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That's awesome! Seeing how wholly dependent modern manufacturing is on CNC makes me respect those early machine operators even more. They were constantly inno
by jcims 5y ago
That's awesome! Seeing how wholly dependent modern manufacturing is on CNC makes me respect those early machine operators even more. They were constantly innovating on how to apply physical geometry and minimize incremental errors in order to build parts with tolerances that would still hold up today.
- mech422 5y agoMy Dad used to do a 'trick' where he would zero out a 6 decimal place readout on the big ground glass comparator.. You could then move the table anywhere you wanted in X/Y, cover the display, and he would bring it back to 0.0000X by eye :-) He actually went to some institute in Sweden that did ultra-accurate measurements to show them how he did it. I think the 'trick' was, he moved the shadow till it was just past the blueprint, and back it off till a sliver of light shone thru, rather then trying to 'walk' the shadow up to the blueprint.. Neat stuff - but I decided on a tech career when I was mucking out the Holyroyd mill and he turned the cutting pumps on :-P Being drenched in cutting oil convinced me I liked computers better :-P