Scratching - Siemens SINUMERIK 810M Operating And Programming Manual

3 Operating Sequences

3.2.13 Scratching

3.2.13 Scratching
If there is a breakdown during the program process, e.g. a tool breakage, you must leave the
contour by changing to the "JOG" or "INC1...1000" operating mode, in order to change the
tool.
After entry of the new tool length compensation (the cutter radius remains unchanged) you
traverse the tool to return to any point on the contour - within the interrupted block -
("Scratching").
Sequence of operation
+X +Z
– 4
– Y +Y
+4
– Z – X
AUTO-
MATIC
and
or
In a block with circular interpolation (G02, G03) the
scratching must take place within a very narrow range.
This range is defined with machine data.
Standard definition via MD "9".
If the range is exceeded: alarm 3018: "Distance from contour too great (NC MD9)".
3-138
Prerequisite:
A tool change has been carried out;
The control is in " JOG " mode;
Using the direction keys, now traverse to any point
that lies within the interrupted block.
Using the operating mode selection key (integrated
machine control panel) and softkey ...
or
... with this symbol on the operating mode selector
switch (external machine control panel) select
"AUTOMATIC" mode.
Resume the program process with "Program start".
© Siemens AG 1990 All Rights Reserved
09.91
6ZB5 410-0EQ02
SINUMERIK 810M, GA3 (BN)