Yaskawa YASNAC PC NC Programming Manual - Manual (Page 230)

4 - 93
YASNAC PCNC Programming Manual Chapter 4: Enhanced Level Commands
1. In the decelerated feedrate sections 1 and 2, the tool is moved at the feedrate specified by
the P command in the G 107 block.
In the following conditions, the tool is moved at the decelerated feedrate in the entire sec-
tions.
• If F/150000
≥
L, the tool moves at the decelerated feedrate in the entire section up to
the distance calculated by the following formula.
Distance = L × 2 + F × 2/15000
• If F/150000 < L, the tool moves at the decelerated feedrate in the entire section up to
the distance calculated by the following formula.
Distance = L × 2 + F/15000
2. In the G02 and G03 modes, the tool moves at the decelerated feedrate.
3. Deceleration distance L is the length of tangential line and differs from the lengths along
the axes.
4. For the length of the line, the actual movement distance in which the tool radius offset,
tool length offset, and position offset are included is used instead of the specified line.
5. The blocks inserted due to the execution of the tool radius offset are processed as the nor-
mal blocks.
6. The G107 and G108 commands are not always specified in the same block.
The G108 command is used to change the decelerated feedrate and deceleration distance
after the entry to the G107 mode. Usually, it is used with circular interpolation operation
that will take a relatively long time if the decelerated feedrate which is specified in the
previous block is applied. In such a case, the decelerated feedrate is increased temporarily
by specifying the G108 command to shorten the cutting time.
7. If the feedrate specified by the F command is slower than the decelerated feedrate speci-
fied with the G107 command, the axis movement commands are executed at the specified
F command.
8. The P and L commands specify the decelerated feedrate and deceleration distance which
are valid only for the commands specified with the G107 command and they are different
from the normal P and L commands used to specify the feedrate and number of repetition
times.
9. While the tool is moving in the decelerated feedrate section, “F” flashes at the operation
status display area.