hello,
I want to make a coil winding machine, I would like to implement a sensor so I can count the velocity of the wire I am coiling so I can accurately count the length of the wire, is there any type of sensors out there that can do that. thanks k
Search on "optical interrupter".
To count turns you attach a wheel to your coil spindle that has a slot (or slots) in its edge. Then you shine a light through the path of the slots, and receive the light with a photo transistor. Then you count the number of times the light flashes, divide by the number of slots, and you have a turns count.
-- Tim Wescott Wescott Design Services http://www.wescottdesign.com Do you need to implement control loops in software? "Applied Control Theory for Embedded Systems" gives you just what it says. See details at http://www.wescottdesign.com/actfes/actfes.html
-- But that only gives him turns, not length of wire, and if he\'s winding more than one layer... To get length he could run the wire over a slotted idler. JF
the problem is that the sensor sees the wire, but this is thin wire and I dont think the sensor will actually the wire moving. I think by adding a control wheel with rubber around it while adding a sensor to that wheel could work good enough.
k
You could measure the added weight of the bobbin after winding and, with reference to weight-per-metre data from the wire manufacturer, calculate the length. Seems the simplest way to me.
Chris
-- It would be nice to know how much wire was going on the bobbin (or whatever) as it was being wound, otherwise how would you know when you were finished? JF
-- You\'ve just described an idler. JF
I need about 1 pound, which is roughly 2100 feet.
k
Disassemble an old mechanical mouse, attach a shaft from one axis roller to your control wheel. Presto! Instant pulse counter.
Forward *and* reverse. Straight into your computer.
-- And your point is...? JF
-- snip --
By achievement of the required number of turns?
Perhaps I've misunderstood - maybe this is about coil winding of resistors not inductors or transformers!
Chris
-- Perhaps, but all the OP has stated is that he wants to measure the _length_ of wire used to wind a coil (not the number of turns) and that one pound of the wire is about 2100 feet long.
nope, making an electro magnet. I dont think I will pursue with the project as is though. or at least leave it for a while.
k
nope, making an electro magnet. I dont think I will pursue with the project as is though. or at least leave it for a while.
k
Why 'velocity'? Why not just a wheel and counter?
Good Luck! Rich
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