Re: LHT-25B - Small Turret Lathe

"Bob La Londe"  wrote in message news:vnrjpm$1gfoa$1@dont-email.me...
I don't know how I would QC it
though.  I guess the end part would have to be the QC.
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One of the old manual methods Holtzapffel mentioned to create an index plate is to step dividers around a scribed circle and keep adjusting them until the last step equals the first. That task could consume a boy's entire apprenticeship time.
I made a graduated dial for the crossfeed of my AA lathe, which has a 5/16-24 thread. That comes to 41-2/3 spaces per rotation. I'll never know if I got it right.
Later I was tying up a military satellite uplink with a test pattern of 10 million bits at 2400 per second. When the manager asked when I would be done that dividing exercise let me mentally figure the test would run for 4,166.7 seconds, or 1 hour, 9 minutes and 26.7 seconds (3600+540+26.7). He gave up trying to confirm it on his calculator.
Afterwards I was assigned more challenging and interesting design tasks, interfacing an atomic clock oscillator to an embedded computer and designing a 16 bit data acquisition system for a Macintosh, good jobs for a technician without an EE degree.