On Sun, 20 Feb 2011 17:20:54 -0500, Bob Engelhardt
wrote:

Bob Engelhardt wrote:
I just made a 2-MOTE (MOT electromagnet) brake ...

I checked the phasing of the MOTE's & they were indeed out-of-phase,
meaning that there was some flux shorting through the brake's structure.

I put them in phase and tried bending some test pieces. There was a
distinct improvement: it will now bend 20 ga (.040 +-), where it would
only do .030 before.

That's good news and bad news. The good news is obvious, the bad news
is now I'm uncertain what to do. Before, I had ruled out using MOTE's -
now, I don't know. MOTE's would be easier and faster than winding my
own electromagnet in the style of the Magnabend, but just barely strong
enough.

The other thing I did was look into doubling up the windings by adding a
winding from another MOT. The problem is that other windings either
don't fit at all, or just fit. The just-fit ones are really too tight
to use without damaging them. This is 30 ga wire.

Can you round the edges of the laminations to ease the fit and prevent
shorts?

--
The more passions and desires one has,
the more ways one has of being happy.
-- Charlotte-Catherine