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Entry  Wed Aug 24 16:13:36 2011, kiwamu, Update, SUS, broke UL magnet on ITMX 
    Reply  Wed Aug 24 17:05:11 2011, Jenne, Update, SUS, Broken UL magnet on ITMX 
       Reply  Thu Aug 25 15:20:03 2011, Jenne, Update, SUS, Broken UL magnet on ITMX 
          Reply  Thu Aug 25 17:57:35 2011, Suresh, Update, SUS, Broken UL magnet on ITMX 
          Reply  Fri Aug 26 07:53:59 2011, steve, Update, SUS, Broken UL magnet on ITMX 
       Reply  Fri Aug 26 15:30:36 2011, Jenne, Update, SUS, ITMX magnet reglued 
          Reply  Sat Aug 27 14:33:04 2011, Jenne, Update, SUS, ITMX magnet status 
             Reply  Sun Aug 28 20:15:11 2011, Jenne, Update, SUS, ITMX magnet status 
Message ID: 5308     Entry time: Fri Aug 26 15:30:36 2011     In reply to: 5299     Reply to this: 5311
Author: Jenne 
Type: Update 
Category: SUS 
Subject: ITMX magnet reglued 
The ITMX UL magnet has been reglued.

I *very carefully* using the corner of a cleaned razor blade dropped single drops of acetone onto the top of the dumbbell, and scratched off the residual glue. I didn't want to get even a sprinkle of acetone on the dumbbell-glass junction, and I managed to avoid it. Also, the dumbbell never broke off of the glass (something I've never been able to achieve before), so all I had to do was glue the magnet back onto the dumbbell.

I also scratched the glue from the magnet, after soaking in acetone. I made sure to keep track of which way the magnet had been glued by putting it in the pickle picker that I received from Betsy before getting rid of the glue. I specifically did not compare the polarity of this magnet to the others still glued, because I have seen that in the past break magnets from dumbbells. They can't really handle sideways forces. But since it's glued the same way that it was, it should be fine.

I then aligned the optic in the gluing fixture. I test-fit the pickle picker with magnet, to ensure that the axes of the dumbbell and magnet were aligned as closely as possible. I adjusted the optic to make this axial alignment as perfect as I could see with my eye. Unfortunately the fixture doesn't allow a whole lot of viewing angles of the magnet-dumbbell joint, so we'll see how well I did after I remove it from the fixture.

I put a little dab of epoxy on the end of the magnet, spread it around so it coated the whole surface, and glued it on.

I'll come in tomorrow (Saturday) to check on it, and take it out of the fixture. If it's going to break coming out of the fixture, which I hope won't happen, but has happened before, then I want to be able to fix it again asap.
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