Detailed Description
2.2 Homing /synchronizing
Basic logic functions: Spindles (S1)
36 Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Position measurement systems, spindle
The spindle can be switched from spindle mode to axis mode (rotary axis) if a single motor is
used for spindle mode and axis mode.
The spindle (spindle mode and axis mode) can be equipped with one or two position
measurement systems. With two position measurement systems, it is possible to assign one
position measurement system to the spindle and the other to the rotary axis, or to assign two
position measurement systems to the spindle. Where two position measurement systems
are provided, both are updated by the control, but only one can be active.
NC/PLC IS:
DB31, ... DBX1.5 (Position measurement system 1)
and
DB31, ... DBX1.6 (Position measurement system 2)
are used to select the active position measurement system.
The active position measurement system is required for the following functions:
• Position control of the spindle (SPCON)
• Spindle positioning (SPOS, M19 and SPOSA)
• Thread cutting (G33, G34, G35)
• Tapping without compensating chuck (G331, G332)
• Revolutional feedrate (G95)
• Constant cutting rate (G96, G961, G97, G971)
• Spindle actual speed display
• Axis mode
• Synchronous spindle setpoint value linkage.
NC/PLC IS DB31, ... DBX16.4 (Resynchronize spindle)
In the following cases, the spindle position measurement system must be resynchronized:
• The position encoder is on the motor, a Bero proximity switch is mounted on the spindle
and a gear step change is performed. Synchronization is triggered internally once the
spindle is rotating in the new gear step (see Synchronization procedure).
• The machine has a selector switch for a vertical and horizontal spindle. Two different
position encoders are used (one for the vertical spindle and one for the horizontal
spindle), but only one actual-value input is used on the control. When the system
switches from the vertical to the horizontal spindle, the spindle must be resynchronized.
This synchronization action is triggered with NC/PLC IS:
DB31, ... DBX16.4 (Resynchronize spindle 1)
or
DB31, ... DBX16.5 (Resynchronize spindle 2).
The spindle must be in open-loop control mode.
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