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Control Definition

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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.