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1  Using Arduino / Motors, Mechanics, and Power / Re: Multiple turn motor position control on: October 19, 2011, 03:54:09 am
To find out the exact number of turns you could use a Hall type of magnetic sensor. A small magnet is attached to the shaft and the sensor detects everytime it passes.

The challenge is to somehow permanently save it's position, I'd prefer some way of initialising the position to a 'start' setting at reboot/power loss instead of using the memory. I'd prefer some mechanical way to initialise it's start position. My guess is the hard stop on one end is the way to go, you can turn always towards the hard stop, then start counting from there.

2  Using Arduino / Motors, Mechanics, and Power / Stepper motor library question on: October 18, 2011, 04:07:46 pm
Hello, I was looking at this ULR:
And I wonder if the library uses the microstep or the other principle for 4-way stepper motor control?
Can anyone explain to me which way the library uses please? The microstep way seems a lot more advanced and I suspect it is more efficient.


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