Shop is Sufficiently Together to Make Stuff

Somehow, one of the four steel doughnuts that were bolted to the rolling platform on which Big Bertha rides got lost in the move. I am not sure why I made these of steel unless I had that available. No need for that tough or stiff.

I had a piece of 2.5" diameter acetal so I cut off a slice, trimmed it to .501" thick, then bored a 1.5" hole through the center with a Forstner bit on the lathe. (That oversimplified it. Cutting that much acetal in one pass is clumsy and ugly so I drilled through the center with a 1/4" drill bit first, then a 1/2" Forstner bit, then the 1 1/2" bit.) Then to get 3 1/4" holes at 120 degrees each, I put the ring on the rotating table and entered commands to drop the bit to 0" then down to -.65", back to 1", rotate 120 degrees and repeat. (If I had been making more than one, a program would have been neat to watch running.)

Now with the Crossbow Equatorial Platform on top.

Now I just to work up the energy to get Big Bertha out of his box, clean the mirror, which is a big task with such a big mirror and then reassembly.