5238-E P-37
SECTION 3 MATH FUNCTIONS
5-3.
Torque Skip Command (G22)
[Programming format]
G22 Z__ D__ L__ F__ PZ =__
[Details]
•
For the target point and the set torque value, designate the axis to be fed..
•
An alarm (alarm A 1220) occurs if the preset torque value is not reached when the second-
process chuck has moved to the virtual approaching point.
•
Designate a value equal to or smaller than "2.5 m/min (8.20 fpm)" for F.
•
Before setting a value for PZ, check the actual motor torque value** at axis feed at the feedrate
designated by F, and set a value for PZ which is larger than the actual torque value by 10%.
LE33013R0300500110001
Feedrate F
→
F/5
Z
: Target point (mm)
D
: Distance between the target point and the approaching point as an incremental value
(mm)
L
: Distance between the target point and the virtual approaching point as an incremental
value (mm)
F
: Feedrate (mm/min or mm/rev)
PZ
: Preset torque value (%)
** Check the RLOAD value displayed on the axis data page of the CHECK DATA screen.
If the preset torque value is too small, it is reached during approaching motion, resulting in an
occurrence of alarm 1219.
Z
: Target point
D
: Distance between the target point and the approaching point as an incremental value
L
: Distance between the target point and the virtual approaching point as an incremental value
First-process chuck
Second-process chuck
The explanation here is for a case in which a
workpiece is transferred from the first-process
chuck to the second-process chuck.
1. The second-process chuck approaches the
workpiece at feedrate F.
2. The feedrate is reduced to 1/5 of F at the
approaching point (Z - D) point).
3. The second-process chuck contacts the
workpiece at target point Z.
The servomotor is controlled so that the
second-process chuck is kept pushed
against the workpiece.
4. When the motor torque reaches the preset value,
the NC recognizes workpiece seating to be
complete, and the next program block is executed.
L D
Z
