Operating Instructions
3-2
HP6A Manual
If the hone head crashes into a web or obstruction the pinion will twist or break. This
condition is not covered by warranty.
Raise hone head until stones extend about 1/2” out of the top of the block. Lock the upper stop in this
position. Do not over tighten.
Automatic Cycle Operation
Automatic Load:
When operating in Automatic Cycle, the machine will maintain a set motor load percentage until the
desired amount of material has been removed from the bore. The Rough and Finish Load is set using the
“Inc +” and “ Dec -” buttons on the control panel and can be changed at anytime.
Rough Load:
When the feed ring is on any number other than zero and the machine is in Automatic operation the
control will automatically maintain the Rough Load value set in the control display.
Finish Load:
When zero is reached on the feed ring in Automatic Cycle operation, the machine will automatically
switch to a preset Finish Load, and continue stroking until this value is reached. Refer to page 2.3 to set
the Finish Load. Once the Finish Load is activated by the feed ring, the value can be change while
operating. The Finish Load value has a large effect on the finish cylinder accuracy. Thin wall cylinders
generally require a lower finish load for accuracy than thick walled cylinders. The finish load is commonly
set between 15% and 40% depending on the accuracy required.
Start Honing:
Press Start / Stop button once. This will start the hone head turning. Press the Coolant button, be sure
the coolant is flowing directly into the cylinder being honed. Press the Stroke button to start the Rocker
Arm stroking. Using the hand wheel feed out the stones until the load meter reads the same as the value
set for the Finish Load. When this value is obtained engage the “ratchet feed release” to prevent the
hand wheel from turning. Now turn the feed ring for the desired stock removal and lock in place using
the setting thumbscrew pictured on page 6.7.
The machine is now ready to begin an automatic cycle. Press the Auto Cycle button and the machine will
automatically feed out until the set Rough Load is reached. Once the rough load is reached, the machine
will automatically maintain that load until “0” is reached on the feed out wheel. When “0” is reached the
machine will display the Finish Load and continue to hone until the Finish Load is reached. When the
Finish Load is reached the machine will stop at the top of the stroke.
Manual Stroking:
For some jobs you may wish to manually stroke the hone. This is done the same as any other honing
sequence except, don’t lock the upper travel limit lever, and don’t press the stroke button. Use the Start /
Stop button to start and stop the hone head rotation. Pump the Rocker Arm up and down by the handle
on the end.
DO NOT operate the power stroking without upper travel limit lever locked.
Damage to the machine and injury to operator may occur.
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