> Many PCB packages produce piecewise, or chordic, approximations for > arcs, especially for the Gerber output, even though the Gerber > language itself does support true arcs with the G02, G03 and G75 > codes and always has done. Many use 16chords/360deg, although some > are programmable. Although it doesn't necessarily look that pretty at > this level, the 1/16 chordic approximation only results in a maximum > error of -0.64%, and would be acceptable for most applications.
For flexi-PCBS you need (so I'm told) true arcs; piecewise linear arcs are not acceptable. Eagle plots true arcs (I checked the Gerbers). > This kind of (code) work usually entails much more than it appears at > first, and no - I don't really have time. But that doesn't always > stop us, does it? :-) Heh. In that case I look forward to true copper arcs produced by kicad. I've just discovered (by accident) that ctrl-shift-enter does something very strange in Thunderbird, something which involves displaying a dialog box for about 50ms, so this post might turn up in the list more than once. Or I might have saved the original in /dev/null. Regards, Robert.
No virus found in this outgoing message. Checked by AVG - www.avg.com Version: 9.0.851 / Virus Database: 271.1.1/3064 - Release Date: 08/11/10 07:34:00
