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Update (was :- Mystery Motors - help required)

A

Andre

Jan 1, 1970
0
Hi there all.

Re. the Copal motors extracted from those old Compaq 15/30 DLT
drives, part number LBT79-002 and possibly the -001 variant and others
with the 9-pin connector.

I've got them going :) they need +12 and +5V supplies (logic and
power). Here's the pinout.

Pin 1 = Motor drive enable 0=Off 1=On
Pin 2 = Gnd
Pin 3 = Direction control 0=CCW, 1=CW
Pin 4 = Output from sensor A 2.5V centre
Pin 5 = +12V In
Pin 6 = Gnd (internally connected to pin 2)
Pin 7 = Output from sensor B 2.5V centre
Pin 8 = Output from sendor C 2.5V centre
Pin 9 = +5V In

Connect a 1.5K resistor between pins 2 and 3 to ensure reliable
switching, else pin 3 floats at 1.7V and the motor is unstable.

It may be possible to pulse width modulate the motor enable (pin 1) to
get speed control.

-A
 
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