Detailed description
2.2 Metric /inch measuring system
Basic logic functions: Velocities, Setpoint/Actual Value Systems, Closed-Loop Control (G2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
21
Application:
With this function it is possible, for example, with a metric basic system, to machine an inch
thread in a metric parts program. Tool offsets, zero offsets and feedrates remain metric.
Machine data are output to the screen in the basic system selected in:
MD10240 $MN_SCALING_SYSTEM_IS_METRIC (basic system metric).
Machine coordinates, tool data and zero offsets are always displayed in the initial state,
workpiece coordinate displays are in the current setting.
If programs including data sets (zero offset, tool offset) programmed in the measuring
system, which differs from the basic system, are read in from an external source, the initial
state must first be changed via machine data MD10240.
Data exchange with the PLC of interface signals containing dimension information, e.g.,
feedrate for path and positioning axes, is always carried out in the selected basic system.
Supplements
G700
/
G710
extends the functionality of
G70
/
G71
as follows:
1.
The feedrate is interpreted in the programmed measuring system:
–
G700: length parameters [inch]; feedrates [inch/min]
–
G710: length parameters [mm]; feedrates [mm/min]
The programmed feedrate is modal and therefore remains active after subsequent
G70
/
G71
/
G700
/
G710
commands. If the feedrate is to apply in the new
G70
/
G71
/
G700
/
G710
context, it must be re-programmed.
2.
System variables and machine data specifying lengths in the parts program are read and
written in the programmed measuring system.
This allows you to implement parts programs that are independent of the current default
measuring system.
Comparison of the effect of
G70
/
G71
and
G700
/
G710
on machine data and system variables
in the parts program:
•
With
G70
/
G71
: reading/writing in the basic system
•
With
G700
/
G710
: reading/writing in the programmed measuring system
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 ...
