Hunter AutoComp Elite, Operation Instruction Manual, Page: 27 / 33

TROUBLESHOOTING 23
4. Troubleshooting
SYMPTOM PROBABLE CAUSE SOLUTION
Lathe experienced excessive tilt during cut Turn unit off, level the lathe, turn unit on to
desired speed. Re-compensation is not
required.
Cut too aggressive Reduce depth of cut.
Possible defective speed control If error is displayed while adjusting speed;
call Hunter service rep for service.
Displays “or” Too much runout Indicates the unit is out of range more than
.25°. Check setup and start again
The thermal shutdown switches off during work -
ing operations.
Thermal shutdown switch overload Verify the motor’s condition (hot or cold).
CAUTION: The motor may be extremely
hot. Use reverse procedure if applicable
Dirty or warped workpiece All rust, grease, and dirt must be cleaned
from mounting surfaces of the workpiece.
Dirty or dinged adaptors Adaptors must be kept clean. Reface or
replace any damaged adaptors.
Worn or chipped insert Rotate or replace insert as needed
Insert loose in tool holder Insert must be securely fastened to the tool
holder.
Tool holder loose in cutting tool holder bar Tool holder must be securely fastened to
the cutting tool holder bar
Dirt and chips under insert and
tool holders Clean tool holder and boring bar each time
insert is rotated.
Chatter No stabilizer/silencer used Install the proper stabilizer/silencer for the
workpiece.
Cut too deep for chosen RPM Lower the RPM.
Unable to Compensate a) Excessive movement and free-play of vehicle
suspension parts.
Incorrect adaptor chosen.
b) Excessive movement of the vehicle on the lift
during compensation. If necessary, the vehicle
should be stabilized with the vehicle lift placed on its
locks. The vehicle should not be disturbed during
compensation.
Insert holders and/or inserts need reposi -
tioning or replacement.
c) Failure to properly assemble and/or tighten the
mounting and adapter to the vehicle before attach -
ing the lathe. Remove any dirt and rust buildup on
the rotor face and backing plate.
Rotor material is overheated and needs
replacement.