41/46
Error
Possible causes
Solution
No measuring signal
No power at the scanning head
• Check the status of the
evaluation electronics
• Check the connection
assignment between the
encoder and the evaluation
electronics
Error message from the evaluation
electronics
Following error due to temporary
failure of the measuring signal
• Check the assignment of the
scale tape to the scanning head
• p�r�n� readjust mechanically
• Readjust electronically with
ADJUSTMENT TOOL*
Rough, loud motor running
(for linear motors)
Irregular edge separations of the
counting signals due to interpolation
errors
Counting error
(compared to a standard)
Mounting error
No reference signal
Mounting error (results in faulty
gating of the reference signal and
counting signal)
Reference mark can only be
detected from one direction
Reference mark appears twice
Not all reference marks are
detected
Failure signal reports
(for RS 422)
Mounting error (results in level of
the analog signal from the sensor
being too low)
Contamination on the scale tape
(results in level of the analog signal
from the sensor being too low)
Clean the scale tape
Encoder function operating error
Contact the technical support of
NUMERIK JENA
8. TROUBLESHOOTING
The functions of all scanning heads and accuracy of all scale tapes are tested before the
encoders are shipped� However, if troubles or problems should occur, please read the following
points in the chart and proceed according these information�
If this is not helpful, please contact the technical support of NUMERIK JENA GmbH or one of
our authorized representations. You will find respective contact data on the NUMERIK JENA
GmbH website www�numerikjena�de�
* see also chapter 6 - Signal adjustment
Chart 10
