Simpler X-Drive Design

We were actually having a conversation about this on discord yesterday. The discussion lasted over 4 hours. In the solution you describe, you theoretically approach infinite speed as the MA gets smaller and smaller. While this may be true (in fact I agree with what you described), many people commonly see it as the following:


Because of this discrepancy, (and the fact that large amounts of evidence and logic were compiled on both sides of the discussion, it is not fair to simply declare one untrue until we experimentally test it.

My point is we were describing different perspectives of the same motion

I get what you are trying to say about different perspectives, but I think you are misunderstanding the perspective im using

this is my perspective

(The motion you are describing is one who’s MA follows a csc/sec function, where csc theta is forwards ma and sec theta is sideways ma, where theta= degrees from tank)

You must just be confusing what the vector does then. The vector you showed earlier is for force, which is inversely related to speed (in this scenario)

Hold on a sec. I got something mixed up

Yes with that perspective of straight the straight direction is faster. When I was talking about diagonal being faster earlier I was referring to the x drive orientation that was shown in the aura article I linked ( it looks like a + sign).


Since most people think of an x drive as an x I see that this is probably where the confusion came from lol

Ok that clarifies it, we were both talking past each other.

P.S. I went back to the discord conversation just now and could not agree more with what tabor was laying out.

Here’s an ancient X-drive from 2009. It’s quite robust, but there’s no room in the center for a manipulator on the “ground”.17169_1352177847975_1337264088_30997648_2949486_n

I’m still on the fence about it until I see testing to be honest :joy:

I have a CAD design of a X-Drive and I am not sure if this is want you want when you say more simple.

Not exactly. Specifically, I would add more bracing between the two sides, with some above the channel and some below. This way your drive will be stronger and have less torsion.

Like this?

Yes, but again I would put some bracing on the top of the C-channels. It doesn’t have to go all the way across, just a small piece on either side to hold it together from the top.

This was for a snail bot so I took off all to bracing it would be easy to add tho

What software are you using to construct that?

AutoCAD Inventor because it is free with the edumacation license.

Thanks

(20 characters)

I’m hole counting this x drive.

Really, I can give you the CAD if you want

I was just wondering, in this design are you using 2.75 in omnis or what size.