Warning! If possible, do not adjust trimpots with main power
applied. If adjustments are made with main power applied, an insu-
lated adjustment tool must be used and safety glasses must be worn. High
voltage exists in this control. Fire and/or electrocution can result if caution is
not exercised. Safety Warning, on page 5, must be read and understood
before proceeding.
A. Maximum Speed (MAX) –
Sets the maxi-
mum speed of the motor. The MAX trimpot
is factory set for 100% of base motor speed.
For a higher maximum speed setting, rotate
the MAX trimpot clockwise. For a lower
maximum speed setting, rotate the MAX
trimpot counterclockwise. See Figure 11.
To Calibrate the MAX Trimpot:
1. Adjust the MAX trimpot to the desired
position and set the Main Speed
Potentiometer for full output voltage.
2. Monitor the armature voltage and readjust the
MAX trimpot to the desired voltage.
B. Minimum Speed (MIN) –
Sets the minimum speed
of the motor. The MIN trimpot is factory set for 0%
of base motor speed. For a higher minimum speed
setting, rotate the MIN trimpot clockwise. See
Figure 12.
19
110
120
150
PERCENT OF BASE SPEED FOR SCR RATED MOTORS
70
100
(SHOWN FACTORY SET TO 100%)
FIGURE 11 – MAX
TRIMPOT RANGE
15
0
5
22
30
PERCENT OF BASE SPEED
(SHOWN FACTORY SET TO 0%)
FIGURE 12 – MIN
TRIMPOT RANGE
!
