Siemens SINUMERIK 828D

G2: Velocities, setpoint / actual value systems, closed-loop control
7.4 Setpoint/actual-value system
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
359
7.4.3 Adapting the motor/load ratios
Gear types
The following gear types are available for adapting the mechanical ratios:
Local position of gear unit/encoder
Figure 7-2 Gear unit types and encoder locations
Motor/load gear
The motor/load gear supported by SINUMERIK is configured via the following machine data:
MD31060 $MA_DRIVE_AX_RATIO_NUMERA (Numerator load gearbox)
MD31050 $MA_DRIVE_AX_RATIO_DENOM (Denominator load gearbox)
The transmission ratio is obtained from the numerator/denominator ratio of both machine data. The associated
parameter sets are used automatically as default by the control to synchronize the position controller with the
relevant transmission ratios.
Since a gear stage change is not always carried out automatically, and there are also several ways to request a
gear stage change, the position controller is not always incorporated via parameter sets.
Gear type Activation Adaptation Installation location
Motor/load gear Parameter set Fixed configuration Gear unit
Measuring gear encoder Power ON Sensor-dependent Sensor-side
Load intermediate gear unit NewConfig Load-dependent Tool-side
Note
For further information about the parameter sets for gear stage change, see:
References:
/FB1/ Function Manual Basic Functions; Spindles (S1)
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