Surface machining (#CYL, #CYL OFF)
This mode can be selected for lathes and machining centres. The desired contour on the cylindrical surface is programmed in millimetres or inches using a virtual coordinate system.
Notice
As of CNC build V3.00, the parameter P-CHAN-00262 must be assigned with the vale 15 for this transformation in order to perform lateral surface machining applications.
Depending on the machine type, the three logical axes X, Y, Z are provided to program the contour in Cartesian coordinates on the lateral surface. As a general rule, the Y axis is not present on lathe-only machines. The workpiece radius must also be included in the programming as reference radius R.
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The main plane in lateral surface machining is formed by Z-C.
Lateral surface machining in G17
An axis configuration Z-C is formed by specifying the first and second main axes with #CYL [...]. This implicitly defines a main plane in G17. The reference radius must also be specified.
Syntax: |
#CYL [ <1st_main_axis_name>, <2nd main_axis_name>, <3rd_main_axis_name>..] |
<1st_main_axis_name> | Name of the first main axis according to the current main plane. |
<2nd main_axis_name> | Name of the second main axis according to the current main plane (virtual linear axis, development). |
<3rd_main_axis_name>. | Axis name of the third main axis according to the current main plane with specification of the reference radius in [mm, inch]. |
Notice
Programmed tracking axes are not affected by the transformation. It is not permitted to change the main plane with G18, G19 while lateral surface machining is active
This mode is deselected by:
Syntax: |
#CYL OFF |
Use #CYL OFF to revert to the previously active state. This means that the last active main plane is selected automatically and the last active axis offsets are restored.
Programing Example
Programming example for lathes, programming in G17 with Z-C
Example with axis name "C" for 2nd main axis
…
#CAX [S, C] ;Assuming “S” is main spindle
G01 X60 C45 F800 ;Feed and positioning movement; X:60mm C:45°
#CYL [Z, C, X60] ;Select lateral surface machining
G00 G90 Z0 C0 ;Z: 0mm C:0mm!
G01 C100 F500
G02 Z100 R50
G01 C0
Z0
…
#CYL OFF
#CAX OFF
M30
Lateral surface machining in G19
Use #CYL LATERAL [...] to create an axis configuration which, in combination with G19, allows programming in the virtual coordinate system C-Z. The reference radius must also be specified.
Syntax: |
#CYL LATERAL [ RADIUS=.. ] |
RADIUS=.. | Specify reference radius in [mm, inch]. |
Notice
Programmed tracking axes are not affected by the transformation. After #CYL LATERAL, the use of G17 or G18 is also permitted; this may be necessary for special machining cases.
This mode is deselected by:
Syntax: |
#CYL OFF |
Use #CYL OFF to deselect lateral surface machining and restore the previously active axis configuration with the associated axis offsets. The currently valid main plane remains active.
Programing Example
Programming examples for lathes, programming in G19 with C-Z
%cyl_lat_A
N020 G00 X0 Y0 Z0
N020 #CAX [S,C]
N030 G00 X0 Y0 Z100 C0
N040 #CYL LATERAL [RADIUS=35] ;Deselect lateral surface machining
N060 G19 ;Select G19 plane
N070 G01 G90 Z0 C0 F5000
N080 G01 G90 X10 F5000
N090 $FOR P2=1, 5, 1
N100 P3=P2*4
N110 P4=P3+2
N120 G01 G91 C-P3
N130 ZP3
N140 C[2*P3]
N150 Z-P3
N160 G90 C0
N170 G91 ZP4
N180 $ENDFOR
N190 $FOR P2=1, 5, 1
N200 P3=P2*4
N210 P4=P3*2+2
N220 G90 G02 KP3
N230 G91 G01 ZP4
N240 $ENDFOR
N270 #CYL OFF
N280 #CAX OFF
N290 M30
%cyl_lat_B
N020 G00 F2000 X0 Y0 Z0
N030 #CAX [S, C]
N040 #CYL LATERAL [RADIUS=20]
N060 G19
N070 G01 F1000 Z0 C0 X0 G161
N080 G02 J30 K0 C60 F2000
N090 G02 J30 K0 C0
N100 G02 J0 K30 Z60
N110 G02 J0 K30 Z0
N120 G03 J-30 K0 C-60
N130 G03 J-30 K0 C0
N140 G03 J0 K-30 Z-60
N150 G03 J0 K-30 Z0
N180 #CYL OFF
N190 #CAX OFF
N210 M30
