Acer ATL 1820E, Operation Manual

Page: 60 / 76

Page 5-5
5.5 TROUBLE SHOOTING
Trouble Cause Countermeasures
Chuck
won’t start
Chuck part is damaged Disassemble and replace
Slide part seized
Disassemble and remove seized
and repair or replace it
Handle
rotation is
hard
Cutting powder or sward is
entered into chuck
Disassemble and clean
Rust occurs at slide part and
rotation part Disassemble and remove the
rust
Short taper is not coincided
with spindle
Modify the short taper
Workpiece
slips
Formed dia. of jaw does not
match workpiece dia. Reform it according to correct
forming method
Clamping force is insufficient
Check the chuck is tightened
with regulated handle torque
Workpiece
slips
Cutting force is excessively
high
Calculate the cutting force and
check whether the force
coincides with chuck
specifications
Speed is excessively
Reduce speed to level where
required clamping force can be
obtained
Oil for slide part and rotary
part is run out.
Lubricate from the ball cap and
make the clamp/unclamp of jaw
without clamping the work
Poor
accuracy
The chuck periphery is run
out
Check to see that periphery and
edge face run out and tighten
the bolts with regulated toque
The forming of jaw
insufficient
Check the forming plug is
parallel for edge face and isn’t
deformed for clamping force
Height of jaw excessively
high and mounting bolts are
extended Reduce the jaw height
5.6 Independent chuck
1. Note whether the clamping chuck is tight or not.
2. Reduce speed to cut irregular work pieces, in order to avoid the vibration
created by the machine.