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4.7 Commissioning
4-81
SINUMERIK 802C
6FC5 597–3AA20–0BP2 (01.02)
Parameterization example
Encoder: 2500 [10,000 pulses per motor revolution]
Load gear: 1:1
Leadscrew pitch: 10 mm
Motor speed: 1,200 rpm
MD 30130 =1
MD 30240 =2
MD 31020 =2500
MD 32250 =80%
MD 32260 =1,200 rpm
MD 32000 =12,000 mm/min
The hardware of the drive must be set such that it will reach exactly 1,200 rpm at 8 V.
Servo gain
The servo gain default setting is K
v
=1 (corresponds to 1mm following error at a velocity of 1m/
min).
The servo gain can or has to be adapted according to the particular mechanical conditions.
Too high gain will result in vibrations, too low gain in a too high following error. It is imerative
that the drive observes the set speed characteristic (MD32250, MD32260). In addition, the
continuous characteristic of the speed when passing zero is also imperative.
Service display of the axis behavior
Servo Trace
To provide axis service, the Servo Trace function is integrated in the Diagnosis menu, which
can be used for graphical representation of the axis setpoint speed.
The Trace function is selected in the Diagnosis/Service display/Servo Trace operating area
(cf. User Manual “Operation..”).
Dynamic adaptation for thread G331/G332
Function
The dynamic response of spindle and involved axis for the function G331/G332– thread inter-
polation – can be adapted to the “slower” control loop. Usually, this concerns the Z axis, which
is adapted to the more inert response of the spindle.
If an exact adjustment is carried out, it is possible to sacrifice of a compensating chuck for
tapping. At least, higher spindle speeds/smaller compensation paths can be achieved.
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