
B–62444E–1/04
B. ALARMS
APPENDIX
591
Alarm Description
3020
Cause Cutting in bar machining is impossible because of the relationship
between the tool angle, cutting edge angle, and clearance angle
(parameter 9801) for the tool used.
This alarm is raised when the sum of the above three angles is less
than or equal to 90° or is greater than or equal to 180°.
Action Check the tool angle and cutting edge angle or parameter 9801.
If the angles are incorrect, set correct values for the angles. If the
parameter is incorrect, set a correct value in the parameter.
If the sum of the three angles is less than or equal to 90° or is great-
er than or equal to 180° even after the change, change the tool.
Reference Section 13.1 in Part II SETTING DATA
3021
Cause The part to be left in automatic residual machining cannot be de-
termined.
This alarm is raised when the intersection of the end point of the
part to be left and the figure cannot be calculated (the part to be
left is determined by the tool angle, cutting edge angle, and clear-
ance angle (parameter 9801)) for the tool used.
Action On the figure data screen for the process corresponding to this
alarm, check the machining figure. If the figure is incorrect, enter
correct figure data. If the figure is correct, the tool cannot be used
for that figure. So, change the tool for the process data or change
the clearance angle (parameter 9801).
Reference Section 1.1 in Part III BAR MACHINING
Section 13.1 in Part II SETTING DATA
3022
Cause The figure data is incorrect in intermediate bar machining. If there
is a figure whose X–coordinate is greater than that of the starting
point in bar machining, the Z–coordinate of the start point must be
on the end surface of a workpiece after end cutting. Conversely,
if the Z–coordinate of the start point is not on the end surface of a
workpiece after end cutting, there must be no figure whose X–
coordinate is greater than the X–coordinate of the start point. This
alarm is raised when an attempt is made to execute a figure violat-
ing the above conditions.
Action On the figure data screen for the process corresponding to this
alarm, check the figure data. If there is incorrect data, enter correct
data.
Reference Section 1.1 in Part III BAR MACHINING
3024
Cause The figure data for automatic residual machining in bar machining
is incorrect.
This alarm is raised when the change of the X– and Z–coordinates
for the figure for automatic residual machining is not monotonous.
Action On the figure data screen for the bar machining process corre-
sponding to this alarm, check the figure.
Reference Section 1.1 in Part III BAR MACHINING
3025
Cause A correct tool trace cannot be calculated in bar machining.
This alarm is raised when there is an error in the result of internal
calculation (for example, when the value under a square root sign
is negative because of an error in calculation).
Action Contact FANUC.