Siemens SINUMERIK 840D sl Programming Manual

Reference points
R Reference point
Position defined by output cam and measuring system. The distance to the machine
zero M must be known so that the axis position at this point can be set exactly to this
value.
B Starting point
Can be defined by the program. The 1st tool starts machining here.
T Toolholder reference point
Is on the toolholder. By entering the tool lengths, the control calculates the distance
between the tool tip and the toolholder reference point.
N Tool change point
Zero points and reference points for turning
0:
$
5
%
1
;
=
Zero points for milling
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0
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Fundamentals
2.1 Fundamental Geometrical Principles
NC programming
Programming Manual, 12/2019, 6FC5398-2EP40-0BA0 35

Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based