Ian,
Any chance you know how the unit feels when it is turned off? It could be
either fully braked or totally free. I would expect it to be free. If so
the first thing I would do is to unplug the connector that connects the
brake to the circuit board. If the resistance is still the same, there is a
mechanical problem with the brake or a bearing around there.
If it is now free, there is an electrical control problem. Capacitors go bad
and it is not a big thing to just order replacements and solder them in. The
problem may be in the control panel rather than on the board in the photo
though. Things get more complex up there.
Let me know what you find.
Peace,
Pat
-----Original Message-----
From: Shop-talk [mailto:shop-talk-bounces@autox.team.net] On Behalf Of Ian
McFetridge
Sent: Thursday, October 01, 2015 4:10 PM
To: Shop Talk
Subject: [Shop-talk] Eddy current brake
Hi,
<snip>
None of the capacitors appear to be leaking, which was my first thought
after a loose plug. I don't believe I have the proper equipment to test
further than my multi-meter. I'm guessing the circuit does pulse width
modulation for the brake.
For the most basic hack, I was thinking of putting a rheostat in the circuit
to the brake to see if I can manually adjust the resistance. I have no idea
if that would work or what to buy. There are only two leads going to what
looks like a magnet that I assume is an eddy current brake.
Any input is appreciated.
TIA,
Ian
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