Messages

191

General Mach Discussion / Re: Feedrate glitch

« on: February 12, 2010, 04:51:50 PM »

I do not recall noticing it before.  Sometime when I have some time I'll write some raw code by hand to test it. 

192

General Mach Discussion / Re: Feedrate glitch

« on: February 12, 2010, 04:04:48 PM »

Can't attach the code.  Was using copy cat to cut off a piece.  Never saved it when I was done. 

193

General Mach Discussion / Re: Feedrate glitch

« on: February 12, 2010, 03:30:13 PM »

Maybe for wood routing I can take advantage of that and do all my rough pocketing at a diagonal for faster feed.  LOL. 

194

General Mach Discussion / Re: Feedrate glitch

« on: February 12, 2010, 03:29:00 PM »

Nope.  No over ride and the setting showed at 20, but the actual speed showed at 27-28. 

195

General Mach Discussion / Feedrate glitch

« on: February 12, 2010, 12:01:29 PM »

Hmmm....  I was just noticing something while cutting off a part yesterday.  After an F20 command, and my motors set at a max for 20 I was getting diaginal cuts at 27-28 IPM.  It was visibley faster than the axis parrallel cuts.  Is this something I just have to live with?  Obviously neither motor is exceeding its individual speed, but the net result is a much faster feedrate. 

In this case I was using a full 1/8 cutter with enough rigidity and speed to handle it, but if I had been using a smaller mill and pushing my feed speed for the cut I could easily has snapped it with a sudden increase like that. 

196

Video P*r*o*b*i*n*g / Re: Video Edge Finder

« on: January 27, 2010, 10:44:38 PM »

Seems llike rotating and splitting the distance would be a lot simpler assuming the spindle post is true. 

197

Video P*r*o*b*i*n*g / Re: Video Edge Finder

« on: January 27, 2010, 02:23:55 PM »

Hmmm...  I was just re-reading your comments and I'm not sure I understand how that procedure could zero it mathematically.  It could tell you if your Z-axis post is straight (perfectly perpendicular) in relationship to the table though.  If it was an auto focus camera or it was a little easier to refocus than the cheap CMOS board cameras usually used for this sort of thing it might a great tool for Z-axis alignment to the table

For aligning the camera to the z-axis you rotate the camera.  You might be able to do it with software by zeroing to a refference mark, rotating the camera 180 degrees rezeroing to the refference mark and then dividing the distance and moving the crosshairs.  I do not see how you could do that by moving the camera vertically though.  Maybe I misunderstood.  

198

Video P*r*o*b*i*n*g / Re: Video Edge Finder

« on: January 27, 2010, 11:45:09 AM »

For squaring it wouldn't even need to be aligned.  Just for accurate edge finding and point location. 

199

Video P*r*o*b*i*n*g / Re: Video Edge Finder

« on: January 27, 2010, 11:43:04 AM »

I didn't see that in Mach 3.  Am I missing it?  Mine is mechanically aligned with the spindle now, but I can see it changing and needing to be rechecked periodically with normal bumping and bouncing. 

200

Video P*r*o*b*i*n*g / Video Edge Finder

« on: January 27, 2010, 12:10:22 AM »

I bought one of zarzuls cameras with the shaft mount.  I had a heck of a time trying to adjust it last night.  Never could get it as close as I wanted.  I studied it a bit after work today, and decided to make the two side screws set a little more uniformly off to each side of the camera.  It took me about 15 -20 minutes after that to get it zeroed in pretty darn good.  It bisects the tiniest construction lines I could draw on a piece of paper as perfectly as I can see to do at a range of about .375 from the work surface.  I can see spatter of the graphite on both sides of the cross hairs at 0, 90, & 180.  Looking at the gap in my caliper and comparing it to my lines I'm guessing my line width right at or a touch over .001.  That would make this setup within .001 plus machine lash and spindle runout. 

Its pretty cool. 

Then just for the heck of it I setup some clamping hardware on the mill table.  I set a pair of perpendicular stops on the table at one end using my old square and rock method.  Then I set my small vise on the table using the camera to zero it.  Wow its fast.  Set one and and put the cross hairs on one end of the fix jaw.  Set soft zeros at that view.  Zip to the other end of the jaw and adjust the vise position to match.  Hit goto zero and if its still on the mark its square.  I had to go back and fourth about three times total, but it was super fast.  Way faster than using a mechanical edge finder.  Atleast for me. 

It also showed me I need to surface my fixed vise jaw.  LOL. 

Its pretty cool as an inspection camera too.  Shows all the imperfections and irregularities that you normally think are perfect even when using a magnifying glass.