Section 5 Operating Instructions HP7A Manual
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5-2
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 and release the upper lock
button. This is the upper limit setting.
Automatic Cycle Operation
ROUGH MODE and FINISH MODE
When operating in ROUGH MODE and FINISH MODE, 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 + and - buttons on the control screen 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. 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 nish cylinder accuracy. Thin wall cylinders generally require a lower nish load for accuracy
than thick walled cylinders. The nish load is commonly set between 15% and 40% depending on the
accuracy required.
CYCLE START
Use the handwheel to feed out the stones until they make contact with the cylinder wall. Press the
Coolant button, be sure the coolant is owing directly into the cylinder being honed. Press the CYCLE
START button to start the motor turning and the rocker arm stroking. The hone will automatically feed
out the stones until the ROUGH LOAD setting is reached. Now turn the feed ring for the desired stock
removal and lock in place using the setting thumbscrew on the side of the feed ring.
The machine is now ready to begin an automatic cycle. 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 stop feeding out and the 0 FEED box will turn red. 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 MODE
For some jobs you may wish to use the MANUAL MODE. In this mode the operator has control over all
functions. The CYCLE START will only start the motor. The STROKE button is used to start and stop the
stroke as needed.
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