6 Assi
nin
Parameters to the Control and the PLC Pro
ram
6
03.96
6.9 Axes and spindles
6-120
Siemens AG 2000 All Rights Reserved
SINUMERIK 840D Installation and Start-Up Guide (IAD) – 04.00 Edition
The following table lists all the data you need to enter for linear measuring
systems.
Table 6-12 Machine data for encoder matching with linear measuring systems
Machine data
Linear axis
MD 30300: IS_ROT_AX 0
MD 31000: ENC_IS_LINEAR 0
MD 31030: LEADSCREW_PITCH mm/rev
MD 31040: ENC_IS_DIRECT Encoder mounted on motor: 0
Encoder mounted on machine: 1
MD 31010: ENC_GRID_POINT_DIST Scale graduations
MD 32110: ENC_FEEDBACK_POL Actual value sign (feedback
polarity)
[1; -1]
MD 31060: DRIVE_AX_RATIO_NUMERA Motor revolution
MD 31050: DRIVE_AX_RATIO_DENOM Spindle revolution
M
IS_ROT_AX=0
Leadscrew
Load gearing
Table
Linear scale
ENC_IS_LINEAR=1
ENC_IS_DIRECT=1
ENC_GRID_POINT_DIST (for linear encoder)
ENC_FEEDBACK_POL= [1 or -1]
DRIVE_AX_RATIO_NUMERA No. of motor rev.
DRIVE_AX_RATIO_DENOM
=
No. of spindle rev.
LEADSCREW_PITCH
Fig. 6-13 Linear axis with linear scale
Matching encoders
with linear
measuring
systems
Linear axis with
linear scale
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