Siemens SINUMERIK 802C base line Technical Manual page 78

Start-Up
Parameterization example
Servo gain
Service display of the axis behavior
Servo Trace
Dynamic adaptation for thread G331/G332
Function
Activation
4-40
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.
The servo gain default setting is K
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.
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..").
The dynamic response of spindle and involved axis for the function
G331/G332-thread interpolation - 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.
The values for the adaptation are entered in MD 32910 DYN_MATCH_TIME
[n], usually for the axis. The adaptation is only possible if MD 32900
DYN_MATCH_ENABLE =1 has been set for the axis/spindle.
=1 (corresponds to 1mm following error at a
v
SINUMERIK 802C base line
Start-Up