Siemens SINUMERIK 840DiE sl Manual page 323

01/2007
Linear measuring
system
Linear axis with
linear scale
Machine data
Table 11-21 Linear measuring systems: Machine data
Number
Axis–specific ($MA_ ... )
30240 ENC_TYPE[n]
30242 ENC_IS_INDEPENDENT[n]
30300 IS_ROT_AX
31000 ENC_IS_LINEAR[n]
31010 ENC_GRID_POINT_DIST[n]
31030 LEADSCREW_PITCH
31040 ENC_IS_DIRECT[n]
31050 DRIVE_AX_RATIO_DENOM[n]
31060 DRIVE_AX_RATIO_NUMERA[n]
32110 ENC_FEEDBACK_POL[n]
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
The diagrams below show the general possibilities of arranging a rotary incre-
mental measuring system with regard to motor and load, as well as the resulting
values for the respective machine data.
DRIVE_AX_RATIO_NUMERA
DRIVE_AX_RATIO_DENOM
M Í Í Í Í Í Í
Load gearbox
Fig. 11-9 Linear axis with linear scale
Identifier
Actual–value acquisition modes
1 = incremental signal generator
Encoder is independent
Rotary axis
Direct measuring system (linear scale)
Distance between reference marks on linear
scales
Leadscrew pitch
Encoder is connected directly to the machine
Denominator load gearbox
Numerator load gearbox
Sign actual value (feedback polarity)
11 NCK Commissioning with HMI Advanced
11.5 Axes and spindles
motor revs
=
spindle revs
IS_ROT_AX=0
Table
Ball screw
Linear scale
ENC_IS_LINEAR=1
ENC_IS_DIRECT=1
ENC_GRID_POINT_DIST
ENC_FEEDBACK_POL= [1 or –1]
Name/remarks
LEADSCREW_PITCH
Refer-
ence
R2
11-323