Although I can admire folks that go to great extremes (.00x") to manage run out, align saw blades, fences and miter gauges I just can't understand the effort. In order to understand I'll need to see the improvement in results. I posted a couple of pictures of cutting melamine in "Weekly Blog, May 13th". As you can see, there is absolutely no chip out!
I used a second hand circle saw (bought from a pawn shop) with a second hand carbide 7.5" blade and a homemade saw guide. (all pictured). The resulting cut was straight, no chip out on the top and only two small chips on the bottom, in a 34" cut. The cut was good enough to enable gluing a 1/2" oak edge to it. That piece is now a folding leaf on the end of my wife's embroidery work table.
I have many more pictures of doors, joints, panels and projects that show no variance from exact, square and otherwise excellent joints and projects. I've never used micrometer type set ups for my SS nor do I plan to do so in the future. However I would be willing to change if convinced there would be an improved stability, longevity and appearance to my projects.
Do blade adjustments to 3 or 5 thousandths of an inch really result in sharper, flatter, straighter and more accurate cuts? I sincerely doubt it. I'm ready for someone to prove this theory. Yes, in theory such precise adjustments should perform better than those using only bars and squares, but does this theory hold up? For example we can read Forum posts right here, stating the Wixey showed that the manual adjustments were accurate. However the real proof would be have to be illustrated in finished wood products. How can we tell the difference between a product made with a "super adjusted" machine and one with only manual "old fashioned" adjustments. I think we just can't show this! Remember we are working with wood - an inherently unstable product, each piece with separate dimensional properties. Have you ever ripped a board and watched it spread apart or pinch together? Of course we have! We do our best to re-cut, plane and otherwise straighten and flatten work pieces to make project parts, but how can we be absolutely certain of those pieces' dimensional stability? We can't! We even design furniture taking wood movement into consideration and allowing for it. Even after squaring a workpiece, it may change dimension by .003" before we get it installed in our project.
Were the craftsmen of 200 years ago at all concerned about thousandths of inches? Does this furniture still hold up? What would the Shakers say?
Sorry! One of my pet peeves are manufacturers of woodworking products that tout accuracies in the thousandths of inches. To me this is truly baloney!
Octogenarian's have an earned right to be a curmudgeon.
Chuck in Lancaster, CA