KB Electronics KBRG-255 User Manual

Page 15

FIG. 8 – ACCEL TRIMPOT ADJUSTMENT

VIII. TRIMPOT ADJUSTMENTS.

The KBRG-255 contains many trimpots which have been factory adjusted for most

applications. (See table 2, p. 2. for factory settings.) (Note: fig. 1, p. 3 presents the various

trimpots with their locations. They are shown in the approximate adjustment position.) Some

applications may require readjustment of trimpots in order to tailor control to exact

requirements. Readjust trimpots as follows:

A. Forward Acceleration (FWD

ACCEL) and Reverse

Acceleration (REV ACCEL) –

The FWD ACCEL trimpot

determines the amount of time it

takes the control voltage to reach

full output in the forward direction.

It also determines the amount of

time it takes for the control voltage,

in the reverse direction, to reach

zero output. (FWD ACCEL also

sets the Reverse Decel.)
The REV ACCEL trimpot determines

the amount of time it takes the

control voltage to reach full output in

the reverse direction and the time it

takes for the control voltage, in the

forward direction, to reach zero output. (REV ACCEL is the Forward Decel.)
The FWD and REV ACCEL trimpots are factory adjusted to 1 second. The acceleration

times are adjustable to a maximum of 15 seconds. (See fig. 8 for graphic representation

of ACCEL.)

Note: The FWD and REV CL trimpots settings may override the rapid accel and decel

settings.

Note: A 4-quadrant ACCEL/ DECEL accessory module is available as an option. It

provides separate control of FORWARD acceleration and deceleration and REVERSE

acceleration and deceleration.

B. Offset (OFFSET) – This trimpot determines the amount of bias in the forward or reverse

direction. The trimpot is factory set to provide approximately zero offset, which means

neither the forward nor the reverse speed is favored. (See fig. 9 which illustrates the

action of the OFFSET trimpot.)

FIG. 9 – OFFSET TRIMPOT ADJUSTMENT

FIG. 10 – DEADBAND TRIMPOT ADJUSTMENT