Thanks, Brett and Dan.
I bought some Minute Rice, checked out the threads. There was some
very useful information in there. I let the burrs touch, then
rotated it about 3/4 turn counterclockwise. Then I ran about 2-3 oz.
of rice through the grinder. It ground it pretty fine, like sugar,
perhaps. There wasn't a speck of anything in there that wasn't
white. That was very encouraging. It had looked amazingly clean
when I first peered inside, but I was glad nothing funky came out
with the rice. After that, I put an ounce of coffee through it. The
hopper seems like it will hold a couple of ounces, but the tray
won't. It was about 3/4 full. The grind looked pretty even, but I
think it's too fine. It took ,me about a minute and a half to grind
it. At any rate, the grinder seems to be in good working order. I'm
going to go a bit coarser, then use it in my Chemex tomorrow. That
ought to filter out anything else in there that doesn't belong. An
encouraging start today. I'll let you know how it goes tomorrow.