01/2007
11.5 Axes and spindles
11-324
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
11.5.6 Parameterization of absolute measuring systems
The following encoder types are currently supported:
S Single–turn absolute value encoder
S Multi–turn absolute value encoder
with EnDat protocol and incremental sinusoidal encoder signals A and B, e.g.
Haidenhain EQN 1325.
The absolute value encoder EQN 1325 from Heidenhain has the following properties:
S EnDat protocol
S PPR count: 2048 = 2
11
(encoder fine resolution)
S Positions/revolution: 8192 (13 bits)
S Differentiable revolutions: 4096 (12 bits)
S Encoder signals A/B: 1Vpp sin/cos
Synchronization of the measuring system with the machine positions is per-
formed by calibration of the absolute value encoder in absolute measuring sys-
tems. For calibration of the absolute value encoder, see Section 11.5.19, Page
11-362.
An absolute encoder can currently exclusively be used as a motor encoder (in-
direct measuring system).
M
IS_ROT_AX=0
Table
G
DRIVE_AX_RATIO_NUMERA
DRIVE_AX_RATIO_DENOM
LEADSCREW_PITCH
n
Encoders
Measuring
gearbox
n
motor
Load
gearbox
n
Spindle
Ball screw
DRIVE_ENC_RATIO_NUMERA
DRIVE_ENC_RATIO_DENOM
encoder revs
motor revs
=
spindle revs
motor revs
=
ENC_IS_LINEAR=0
ENC_IS_DIRECT=0
ENC_TYPE=4
ENC_ABS_TURNS_MODULO=4096
ENC_REFP_MODE=2
Fig. 11-10 Linear axis with absolute value encoder on motor
M
IS_ROT_AX=1
DRIVE_ENC_RATIO_NUMERA
DRIVE_ENC_RATIO_DENOM
DRIVE_AX_RATIO_NUMERA
DRIVE_AX_RATIO_DENOM
LG
n
Encoders
Rotary table
Load
gear
n
motor
Measuring
gear
n
Load
ENC_IS_LINEAR=0
ENC_IS_DIRECT=0
encoder revs
motor revs
=
load revs
motor revs
=
ENC_TYPE=4
ENC_ABS_TURNS_MODULO=4096
ENC_REFP_MODE=2
Fig. 11-11 Rotary axis with absolute value encoder on motor
Encoder types
EQN 1325
Calibration
Rotary measuring
systems
Linear axis with
rotary absolute
encoder
Rotary axis with
absolute value
encoder on motor
11 NCK Commissionin
with HMI Advanced
To Next Page
Loading...
