242 HEIDENHAIN Technical Manual MANUALplus 620
3.20 Encoder Connections
3.20.1 General information
HEIDENHAIN contouring controls are designed for use with incremental or
absolute linear and angular encoders as measuring systems. The encoder sig-
nals are subdivided 1024-fold.
Encoders with one reference mark or distance-coded reference marks and
with EnDat interface are permissible.
HEIDENHAIN recommends the use of absolute encoders with EnDat interface
or the use of encoders with distance-coded reference marks because they
greatly reduce the traverse distance required to establish the absolute posi-
tion.
Please use only HEIDENHAIN encoder cables, connectors and couplings. For
maximum cable lengths, see "Cable Overview" at the end of this chapter.
Example:
f = 350 kHz; n = 10 000 min
–1
On controller units with HSCI interface (e.g. CC 61xx, UEC 11x) you can no
longer directly connect encoders with 11 µA signals. You need an adapter
ID 313 119-xx to adjust the signals; see "Adapters for Encoder Signals" on
page 250.
Position encoder Speed encoder
Signal amplitude EnDat, 1 V
PP
(to be
defined in
MP_posEncoderSignal)
EnDat, 1 V
PP
Input frequency 1 V
PP
CC 61xx:
27 kHz/400 kHz (to be
defined in
MP_posEncoderFreq)
CC 61xx: 400 kHz
Keep in mind the line count of the speed encoders when choosing the
motors:
x: line count of the speed encoder
f: maximum input frequency
n: maximum speed
x
f601000⋅⋅
n
------------------------------ -=
x
350 60 1000⋅⋅
10000
-------------------------------------- -
2048≈=
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