5x130 is translated to 5 holes that are 130mm apart?

What is the distance to center, and what formula did you use to come up with the answer?

65mm

130mm dia circle, 5 studs spaced at 72deg. No formula reqd. 65 mm to center.

I think not ...

Think I know where you were going with t his thread. If you don't have an indexer on a mill, you need to trig out each hole for X/Y coordinates, or use this. (all of our machines have it built in, so does your mach3 )

http://www.doov.com/cgi-bin/bolthole.cgi

Someone that pays attention to details.

I drew them up in bobcad... and I switched over to the linux box with EMC2 on it. It let the CSOB in me buy more stepper drivers instead of more software.

I did a circle array every 72 degrees; now to get the back lash out of my rotary table again. I had it *perfect*, and then had to disassemble it for the stepper motor mounts.

And thank you for the link, I have it bookmarked now.

(on second thought, I don't really need the rotary table, I have the x/y table pretty dialed in and I can adjust the 'round' on the lathe when it shows up)