All JRA motion control cards plug into any PC compatible
ISA bus slot.
Both cards utilize PWM/Sign motor output for speed and direction.
Both controllers support brush-type DC motors with incremental quadrature
encoder feedback.
Matching amplifiers and motors are available through JRA.
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Servo 2 System Features:
Affordable high performance digital servo controller based on
the
National Semiconductor LM629N-8 Motion control IC.
Each card independently controls 2 servo motors.
User selectable I/O address.
More axes may be added by simply using more cards.
Shaft mounted optical encoder provides velocity, position, and
acceleration feedback.
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Get the 84.6 kb PDF Servo 2 file here 
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DSP- 4
Four axis PC based controller card based on the PMD 1401A
chipset CNC software available.
Independent or simultaneous control of up to
4 dc servo motors PWM and SIGN
output for motor command.
16 digital inputs on board for user I/O
16 digital outputs on board for user I/O
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Get the 151.6 kb PDF DSP-4
file here .
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