Hello Uwe,
I made an extremely simple 'driver unit' for a 4-coil stepper motor
for a magnetic loop years ago.
The 'driver' didn't contain any electronics at all : Just a homemade
PCB with a central axis, a wiper (from an old relais contact), and
sizeteen copper segments on the PCB connected to the four coils in a
1-2-3-4-1-2-3-4-1-2-3-4-1-2-3-4 sequence (1..4 = coil numbers). So
when turning the wiper 1 turn clockwise, the motor did sixteen steps
clockwise, and vice versa.
A crank handle made the unit a bit more user-friendly, also for
quick rotation. I thing the motor had 3.5 degrees per step, so the
loop tuning was very accurate (and reproducable if the number of
turns on the 'driver' side was counted).
73,
Wolf DL4YHF .
Am 01.11.2010 11:10, schrieb Uwe Wensauer:
Hi
would like to drive ( tune) Variometer with
stepper motor
Any idea or hints ?
73
Uwe, dk1kq
|
|
