Milling With A B Axis - Siemens SINUMERIK 840D sl Operating Manual

14.3

Milling with a B axis

No special entries are required for face machining and peripheral surface machining.
Face machining
Milling at the face (G17) is realized on the main spindle in the B axis position B = 0°. If you
are machining at the face (G17) of the counterspindle, then this corresponds to the opposite
setting of the B axis position B = 180°.
Peripheral surface machining
Milling on the peripheral surface is always realized in the B axis position, B = 90° (main and
counterspindle).
Machining on an inclined surface
You can define inclined surfaces in a swivel mask.
You can enter the rotation of the planes around the geometry axes (X, Y, Z) of the tool
coordinate system as described in the workpiece drawing. The rotation of the Work in the
program is then automatically converted to a rotation for the relevant B and C axis of the
machine during machining.
The swivel axes are always rotated to place the tool axis perpendicular to the machining axis
for machining. During machining, the rotary axes are stationary.
The coordinate system is adapted to the surface to be machined irrespective of the required
rotary axis positions.
Turning
Operating Manual, 02/2012, 6FC5398-8CP40-3BA0
Working with a B axis
14.3 Milling with a B axis
623