516
G R A H A M M O T O R S A N D C O N T R O L S V A R I S P E E D
®
A 2 0 0 0R E L I A B I L I T Y + C O M P A T I B I L I T Y S I N C E 1 9 3 5
STAND ALONE VERSION
The VariSpeed A2000 has been set up at the factory to satisfy most
application needs. You may, however, wish to tailor your control
specifically to your application requirements. If so, use the following
instruction for proper set-up.
NOTE: Before making any adjustments, start control and run
motor fully loaded for at least 30 minutes so that motor
temperature will stabilize. (Motor speed will increase as
temperature increases unless tachometer feedback is used.)
Factory Settings
Min. Speed - Zero Volts
Max. Speed - 90VDC Output for 120VAC line
- 180VDC Output for 240VAC line
IR Compensation - Zero
Accel - 1/2 Second
Decel - 1/2 Second
(Clockwise increases minimum speed)
MIN SPEED may be adjusted from 0 to 50% of motor base speed.
1. Turn speed pot fully counter-clockwise (CCW).
2. Turn MAX SPEED trimpot fully CCW.
3. Adjust MIN SPEED trimpot until desired minimum speed is set. If
desired minimum speed is zero, adjust trimpot so that motor
barely stops turning. (This will give the best motor speed linearity.)
NOTE: If unit will not obtain 0V output with MIN SPEED trimpot
fully CCW, turn THRESHOLD trimpot CCW.
4. Reset MAX SPEED ADJUSTMENT.
Drive shown without protective barrier.
Drive shown without protective barrier.
SET-UP PROCEDURES
>>
CHASSIS PLATE VERSION
>
MINIMUM SPEED ADJUST (MIN)
>
6.50 (165)
6.12 (156) (5)
0.19
3.87
(98)
0.72
(18)
Optional isolation board
2.0
(51)
2.75
(70)
5.31
(135)
8.00 (203)
7.38 (187)
(8)
0.31
4.31
(109)
0.31
(8)
Optional isolation board
2.25
(57)
3.15
(80)
4.94
(125)
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