gears, too. What you're describing, beyond the picture, does sound like a kind of ...


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A hydraulic system requires a hydraulic power unit (hpu), and then you still need a motor everywhere you want an electric motor, and then you've got hydraulic hoses (carrying full hydraulic pressure) running through your robot. The hydraulic system will not be easier to maintain, will not be easier to install, and I'm pretty sure it'll be dramatically more ...


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This image appears to be coming from here. This "johnny robot gm track kit" is now sold as "Standard GM Track Kit": Or at least it looks very similar.


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Instead of a threaded rod and a non-threaded rod, use two threaded rods (i.e. replace the red rod in your diagram with a threaded rod) and drive them both from the same motor. You're basically building a twin screw vise. You can also do this with gears:


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Another, similar, configuration is a linear actuator along the center axis of the plate with two guide rails one on both side of the plate. As said by @Chuck this would help with alignment. There are many DC actuators, such as Actuonix Motion Devices (formerly Firgelli Technologies) here. Instead of DC motor, you can use stepper linear actuators such ...


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Let's assume that you know the position of P=(xp,yp) in the initial state. Let's also assume that you know the transformation matrix t which transforms the initial state of the robot to the next state. Due to the relative nature of positions, you can say that robot is standing still and that the point P is moving. This is exactly what you need as you wish to ...


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I think you might need two "lazy susans" in the channel. Shown in green in this image. And then the rider in the channel does not have to be round. In fact it is probably best to rigidly attach to one side of the lazy susan. Now you can put a simple shaft and bearing in the inside ring. One more note, if the load is not great, and you don't care about ...


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