12. 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 webside www.
numerikjena�de�
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
* see also chapter 8
Chart 8
48/58
KIT
L
-Series
