Originally Posted by
oliverst14@hotmail.com
hiya everyone
this is a total noob question by the way but here goes:
iv been a very careless boy and snapped a scanner mirror off and was wondering how everyone manages to re attach them? im finding it so hard. iv manages it but got a really bad output cause the mirror wobbles in the holder.
ollie
You will have to remove the old mirror bits and adhesive from the galvo shaft slot. I use an inspection microscope to make sure i did a good job. Make up a jig to hold the galvo and one for the replacement mirror. Do a dry run to make sure the mirror sits in the galvo shaft slot at 90 degree and well centered. I use a 2 part 5 minute epoxy and apply a bit to the shaft slot using a toothpick, then insert the mirror and center it. Make sure it's held in the proper position until the epoxy cures or it could sag and result in a wobbly mirror. Make sure no epoxy leaks down to the galvo bearings/shaft junction.
Tip: You can extract mirrors from old Quantum Fireball hard disk drives that are part of the tracking system. Those mirrors are just the right size for galvos and they don't leak more than 5% laser radiation at 405nm /457nm or 473nm (basically good across the visible spectrum into near IR).
Good luck
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