I am somewhat, perhaps to an unhealthy degree, frightened of adhesive. Not of it’s contents, or it’s consistency; it’s texture or it’s smell, but of the permanentness of it. While I understand there are somethings that are worth making permanent, the assembly of an experimental galvanometer is by no means one of those things. I question both my ability to line up the parts without smearing the epoxy, and their placement. Perhaps the dimensions won’t even be correct!

Alas I am afforded a bit of consolation in the opportunity to “dry-fit” the components of the galvo project before committing to final assembly. No thermal epoxy or cyanoacrylate, no worries when things need adjustment. I seized the opportunity and have included a number of pictures (inside this post) demonstrating the details of the assemblies, as they finally resemble something that will actually work.

The PD rotor was easy to get perfectly round with the following simple technique: 1) Cut out the disc roughly with scissors. 2) drill a hole perfectly in the center of the disc. 3) mount the disc on the Dremel using the abrasive-disc mount. 4) spin the disc against the sand paper or a file to round it, similar to the way a lathe works.

Of course there are plenty of additional photos in the Album. Enjoy!