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Special Case of Milling Machines Equipped with Rotary Tables
This concept of part origin only applies to the two axes affected by rotation.
The centre of rotation of the table (OC) has a particular role.
Offset of the centre of rotation (OC/OM) = DAT1
(axes affected by rotation)
Offcentring of the part (OP/OC) = DAT3
(axes affected by rotation)
REMARK For axes other than those affected by rotation, the previous definitions of DAT1
and DAT2 still apply.
Example: rotary axis B
Rotation is around an axis parallel to the Y axis. The axes affected by the rotation are Z and X.
B'
OC
Z DAT1
Z DAT3
OP
OM
X DAT3
X DAT1
Z
X
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