Lee valley also sells a strap-on level for posts - not metal, but you could rig something it also works well
shelly
Lee valley also sells a strap-on level for posts - not metal, but you could rig something it also works well
shelly
Care to post your design somewhere?
What part of a 9 ply Birch triangle would you like me to post?
The dimensions for openers, and a photograph of it in use.
Sounds like you need to go back and taking drafting 101 or is it CAD
101 these days?In either case, take a hike.
Lew
In other words you didn't make the thing you claim to have made.
See if you are up to this for starters? ====================================== A^2 + B^2 = C^2
A = C(Sin "a") = Altitude of triangle B = C(Cos "a") = Base of triangle C = Hypotenuse of triangle "a" = Desired angle
Select angle "a" and hypotenuse length, then calculate results.
Layout triangle and trim to size. ====================================== Are you that damn lazy or just plain dense?
Lew
That is not a picture of the device you made and used being used to set the blade on a table saw.
Might as well post all 180 of them for 1/2° steps between 0° and 90°. Then, you only need to build a new one if you want something other than
1/2°.
I'd hope everyone with half a brain is that "lazy". That's why millions of tools are sold to measure and set angles...
Accuracy typically claimed at what, 1/10 degree?
How heavy is "relatively heavy?" Heavy enough to deflect a tilted blade a few tenths of a degree?
I like the way you think.
They claim accurate to 0.2°.
I figure close to a pound. I suppose under the right conditions (or wrong conditions in this case) the weight could have an effect on degree angle, but considering all the possible variations one is going to encounter when working with wood, I'd guess any deflection effect is going to be negligible in the grand scheme of things.
And, I forgot to mention one other consideration. For a woodworker, this digital angle gauge has immeasurable toy value. I figure there's hours and hours of play potential incorporated into it. :)
-------------------------
Seems you must have found one. BEG
Yep.
Lew
Gotta be real careful whenever I'm using a dial indicator on a blade (1/8" kerf, standard, thick plate). Seems like a pound force against the side will flex it a good 10 thou or better.
I doubt that one can cut one of Lew's plywood triangles to that kind of precision.
when I worked in a furniture plant, many years ago, we used flat machined plates, 1/4 inch thick, mounted on the arbors to do our initial setup and that eliminated blade runout and problems avoiding the teeth during setup.
basilisk
Gotta be real careful whenever I'm using a dial indicator on a blade (1/8" kerf, standard, thick plate). Seems like a pound force against the side will flex it a good 10 thou or better.
...
.010 (ten thousands at the end of a 5" radius equates to about 0.1°. That's within the claimed accuracy of the gauge.
Generally when I use the gauge, the blade is near it's full elevation, the tilt angle is never more than 45°, and the gauge CG is more like about 2.5 inches from the arbor. So instead of a pound acting normal to the blade at the outer edge, the worst case would be a pound acting at 45° to the blade 2.5 inches from the center. That's only about 35% of the bending moment generated by 1 pound normal to the blade at the outer edge.
Haven't ran an experiment to measure the deflection, and I may do it, but I don't think it's going to cause any serious error in the location or angle of the cut - unless, of course, you're one of the woodworkers who works wood to tolerances the rest of us can only dream about.
Tom Veatch Wichita, KS USA
Well, now I have run the experiment.
Caveats:
Results:
All deflection measurements relative to the unloaded blade fell within the range of 0.0015" to 0.002".
Precision:
Only God knows.
Conclusion:
A tempest in a teapot and not worthy of further concern.
Tom Veatch Wichita, KS USA
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