Programming instructions

3-14
Motion Commands, Dimension Inputs NC Programming 17VRS
DOK-MTC200-NC**PRO*V17-ANW1-EN-P
Cancel Zero Offsets 'G53'
All zero offsets are canceled by programming G53. This causes the
workpiece coordinate system to be switched to the machine coordinate
system.
•
Depending on the setting in the process parameters, G53 can be the
power-on default and the initial setting when the NC-program starts.
•
If G53 is placed in a NC-block containing G91 only the position display
is switched to the machine’s actual system.
•
If the active zero offsets are canceled using G53 when tool path cor-
rection is active (G41, G42), a G40 (no tool path correction) is issued
internally. The tool correction is rebuilt for the following parameters
NC-blocks.
Adjustable General Offset in the Zero Offset Table
By having an adjustable general offset in the zero offset table, the CNC
can also offset the workpiece zero point in addition to the adjustable and
programmable zero offsets. The adjustable general offset functions in an
additive manner relative to the adjustable and programmable zero offsets.
This means that the adjustable general offset does not become active
until one of the adjustable or programmable zero offsets has been acti-
vated.
•
The adjustable general offset is canceled using G53 and is not calcu-
lated in until the next time a zero offset is selected.
•
An angle of rotation can be entered in the address phi in the zero off-
set table. This angle is added onto the already active angles of rota-
tion.
•
The adjustable general offset can never be active alone due to the
conditions described above.
Reading and Writing Zero Offset Data from the NC Program via OTD
The OTD command (Offset Table Data) can be used to read and write
the data in the zero offset table and the zero offsets which have been
activated in the NC-program from the NC-program.
OTD([1/2],[0..6],[0..9],[0..9],[1..10])
M P O V A
Axis
Offset
ZO Table
Process
NC Memor
y
Please refer to the chapter „Reading and Writing ZO Data from the OTD
Program“ for a detailed description of the OTD command.
Syntax