04-19-2012, 05:53 PM
Hi Turbo,
Have a look at http://en.wikipedia.org/wiki/Geometric_d...olerancing - it gives a brief rundown on what the dimensional tolerance symbols mean!
Starting with the parallelogram in a box, that's telling you there's a 0.005" limit on flatness;
The (+) crosshair shows positional tolerance - 6 or 10 thou";
(M) tells you that dimensions are "maximum material condition" - or "as big as it's allowed to be"!;
© and -©- tells you that those dimensions are symmetric about a centre-line.
It *looks* like the .748" dimension is between the mid-points of the two upper bevels, so it should be triggable from that assumption?
Just my ha'pennorth,
Dave H. (the other one)
Have a look at http://en.wikipedia.org/wiki/Geometric_d...olerancing - it gives a brief rundown on what the dimensional tolerance symbols mean!
Starting with the parallelogram in a box, that's telling you there's a 0.005" limit on flatness;
The (+) crosshair shows positional tolerance - 6 or 10 thou";
(M) tells you that dimensions are "maximum material condition" - or "as big as it's allowed to be"!;
© and -©- tells you that those dimensions are symmetric about a centre-line.
It *looks* like the .748" dimension is between the mid-points of the two upper bevels, so it should be triggable from that assumption?
Just my ha'pennorth,
Dave H. (the other one)
Rules are for the obedience of fools, and the guidance of wise men...
(Douglas Bader)
(Douglas Bader)