Siemens SINUMERIK 840D sl Operating Manual page 550

Multi-channel support
10.2 Multi-channel editor
Parameter
Tailstock
XRR
Tool change point
XT
ZT
S
Data for
Retraction
XRA
XRI
ZRA
ZRI
Tailstock
XRR
550
Description
Yes

No

Retraction plane tailstock – only "Yes" for tailstock
Tool change point, which must be approached by the revolver with its zero point.
WCS (Workpiece Coordinate System)

MCS (Machine Coordinate System)

Notes
The tool change point must be far enough outside the retraction area that it

is not possible for any tool to protrude into the retraction area while the
revolver is moving.
Ensure that the tool change point is relative to the zero point of the revolver

and not the tool tip.
Tool change point X ∅
Tool change point Z
Spindle speed
Main spindle

Counterspindle.

Empty

If several spindles have been set-up, the program can operate at both
spindles.
The retraction area indicates the area outside of which collision-free traversing
of the axes must be possible.
simple

extended – not for a "pipe" blank

all

Retraction plane X external ∅ (abs) or
retraction plane X referred to XA (inc)
- for "basic" retraction, only for a "pipe" blank
retraction plane X internal ∅ (abs) or
retraction plane X referred to XI (inc)
Retraction plane Z front (abs) or
retraction plane Z referred to ZA (inc)
Retraction plane Z rear – only for retraction "all"
Yes

No

Retraction plane tailstock – only "Yes" for tailstock
Operating Manual, 02/2012, 6FC5398-8CP40-3BA0
Unit
rev/min
Turning