HEIDENHAIN iTNC 530 HSCI Service Manual

February 2012 19 – 281
19.1.4 Possible error causes
 Contamination of the position encoder
 Chips inside the scale housing
 Damage to the position encoder
 Scanning head misaligned (parallelism, distance, etc.)
 Roller bearing in scanning head defective
 Cable damaged
 Signal error caused by high frequency, strong magnetic fields, etc.
 Penetration of humidity
 Short circuit in cable or scanning head
 Light unit defective (LED)
 Strong machine vibrations
 Defective position encoder interface on CC 61xx or UEC 11x
19.1.5 Troubleshooting
To find out, whether the connected encoder or the encoder interface of the control component is
defective, the interchange method can be used.
Exchange
constellations
Attention
The amplitude of the reference marks is not monitored!
For example, if a reference mark cannot be evaluated due to contamination, with distance-coded
encoders a corresponding error message (e.g., Reference marks <AXIS>: Incorrect spacing)
is generated.
With encoders with one reference mark, an error message is not generated immediately.
The reference run is continued until, e.g., the axis hits a limit switch.
Note
Encoder error messages are mostly due to the encoders / scanning heads / cables. In rare cases,
the reason is a defective interface of a CC or UEC.
The interchange method is quite complex here, as in addition to the position encoder inputs, you
also have to swap the speed encoder inputs and the PWM outputs or motor outputs, and you must
adapt the parameter settings.
Checking the suspicious position encoder with a PWM 9 or a PWT 18 may be more
effective. --> See ”Further examination of position and speed encoders” on page 19 – 314.
CC 61xx
Exchange constellations Flowchart
Swapping two single-speed axes or two double-speed axes Swapping axes on a CC 61xx
Swapping single-speed axis <--> single-speed spindle or
double-speed axis <--> double-speed spindle
Swapping axis and spindle on
a CC 61xx
UEC 11x
Exchange constellations Flowchart
Swapping two single-speed axes or two double-speed axes with
the same rated current
Swapping axes with the same
rated current on a UEC 11x
Swapping two single-speed axes or two double-speed axes with
different rated currents
Swapping axes with different
rated current on a UEC 11x
Swapping single-speed axis <--> single-speed spindle or
double-speed axis <--> double-speed spindle
Swapping axis and spindle on
a UEC 11x

HEIDENHAIN iTNC 530 HSCI Specifications

General

Brand	HEIDENHAIN
Model	iTNC 530 HSCI
Category	Control Systems
Language	English