4.2 Checking operation
1) Check the operation of the spindle at a low speed.
Example: G84
ZlO,
Fl,
0
S50
2) The spindle speed should be 50 rpm.
Check that it
rotates for 10 turns until it comes to the hole bottom
and returns to the start position.
3) When the spindle normally rotates, perform a cutting
work using a floating tapper.
4) When the floating tapper works correctly without expan-
sion and contraction of the tapper, perform a cutting
work using a tool which contains the floating tapper.
5)
If there is a defect,
take proper countermeasures in
accordance with the following table.
No.
Phenomenon
Remedy
Over droop
(AL0521
1) The position loop detection
occurs.
direction of spindle parameter
1
0RS2 bit E is reversed.
2) The fundamental specification
(tap tl) is too short.
The spindle rotating
1) The setting of close/semi-close
traveling amount does
of spindle parameter ORS2 bit
not conform with that
A is incorrect.
2
being specified.
2) The spindle parameter gear ratio
settings
GRAl
to
GRA4
and
GRBl
to GRB4 are incorrect (in the
semi-close state).
The tap is broken.
1) The axis specification axis
2
The tapping accuracy is tap-g and the spindle parameter
bad.
PGC are incorrect.
2) The fundamental specification
tap-t1
is short.
3
3) The screw pitch F of the program
differs from the real screw
pitch.
4) The tap slips at the chuck.
Replace the existing chuck with
an other one whose tightening
torque is large.
Continued on the next page.
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