KB Electronics KBIC-240DS - Manual (Page 16)

16
FIGURE 4. ACCEL TRIMPOT
RANGE
1 SEC.
FACTORY
SETTING - - -
2 SEC.
3 SEC. SLOW 4 SEC.
Do Not rotate the
Accel Trimpot into
the shaded area.
7 TRIMPOT ADJUSTMENTS AND CONTROL FUNCTIONS
The KBIC ® is factory adjusted to provide 0 to full speed range using a 5K potentiometer. Minimum and
maximum speed trimpots are provided to change the speed range from other than 0 to full speed. An
acceleration (ACCEL) trimpot (located directly behind the MIN trimpot) is factory set to provide motor
acceleration from 0 to full speed over a time period of 2 seconds (approx.) each time the AC power is applied.
The current limiting (CL, or torque output) adjustment is factory set to approximately one and a half times the
motor rating. The IR Compensation (IR) is factory adjusted to provide excellent motor regulation under normal
operation. See Figure 1, on page 4, for trimpot locations.
Note: In order for the IR comp and CL trimpot settings to be correct, the proper Plug-in Horsepower
Resistor® must be installed for the particular motor and input voltage being used. Do not attempt to change
the settings of the trimpots unless absolutely necessary since they are factory adjusted to near optimum
settings.
IMPORTANT NOTE:
Readjusting the ACCEL time will affect the MAX speed and IR Comp. settings that will have to be readjusted
(see this Section). If the ACCEL time is decreased to the minimum time of 0.5 seconds (6 o'clock trimpot
position), then increase the IR trimpot 25% CW rotation and decrease the MAX trimpot 20% CCW rotation. If
the ACCEL time is increased to the maximum time of 4 seconds (full rotation), then decrease the IR and
increase the MAX as per above percentages of rotation.
The following procedure is presented in required order of adjustment. It should be followed when readjusting
all trimpot functions:
7.1 Acceleration Trimpot (ACCEL)
The ACCEL Trimpot is provided, to allow for a smooth
start over an adjustable time period, each time the AC
power is applied or the Main Speed Potentiometer is
adjusted to a higher speed.
The ACCEL Trimpot has been factory set to 2 seconds,
which is the amount of time it will take for the motor to
accelerate from zero speed to full speed. To increase the
acceleration time, rotate the ACCEL Trimpot clockwise.
To decrease the acceleration time, rotate the ACCEL
Trimpot counterclockwise. See Figure 4.