User Guide

W
ARNING! To avoid motor winding overheating and failure,
d
o not overboost the motor.
N
ote:
A
n unloaded motor with excessive boost will draw more
c
urrent than a partially loaded motor.
T
he boost voltage may be adjusted as follows:
1. Wire an AC RMS ammeter in series with one motor phase.
2
.
R
un the motor unloaded at approximately 4 Hz (or 120 RPM).
3
.
I
ncrease the boost until the ammeter reaches the motor
nameplate rated current (Amps AC).
4. Using the Main Speed Potentiometer, slowly adjust the motor
speed over a 1 – 15 Hz (0 – 450 RPM) range. If the motor
current exceeds the nameplate rating, decrease the boost
setting.
12.9 JOG (JOG) – The Jog feature must be used with the optional
Run-Stop-Jog Switch. A “jog” speed can be obtained by wiring a
contact from Terminal “JOG” to Terminal “COM”. When the JOG
contact is closed, the Main Speed Potentiometer is disabled and
the JOG Trimpot is used for the speed setting. When the JOG
contact is opened, the drive must be restarted (using the
Start/Stop Switch to “start” the drive). See Figure 39.
A Run-Stop-Jog Switch (Part No. 9524) is available as an optional accessory. See Table 2, on page 8.
25
B
OOST
(
Shown Factory Set to 5 Volts/Hz)
5
0
8
30
2
2
15
F
IGURE 38 – BOOST
TRIMPOT RANGE
35
JOG
(Shown Factory Set to 35% Frequency Setting)
0
25
100
75
50
FIGURE 39 – JOG
TRIMPOT RANGE