Siemens SINUMERIK 840D sl Commissioning Manual page 172

NCK start-up
10.6 Parameterization of spindle data
Example A: encoder on the spindle
Suppose the following conditions are provided:
● The incremental encoder is mounted on the spindle.
● Encoder pulses = 500 [pulses/rev.]
● Pulse multiplication = 128
● Internal precision = 1000 [increment/degree]
● Sensor ratio = 1:1
● Load ratio = 1:1
The machine data are set acc. to the values above:
● MD10210 INT_INC_PER_DEG (computational resolution) = 1,000 [incr./degree]
● MD31020 ENC_RESOL (encoder resolution) = 500 [pulses/revolution]
● MD31050 DRIVE_AX_RATION_DENOM (load rev. denominator) = 1
● MD31060 DRIVE_AX_RATION_NUMERA (load rev. numerator) = 1
● MD31070 DRIVE_ENC_RATION_DENOM (sensor speed denominator) = 1
● MD31080 DRIVE_ENC_RATION_NUMERA (sensor speed numerator) = 1
One encoder increment corresponds to 5.625 internal increments.
One encoder increment corresponds to 0.005625 degrees (highest possible positioning
resolution).
Example B: encoder at motor
Suppose the following conditions are provided:
● The incremental encoder is mounted on the motor.
● Encoder pulses = 2048 [pulses/rev.]
● Pulse multiplication = 128
● Internal precision = 1000 [increment/degree]
● Sensor ratio = 1:1
● Load ratio 1= 2.5:1 [motor speed/spindle speed]
● Load ratio 2= 1:1 [motor speed/spindle speed]
Gear stage 1
172
Commissioning Manual, 07/2007, 6FC5397-2AP10-3BA0
IBN CNC: NCK, PLC, drive