Saturday, September 02, 2006
XY Axes Controller Board Schematic...
Have a look. Any comments and criticisms will be very welcome.
I was thinking I'd need two; how do you determine both the minimum and the maximum? Software?
I was thinking of putting in two limits per axis, and having the software automatically calculate the working space (I.E, the same board would work for a 10cm axis, and for a 50cm axis.)
That was the traditional way of thinking about it. Indeed, if you put them on fixed places on the axis and then wait for the bit that moves to come to those sensors you will need two.
If, on the other hand, you put the sensor on the bit that moves and have it look for scribed marks on the axis you only need one.
I suspect that if you compare prices you'll find that the Hamamatsu limits detector is actually cheaper than a microswitch.
Rubber bands and copper wires was more towards what I was leaning towards. Easy to make, easy to put together, and should work most of the time. :)
I used Schottky diodes with the Frankenmotor board. I may use them on this one eventually, too, though it seems like a bit of overkill for such small motors.
I'll post them when I've finished.
I'm looking forward to that. :-)
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