Hi Dave,
Many thanks for your reply to my questions about motor problems. Sorry
for the long delay in getting back to you.
Some time ago, most of the problems we got with the elevation rotators
were due to water getting into the unit, due to the lack of proper
seals. We don't seem to hear much about this recently. Has the sealing
been improved?
I'm hoping to replace my G5500 later in the year, when the weather is a
bit warmer :)
73 Clive G3CWV
Hitchin, North Hertfordshire, UK
On 26/02/2012 17:16, David Palmer KB5WIA wrote:
Hi Clive,
I haven't heard of failures of the controller or software directly, but
this could happen. A more common problem might be mis-calibration, in
that if your elevation rotor reads only 175 degrees and your software
and controller is trying to send it to 180 degrees, the thing will keep
going until it shuts off at the limit switches in the rotor itself
(G5500). I've seen this before, no problem since the limit switches are
fairly robust, but something to keep an eye on.
I plan to use the thermal cut-outs for the extra protection as soon as I
get a repaired / replacement motor to work with.
Yesterday I built a jig for bench testing the rotor. Cables and
connectors are still on the mast, so I needed a way to connect the 7-pin
connector to the controller manually, also to a scope to verify
alignment of the 500-ohm pot sensor. Made jig from 6 individual
connectors through clear plexiglass, broken out to six terminals on
side. That will help with alignment during reassembly.
Also spent some time figuring out how the brake goes together - seems I
didn't manage to get photos of it as I took it off of the motor before
shipping it out, and just yesterday noticed the spring in there and
puzzled over how the heck it works. Think I have it figured out, though.
Dave KB5WIA
On Feb 26, 2012 4:24 AM, "Clive Wallis" <li...@g3cwv.co.uk
<mailto:li...@g3cwv.co.uk>> wrote:
_______________________________________________
Sent via AMSAT-BB@amsat.org. Opinions expressed are those of the author.
Not an AMSAT-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
