
PROGRAMMING22. RISC PROCESSOR
B–63534EN/02
672
:Tool center path
:Programmed tool path
Example(1)–3 Example(1)–4
Actual tool
Reference tool
Actual tool
Reference tool
Workpiece
Workpiece
:Tool offset value
Fig. 22.5.1 (f) Operation in the compensation mode (1)–3, 4
(2) When the tool moves at a corner, the feedrate of the previous block
is used if the corner is positioned before a single–block stop point; if
the corner is after a single–block stop point, the feedrate of the next
block is used.
:Tool center path
:Programmed tool path
Example(2)–1
F100
Tool
Program(2)–1
:
N1 G90G41.2 Xp Yp Zp Bp Cp D1 ;
N2 G01Xq Yq Zq F100 ;
N3 Xr Yr Zr F200 ;
:
N2
N3
P’
P
Q1’
R’
R
Q
Q2’(Single block stop point)
Fig. 22.5.1 (g) Operation in the compensation mode (2)
In the above example, the single block stop point of N2 is Q2’, so that
the feedrates along paths P’–Q1’ and Q1’–Q2’ are the same, namely,
F100.
(3) When a command is specified to make the tool retrace the path
specified in the previous block, the tool path can match the locus of
the previous block by changing the G code to change the offset
direction. If the G code is left unchanged, the operation shown in
Example (3)–2 results :