Mitsubishi FX3U-20SSC-H User Manual page 188

FX -20SSC-H Positioning Block User's Manual
3U
Note
• The center coordinate is always handled as a relative address from the start point.
• When setting the same address for the start and target points, the work piece moves in a perfect circle.
The center coordinate specification is available in the perfect circle operation.
• Pulse rate and feed rate
Set ratios that are the same for the pulse rate to the feed rate for the X-axis and the Y-axis if the version is
earlier than Ver.1.20. Set the interpolation gear ratio selection function in the X- axis, Y-axis when the ratio
of the pulse rate to the feed rate differs between the X-axis and the Y-axis for versions Ver.1.20 or later.
• During continuous pass operation
If the circular path is too short and the travel time from the start point to the target point is shorter than the
interpolation time constant, the operation temporarily stops and shifts to the next interpolation operation.
• When interpolation operations are consecutively repeated in a table operation, the 20SSC-H provides
continuous pass operation.
2. Operation information
Set a circular interpolation operation ("center, CW direction" or "center, CCW direction") and an absolute/
relative address in the operation information.
3. Speed information
The actual operation speed (vector speed) is "X-axis operation speed 1 x X-axis override setting."
The operation speed 1 for the X-axis can be changed using the operation speed change function except
under the following conditions.
• During deceleration operation
• When the speed change disable during operation signal is ON.
4. Position (address) information
The absolute/relative address can be specified in the operation information.
With the specified absolute address: Specifies a target address (position) using address 0 as the base.
With the specified relative address:
5. Circle information (center coordinate)
Set the center coordinate (i, j) by a relative address from the start point.
182
→ For details on the interpolation gear ratio selection, refer to Subsection 7.11.3
→ For details on the continuous pass operation, refer to Section 10.10
Specifies a travel amount from the current address.
→ For change of the operation speed, refer to Section 7.6
9 Positioning Control
9.11 Circular Interpolation Operation