Siemens SINUMERIK 828D Turning, Руководство по эксплуатации функций

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W1: Tool offset
18.6 Toolholder with orientation capability
Basic Functions
1506
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Machine with rotary workpiece
On machines with rotary workpiece, the vector l
1
has no significance. If it contains a value other than zero, this is
ignored.
The kinematic chain for machines with rotary workpiece is shown in the figure below.
Figure 18-40 Kinematic chain to describe a rotary table
Vectors, which describe offsets in the rotary table, are positive in the direction from the machine reference point
to the table.
The following kinematic type is defined for machines with a rotary workpiece:
$TC_CARR23 using letter P
Machines with extended kinematics
On machines with extended kinematics (both tool and workpiece are rotary), it is only possible to turn each of the
components with one axis.
The kinematic of the rotary tool is described with the first rotary axis (v
1
) and the two vectors l
1
and l
2
, that of the
rotary table with the second rotary axis (v
2
) and the two vectors l
3
and l
4
. The two kinematic chain components
for machines with rotary tool and rotary workpiece are shown in the figure below.
Note
On machines with rotary workpiece it is generally useful if the selected machine reference
point and the reference point of the table are identical. Selecting the reference points in this
way has the advantage that the position of the workpiece zero in the initial state (i.e. with
rotary axes not turned) does not change when the rotary table is activated. The (open)
kinematic chain (see figure) is then closed.
In this special case, therefore, the following formula applies: l
2
= - (l
3
+ l
4
)
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