10 Jul
2015
10 Jul
'15
8:48 a.m.
On Jul 9, 2015, at 9:21 PM, steven at malikoff.com
wrote:
Wow, I wake up and you blokes on the other side of the world have been busy during the
night working at getting a bunch of details for me :)
Thanks Barry, Pete, Paul, Noel, Bill, Adam for your responses - the measurements and
photos are exactly what I need. I'll go through them in
detail soon and adjust the drawing.
Paul: I will revisit the postscript file and fix up mine from it. There's a reason I
try to avoid splines in my CAD drawings, a long time ago
I did DXFs for laser cutting some keyrings (see
http://web.aanet.com.au/~malikoff/jeep/keyring) using splines. The cutter operator
replaced
them with arcs owing to their software not being able to process it properly. Since then
I've avoided splines for any drawing I do that has a
chance of being exported as a DXF (or SVG for that matter) that is to be fed to a CNC
device.
Wow, it?s amazing that a device like that would be bothered by splines. It speaks to the
lack of competence on the part of the implementer. Perhaps this problem dates back to the
dark old ages of first generation cutters and has been cured by now? If not, you can
approximate things with arcs, but for it to look reasonably close to correct you need more
short arcs than you have now.
I'll also follow up on your observation about the
variations in the handbooks font, I'm sure I'll find them on bitsavers.
Not on bitsavers as far as I know (though Al is welcome to place a copy there if he wants
to do so). But you can find it on John Wilson?s site, at
http://www.dbit.com/pub/misc/handbook.ttf
paul