Control Definition
2-2 HP6A Manual
Plateau Mode:
Plateau mode was designed to be operated with brushes and ridged abrasives after the main honing
process is complete. To place the machine in Plateau mode, put the Rocker Arm in the park position and
then press the “Inc” and “Dec” buttons at the same time. When you release these buttons they should
start flashing. When the buttons are flashing, that indicates the hone is in the Plateau mode of operation.
Pressing the auto cycle in this mode will automatically start feeding the stones out one increment for
every stroke until a 20% load is reached on the display. Once the 20% load is reached the machine will
start counting down each stroke until the displayed number in the Rough/Finish display reaches zero.
When in the Plateau mode the number of strokes that the machine is going to count down is set by
pressing the “Inc” or “Dec” buttons and is displayed in the Rough/Finish display area.
Emergency Stop Button:
Pressing the E-Stop button cuts the power to the display circuit board, and cuts power to the various
relays throughout the machine. All machine functions are stopped. If the machine is stroking when the E-
Stop button is pressed, it may continue stroking until it reaches the top of the travel, depending on the
load on the hone stones.
To restart, turn the E-Stop button counter clockwise, and it will ‘pop’ out. The machine will take approx. 5
seconds to reset, before it will be ready to run again.
Park Position Limit Switch:
An electrical limit switch is located on the carriage under the rocker arm pivot. Both the normally open
and normally closed terminals hook up this switch. A cam on the rocker arm activates the switch. When
the rocker arm is lowered into its working range, the switch is activated and it allows the air control
solenoid valve and the motor drive to be energized. When the rocker arm is raised back up to the park
position the switch is deactivated and the electrical control circuit loses power and the motor load display
blanks out. The two display areas will then read PARK.
Push Buttons:
When push buttons on this display are activated they will light up. When they are deactivated they will go
dark. When the machine is running an automatic cycle the associated push buttons will light as the
machine operates the functions automatically.
Start/Stop Button:
Pressing the Start/Stop button will start the spindle rotating at the speed set by the potentiometer on the
side of the control panel.
NEVER start the spindle with the hone head out of a cylinder block. The Hone
head could come into contact with the operator.
The spindle motor drives the hone head, through a V-belt and then a gear reduction box. The spindle
motor will not operate unless the Park switch is activated (rocker arm down and locked into place).
Pressing the Start/Stop button again will stop the spindle rotation. If any other functions of the machine
are running, such as stroke or auto cycle, all functions will be shut off.
Stroke Button:
Pressing the stroke button will energize the down stroke solenoid.
NEVER activate the stroke button without the stroke adjustment lever locked
into place. This can cause damage to the machine and injury to operator.
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