I want to know which drive is better. I’ve been hearing the X-Drives are faster. I’m looking for the drive out of these two that offers better mobility - going forward
X-Drives are faster, but offer less torque
If what you want is mobility then I would say an X-drive is probably the better choice because it offers increased speed and the ability to strafe from side to side
Here is an explanation of the speed of an X-Drive:
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An X-Drive is used when you need to manuver to catch items or get them in weird areas. For this years game I would go with a tank drive because it will be easier to gear up for speed and it will give you more support to attach a possibly needed lift.
I am not sure that I agree with the explanation and here is why. The explanation stated that the two configurations had the same number of motors. That to me would indicate each robot had 4 motors, one at each wheel. Yet when discussing the tank drive in the article, it was only using two motors to travel in the y-direction. However it has 4 at its disposal. Why the restriction to using only 2 of its four motors? The X-drive really has only two that will operate in the y-direction as the other two are at right angles to the direction of motion. Therefore, the speed in the y-direction will NOT be identical. The tank drive will outpace the X-drive in the y-direction (all else being equal). And if turned 90 degrees, the tank drive will outrun the X-drive in the x-direction as well. The X-drive (in its “forward” direction compared to the Tank drive’s “forward” direction) will only be faster if the Tank drive is less that 1.4 times faster in either the Y-direction or X-direction.
By tank drive you mean controls and not tank treads right?
They only diagrammed 2 motors because more adds adirional torque but not speed. In an x-dive however the other wheels are in different directions, so they must be factored in.
So when you add additional motors to a tank drive you do not add the rpm’s together so additional motors would not increase speed it would stay at 100 rpm
X drives with the math thru pythagorean theorem go about 141 rpm which is about 1.4 times faster than a tank drive
When people say thank drive they usually mean controls. Mostly because tank treads have not been popular for drives
Here’s a similar thread. I don’t think there is a definite resolution, but the general consensus is in agreement with AURA’s conclusion. There is also a shifting x-drive video with a link posted in the thread. You can see the difference in speed in the video.
EDIT: Added the link here as well.
I figured I just wanted to double check