Originally Posted by ESjaavik I used EMC with steppers for my TOS FN20 conversion.
The drives are 9A and 12A 70V from Phytron. No breakoutboard, as the drivers have optoisolated input/outputs.
So far I'm not happy with this solution. I can get it up to F500 before it droops out with following error. This on a 1GHz Pentium. Just dragged in a Shuttle PC with 2GHz today to see if I can tease it higher. You'll get the same problem with step/dir inputs on servo drives I guess. The pro is you can make electronic handwheels by driving the inputs directly. |
I never thought of driving the inputs directly, I was just skipping over the part of the manual where it talked about controlling the drive with an external encoder. I might try this. I was going to use an encoder interface board to get the handwheel into the computer.
Originally Posted by ESjaavik
I may switch to servos later, but have to see if my drives are compatible with EMC. As my drives have their own current/speed/position PID loops that may be a problem since EMC has this built into it.
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I think this can be tuned so it will work.
Originally Posted by ESjaavik
I will install either electronic handwheels or a joystick. I just have to see first whether I go for servos or keep the steppers.
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I've been using a Haas a little, and I must say that the handwheels are really almost essential.
Originally Posted by ESjaavik
The limit switches: I must admit I haven't installed them yet. And so far I've hit the clamps/vice a couple of times, but not the limits. That's when you realize it's just a computer and it cannot see your clamp. If you tell it to go straight through it, it will. But it's highly unlikely even a 15mm cutter will come out on the other side.
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Maybe this is why nobody has a schematic of how their limit switches are hooked up.
