Siemens SINUMERIK 840Di sl Commissioning Manual page 446

NC Commissioning with HMI Advanced
11.5 Axes and spindles
● MD10210 $MN_INT_INC_PER_DEG (computational resolution) = 1,000 [incr./degree]
● MD31020 $MA_ENC_RESOL (encoder resolution) = 500 [pulses/revolution]
● MD31050 $MA_DRIVE_AX_RATION_DENOM (load rev. denominator) = 1
● MD31060 $MA_DRIVE_AX_RATION_NUMERA (load rev. numerator) = 1
● MD31070 $MA_DRIVE_ENC_RATION_DENOM (load rev. denominator) = 1
● MD31080 $MA_DRIVE_ENC_RATION_NUMERA (load rev. 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]
● Encoder gear stage = 1:1
● Load gear stage 1= 2.5:1 [motor rev./spindle rev.]
● Load gear stage 2= 1:1 [motor rev./spindle rev.]
Gear stage 1:
One encoder increment corresponds to 0,54932 internal increments.
One encoder increment corresponds to 0.00054932 degrees (highest possible positioning
resolution).
446
Commissioning Manual, 05/2008, 6FC5397–4CP10–4BA0
Manual