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Messages - Perfo

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The anodizing is spot on as well, it makes all the difference to a bit of Ally.

wow some real nice stuff there. Can you get belted 22LR over there or did you need to make the round belt as well for the browning?

General Mach Discussion / Re: Spindle RPM
« on: August 03, 2008, 10:04:42 PM »
Tis indeed a tricky one without any details.

hmmm I suppose trailer / Caravan cable would do but it's not screened and not particularly cheap.

I had thought of using Cat5 cable and doubling up the cores (as it 8 core) This would have made a neat solution as I can get them ready made in different colors from ebuyer pretty cheaply so could put RJ45 type sockets (which I've already got from an old 20 way router box) on the back of my control box and on the enclosure for each of the motors keeping everything neat and tidy and no chances of noise being a problem. The only applications I've seen using POE (power over Ethernet) go up to about 720mA per core so I'd only get 1.5A on a pair of cores which isn't enough.

They look pretty similar to the ones I got today, mine are domino 5 pin but I'll only be using four. They aren't locking either like the ones in your link but are a pretty good fit and connection. I've gone for 4 plugs and sockets at the moment as you've suggested to keep the limits etc on a separate plug. Next question is what cable to use? I had some instrument cable that has four cores and is screened but my mind played tricks on me as I thought they had about 1mm core but alas it's only about 0.2 mm So not much good for 5 amps. The motor peak current is 4.2 A so I'm expecting anything above about 1 mm would be sufficient and not give me too much volt drop over the 4 to 5 meter run (preferably screened). how important do you think the screening is? The most crucial part of the screening I would have thought is in the step pulses to the driver as any parasitic elements on this line could distort the wave form but these are a good distance from any motors (noise sources) and very short so I'm not expecting problems there.

LazyTurn / Re: LazyTurn
« on: August 03, 2008, 07:06:57 PM »
Do you use lazyturn on a mill as well or only on Lathes ? I can see me wanting to put another axis on once I get going to do this kind of thing. Learn to walk before running I must constantly remind myself of that :)

Video P*r*o*b*i*n*g / Re: More hands..
« on: August 03, 2008, 07:03:15 PM »
I would offer to try and help with the maths if I wasn't so convinced you are probably miles ahead of me and Id' be more of a hinderence having to start right back at first principles.

Video P*r*o*b*i*n*g / Re: More hands..
« on: August 03, 2008, 01:31:29 AM »
30 seconds is pretty fast for such complexity. It becomes more feasible to do multi passes at slightly different angles the quicker a single scan gets. Matching all the different scans then would be more of a headache I suppose.

Video P*r*o*b*i*n*g / Re: More hands..
« on: August 02, 2008, 11:00:10 PM »
You are obviously a very patient fellow or do you use it as some sort of meditation whilst scanning. Doesn't it take a fair while to scan ? Very promising results.

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