Detailed description
2.2 Metric /inch measuring system
Basic logic functions: Velocities, Setpoint/Actual Value Systems, Closed-Loop Control (G2)
20
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
2.2.2
Conversion of basic system by parts program
Conversion factor
The factor for the inch to metric conversion for the data input and output can be adapted via
the following machine data:
MD10250 $MN_SCALING_VALUE_INCH (conversion factor for switchover to inch system)
Note
The machine data element is not visible unless the password of protection level "Siemens" is
set.
By changing the default value, the control can be adapted to a customerspecific measuring
system.
When programming, it is possible to change over between measuring systems for some
workpiece-related specifications with
G70
/
G71
/
G700
/
G710
. The data that can be influenced
by
G70
/
G71
/
G700
/
G710
is described in the Programming Guide.
The basic position
G70
/
G71
/
G700
/
G710
can be assumed channel-specifically via the initial
setting (reset) of the G groups in the machine data:
MD20150 $MC_GCODE_RESET_VALUES[12]
.
When changing the measuring system via the relevant soft key on the HMI, these initial
settings are automatically predefined to appropriate settings for the new measuring system
with
G700
or
G710
.
With the axis-specific machine data:
MD31200 $MA_SCALING_FACTOR_G70_G71
(factor for converting values with active
G70
/
G71
/
G700
/
G710
)
can be used to freely select the conversion factor between metric and inch conversion with
G70
/
G71
/
G700
/
G710
programming.
The controller can be adapted to a customized measuring system by changing the
predefined settings. The factor only takes effect if parts program programming differs from
the initial state.
Example:
Initial state: inch; (MD10240 $MN_SCALING_SYSTEM_IS_METRIC=0)
Parts program:
N15 G70
; Factor is not effective, since the setting is exactly the same as the initial
state.
N20 G71
; Factor is effective.
The current setting (selected with
G70
/
G71
) and the initial state can be the same or differ at
any given time. The current setting is channelspecific, the initial state applies to all channels.
Summary of Contents for SINUMERIK 840D sl
Page 282: ...Index Basic logic functions Acceleration B2 64 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 388: ...Basic logic functions Travel to fixed stop F1 Function Manual 11 2006 6FC5397 0BP10 2BA0 52 ...
Page 962: ...Index Basic logic functions Emergency Stop N2 20 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1704: ...Constraints Basic logic functions Spindles S1 94 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1716: ...Index Basic logic functions Spindles S1 106 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 1996: ...Index Basic logic functions Tool Offset W1 208 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2150: ...Table of contents Basic logic functions Appendix 4 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...
Page 2184: ...Glossary Basic logic functions Appendix 38 Function Manual 11 2006 6FC5397 0BP10 2BA0 ...