Specifications

GOLDCUP CONTROLS SERIES 500
screw till motor just commences to reduce stroke (increase speed). Lock in this posi
tion.
3. Open servo supply (200 psi min, 1000 psi max.) (14 bar min. 69 bar max.) and
apply current (330 ma Max.), polarity to cause reduced stroke. Adjust minimum stroke
screw for 1/3 stroke. (speed increased to three times initial speed) Lock in this posi-
tion.
4. With motor at 1/3 stroke, shut off servo supply. Motor shall return to full stroke in 3
seconds max..
5. To set jet pipe null adjustment, disconnect electrical connector. Open servo supply.
Rotate the jet pipe null adjustment CCW and CW. Set and lock at the point just before
the stroker begins to reduce stroke (increase speed). Torque to 10 lbs-in. (1.1 Nm)
max Caution: always begin adjustment by backing out (CCW) on the jet pipe null
adjustment and observing control reaction. Over-adjusting clockwise direction
can damage the jet pipe or the trimmer spring. Install O-ring and cover nut.
6. Re-connect electrical signal and zero the “zero adjustment”.
7. Apply 330MA to the control. The motor should go to 1/3 displacement. With the “A”
terminal positive, control shaft should rotate CCW, and vice versa.
8. Check for smooth change in displacement with gradual increase and decrease of
control signal.
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