Mini-Mag Service Manual V1.0
13
13-2
CENTRAL COMMAND CONTROLLER
SOFT START
Three of the outputs; traction, brush & vacuum, have a soft start function on them. This
function provides the ability to start and stop a motor gradually over a measured period
of time, 0-10 seconds. This aids in the longevity of the motors and anything driven by
them as it greatly decreases the shock load on them. The soft start settings are changed
through the controller programming.
CONNECTIONS
There are 3 different types of connections that are used on the controller.
MOLEX MINI FIT JR.
The Molex Mini Fit Jr. connectors are used for all of the inputs and the low amperage out-
puts. They require special tools to service and replace them. See the “Electrical System”
Section 12 for serving information.
AMP TERMINALS
The AMP terminals are specially designed terminals capable of handling high amperage
connections. These are used on the high amp outputs on the V.3 controls. See the “Elec-
trical System” Section 12 for serving information.
BINDING POST TERMINALS
Binding post terminals offer the best connection available and are used for the main battery
terminals on both the V.3 & V.4 controllers. On the V.4 controllers the high output connec-
tions have been changed to the binding post type.
TIMED CIRCUITS
The controller has the capability to control a circuit with a certain amount of logic. We can
customize the operation of a component beyond the simple on off operation. Timers are
used for our vacuum motors and our squeegee actuators to make the machine operation
more user friendly. The timer settings are changed through the controller programming.
BATTERY METER
The battery meter is integrated into the controller and the status of the battery is displayed
on the LCD screen. The battery condition is monitored very differently from a traditional
battery meter. The battery condition is calculated by measuring the internal resistance of
the battery pack. The battery meter is designed to read properly when the battery is under
load. It is not uncommon for the battery gauge to climb when the machine is under load.
DOWN PRESSURE CONTROL
The down pressure of the scrub deck is monitored and maintained by the controller. It is
adjusted many times a second to deliver consistent brush pressure with changing floor
conditions. The controller monitors the amp draw of the scrub motors which increases and
decreases with brush deck pressure and floor surface change. The amp draw has a target
value and the controller works to keep the motors at the selected amp draw by increasing
or decreasing brush pressure. The target pressure is represented on the LCD display and
changed using the brush pressure switch on the control panel.
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