
B-63943EN-1/02 9.5-AXIS MACHINING FUNCTION
- 1025 -
Limitation
- Manual intervention
When manual intervention is made for a rotation axis while the
manual absolute switch is off, the compensation vector is calculated
using the position present before the manual intervention.
Example: When a manual intervention of 1.0 degree is made for the
C-axis which is positioned at 30.0 while the manual absolute
switch is off, the machine coordinate value of the C-axis
becomes 31.0. At the start of automatic operation after the
intervention, the absolute coordinate value of the C-axis becomes
30.0. So, the compensation vector is calculated with C = 30.0.
- Hypothetical axis of a table rotation axis
When a table rotation axis is set as a hypothetical axis, tool center
point control is performed on the assumption that the table rotation
axis is at 0 degrees.
- Deceleration at a corner
Under tool center point control, the controlled point may move along a
curve even if a straight-line command is issued. Some commands
may cause a corner movement.
For this reason, the tool may decelerate if small values are set as the
permissible speed difference in a corner (parameter No. 1783) and
permissible acceleration (parameter Nos. 1660 and 1737).
- Look-ahead acceleration/deceleration before interpolation
When using tool center point control, use look-ahead
acceleration/deceleration before interpolation at the same time. If
look-ahead acceleration/deceleration before interpolation is not used,
alarm PS5420 is issued.
Example:
Interpolation
path
Path of tool
center point
In the above example, the feedrate is controlled so that the tool center
point moves at a specified feedrate, so the feedrate on the interpolation
path is equal to or higher than the specified feedrate. At this time,
look-ahead acceleration/deceleration before interpolation allows the
feedrate to be clamped so that the feedrate on the interpolation path
does not exceed the maximum cutting feedrate or maximum rapid
traverse rate.