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
coil winding sensor
Jun 17, 2008
14 Replies
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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