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TB175 Rev1 Rigid Tapping Troubleshooting
Symptoms Possible Problem Solution/Troubleshoot
Rigid tapping was working and
now when running jobs the
message "Option not
availiable line ??" appears Demo mode ran out and
permanent unlocks not
entered From the Main menu press F7 Utility
then
F8 Options
Verify Tapping Cycles and
Rigid Tapping are on
When running a G74 or G84
rigid tap cycle the control
stops above the hole to be
tapped with a message in the
status window "moving" and
DOES NOT
continue 1 No spindle encoder feed
back
2 No spindle encoder index
pulse
3 On CPU10
the 6th axis
index pulse on CPU serial
number 384 and before
does not work FOR SD1
only systems
1 Verify parameter 35
is set to the correct
axis see TB123
2 Turn spindle by hand check for encoder
movement see figure 1 if no movement
check spindle encoder cable and
connections Figure 2 shows the DB9 pin
out
3 To check for the index pulse on DC
systems turn the spindle by hand and look
for the '*' next to the axis for the spindle in
the PID menu see figure 1
4 To check for the index pulse on AC
systems set the bit to ignore the index pulse
in parameter 36
see TB123
5 Use the 5th axis encoder input on the
CPU10 and change parameter 35
to 20
see TB123
6 If steps 3 4 or 5 indicate the index pulse
is missing check spindle encoder cable
and connections Figure 2 shows the DB9
pin out
When running a G74 or G84
rigid tap cycle you get a "410
Z axis 3 position error" 1 Spindle encoder turning
opposite direction of spindle
motor
2 Spindle speed too high
for tapping
3 Wrong number of spindle
encoder counts 1 Change the sign on the value of
parameter 34
see TB123
2 Try tapping at a reduced spindle speed
3 See figure 1 below to check counts
When the spindle is turned 1 revolution the
number of counts should change by the
value of parameter 34
see TB123
Tapping does not make it to
the bottom of the hole Not
deep enough 1 Not programmed deep
enough
2 Spindle is turning off too
soon 1 Check Intercon or G code program for
depth
2 Parameter 68 69 and/or 82
may need
adjusted see TB123
Breaking taps in blind holes or
tapping too deep 1 Programmed too deep
2 Spindle is turning off too
late
3 Spindle speed is too high 1 Check Intercon or G code program for
depth
2 Parameter 68 69 and/or 82
may need
adjusted see TB123
3 Slow down spindle speed
Press F1 Setup
F3 Config
enter "PASSWORD" F4 PID
to see the menu below
Figure 1 Encoder Input
Figure 2 Spindle Encoder Pin Out
Document History
Rev1 Created on 2005 02 04