
6.INTERPOLATION FUNCTION B-63943EN-1/02
- 652 -
Therefore, if the maximum servo motor speed is 1000 [min
-1
],
and the servo motor is directly connected to the servo motor:
Upper limit to the tool rotation axis speed = 1000 × 1 = 1000
[min
-1
]
This means the parameters must be set as follows:
No. 7620 = 36000 (angle to rotate through per tool axis rotation)
No. 7621 = 1000 (upper limit to tool rotation axis speed)
(4) Feedrate parameter setting
Because the least command increment is 0.01 [deg], the input
unit for the feedrate is 1 [deg/min].
To obtain a rapid traverse speed of 1000 [min
-1
], for example,
specify as follows:
No. 1420 = 360000 (= 1000 × 360)
Other feedrate parameters must be set in degrees per minute.
(5) Commands from the NC program
When the machine is not performing polygonal turning, the
machining program can issue move commands to the Y-axis.
Such commands can be issued in the same way as for ordinary
axes. However, note the travel increment and feedrate.
The Y-axis rotates through 0.003[deg] by the following
command:
V3;
Likewise, the polygon axis rotates through 1.000[deg] by the
following command:
V1.0;
The current position of the Y-axis in the machine coordinate
system is normalized according to the value specified by
parameter No. 7620.
Typical values range from 0.000 to 359.999.
Signal
Polygon synchronization under way signal PSYN<Fn063#7>
[Classification] Output signal
[Function] Informs the PMC that the machine is in the polygon turning mode.
[Output condition] The polygon synchronization signal is set to logical "1" by the
polygon turning mode command (G51.2) and stays at "1" during the
polygon turning mode.
The signal is reset to logical "0" by the polygon turning mode reset
command (G50.2) or a reset. It stays at logical "0" when the machine
is not in the polygon turning mode.
NOTE
This signal uses the same address for both
polygon turning (using the servo axis) and polygon
turning with two spindles.
Other signals
Some signals related to the CNC controlled axis used as the tool
rotation axis may be made ineffective depending on whether the
machine is in the polygonal turning mode.