 Recently I've found myself working on more and more projects/hacks that I want to share. I'm disorganized and my interests go here and there, which might mean this blog format will be a good match for me, since blogs are like that too. Follow the links at the left to visit the more persistent parts of the site; the content below will change.
Old programmer lore tells us that the last 20% of a project takes 80% of the time. This problem, combined with my tendency to stop working on a project as soon as it does what I want, has led me in the past to never share any of my unpolished work. I've decided to try to overcome that, not by changing my personality or work habits, but by sharing my 80%-finished projects anyway. I think they're useful as-is, and if you do too, that's great. If you don't think they're quite useful yet, please add on what you need.
| Bus. | 28 April 2008, 2:43 UTC |
Lots of my time lately has been spent helping with the Bus. It is a lot of work but we are making nice progress. It has given me many chances to play machinist. I've also tried playing welder, with not as much success.
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| Floating point irritant | 28 January 2008, 0:31 UTC |
#include <stdio.h>
int main(void) {
float d=0.0;
d+=0.1;
d-=0.1;
printf("%g\n", d);
return 0;
}
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| New feed calculator plot | 29 December 2007, 17:28 UTC |
I tweaked this to go a bit higher on the teeth/min axis. Still goes with the SFM plot
Files attached to this page:
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| Limit/Home switches for Max | 27 December 2007, 4:56 UTC |
 Since the kinematics require the center of rotation of the C axis to be at X,Y = 0, I really needed home switches. I found a way to get full limits and home (for the table motion only) using only two switches. You can barely see the other switch on the left. There are four cams (ramps?).
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| First 5-axis part | 24 December 2007, 4:15 UTC |
 I cut the first part on my 5 axis mill. I helical-milled two holes and then with the tool tipped at 45 degrees, countersunk them using the side of the same end mill.
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Since the kinematics require the center of rotation of the C axis to be at X,Y = 0, I really needed home switches. I found a way to get full limits and home (for the table motion only) using only two switches. You can barely see the other switch on the left. There are four cams (ramps?).
I cut the first part on my 5 axis mill. I helical-milled two holes and then with the tool tipped at 45 degrees, countersunk them using the side of the same end mill.