The last major mechanical part is done. That was the coupler between the X-Drive shaft and the the X ball screw. I got the inside diameters right on the first try! Yay! The holes have been corrected on the X and Y drive.
What was wrong? Measure it three times, draw it, check it, then cut. I think I screwed up step one. There were different errors on each pair of holes. I amazed even me on this one.
The first time I measured I did it with a steel rule. The assumption was the Bridgeport would use "standard" dimensions. Wrong. Close, but no cigar. I also assumed the Y drive shaft would be centered in the thrust plate. It's not. So I measured something that say looked really close to 1.5" and assumed it was 1.5. In hind sight this sounds really dumb, I know. Last time I do that.
2nd go round I put bolts in all the holes and measured off the bolts. They had to be snugged up good to get them as close to center as possible. I tried to allow for dimensional problems with the bolts. They were pretty much +/- .002. But .375 bolts turned out to be .370 and stuff like that. .005 is literally a hair but it adds up right?
Anyway, tomorrow is assembly day. Then on to electronic hook ups.
-jd