6
01/2008 "Program" operating area
6.7 Free contour programming
6
© Siemens AG 2008 All rights reserved.
SINUMERIK 840Di sl/840D sl/840D Operating Manual HMI-Advanced (BAD) - 01/2008 Edition 6-293
Free text input
Under "Free text input" you can enter a comment that is inserted in the
program at the end of the contour (e.g.,, specifying the technology,
feedrate, M function).
Contour allowance
By selecting "Contour allowance", you can specify the allowance
parallel to the contour and the side of the contour on which the
allowance applies. It is displayed as an allowance in the graphics
window.
It is possible to change the allowance and the parameters from the
original contour. These changes are applied to subsequent machining
operations in the part program, e.g., for grinding.
6.7.2 Undercuts for turning technology
Function
Limitations
The form E and F undercut and form DIN 76 and general thread
undercut functions are only activated when turning technology is
enabled.
The display machine data 9020: TECHNOLOGY is evaluated to
determine the technology.
Form E and F undercuts as well as thread undercuts are only
available if level G18 is set. Undercuts are only permitted on contour
edges of the rotational body, which run in the direction of the
longitudinal axis (usually parallel to the Z axis). The longitudinal axis is
identified by the machine data.
The machine data 20100: DIAMETER_AX_DEF for turning machines
contains the name of the transverse axis (usually X). The other axis in
G18 is the longitudinal axis (usually Z). If in MD 20100:
DIAMETER_AX_DEF does not contain a name or contains a name
that does not conform to G18, there are no undercuts.
Undercuts only appear on corners between horizontal and vertical
straight lines, including any straight lines, which are at 0°, 90°, 180° or
270°. A tolerance of ±3° is required here, so that conical threads are
also possible (these undercuts do not meet the standard in this case).
To Next Page
Loading...
Need help?
General
