> BTW, some of steppers I have are quite special. Their axles have
> internal M5 threads, so they can actually run on a stationary
> leadscrew, could be very useful for a small cnc. No way to eliminate
> backlash, though.

> Originally those were tuning resonant chambers in NOKIA 900MHz
> GSM base station modules. Actually moving a copper plate in an
> aluminium box

Hey, mine too, except the box was copper. A kg each those boxes,
got a good price for them and the aluminium guide blocks. Kept a few
back and the copper discs and microswitch/actuator assemblies

http://home.clear.net.nz/pages/joecolquitt/RF_tuner.jpg

What I do have left over are dozens of the spacers, which I assume
are some sort of ceramic. They're quite heavy and solid, no idea what
I could do with them. Haven't thrown them away just in case

Joe
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