At 04:51 PM 11/8/2002 +0000, [EMAIL PROTECTED] wrote:
The printout I have suggests that for no rotation, do not use the rotationBased on my recollection:
parameter. IMHO it sounds like the manufacturer's interpretation of the gerber data is not correct.
That is the same error that Protel made, probably based on the same incorrect assumption. If you download the complete RS-274X specification, you will discover that zero rotation means that a point of the polygon is on the y-axis. This might have been a bad decision on the part of those who wrote the spec, since 99% of the uses of this shape (as an octagon) would have the flats orthagonal to the x and y axes. The manufacturer is following the specification as carefully intepreted without making the assumption that zero rotation for an octagon gives you the same thing as a non-rotated square but with the corners chamfered.
I do understand why they made the decision, though. For polygons with an odd number of vertices, normal-to-the-flats would be weird.
At the very least, the specification should have been much more explicit!
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