Summary - Telescoping Mechanism

[dgschaefer]

The short answer is that there's no easy way to get a 3 part assy that
will move like this through dragging. You can get it to do that if you
model the ball bearings in the drawer slide and add the proper
connections to them. More trouble than I want to go through for a model
of a purchased part.

I guess you can use motors that move at different speeds to drive the
assy as I described, but that won't work by dragging. Again, more work
than I wanted to do.

The real answer was to check my assumptions on the slide. It *seems*
that the middle race moves at half the rate of the inner, but it doesn't
*have* to. The middle race is actually free to move independent of the
inner. So, a simple mechanism with limits does the trick.

Doug Schaefer

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