HEIDENHAIN ITNC 530 - Sequence for Finding Errors in the Control Loop

6 – 62 HEIDENHAIN Service Manual iTNC 530
6.4 Sequence for Finding Errors in the Control Loop
In the event of error messages regarding movement, acceleration or standstill, for example:
 Positioning error
 Excessive servo lag
 Nominal speed value too high
 Movement monitoring
 Standstill monitoring
or in case of errors, for example:
 Poor workpiece quality
 Unusual noise during axis movements
 Unusual vibrations
... you can check the machine components in a defined order to find the fault. --> See flowchart
in this chapter.
Integrated
oscilloscope
The integrated oscilloscope for iTNC 530 is a handy tool for analyzing errors in the control loop.
Activation and operation --> See “Integrated Oscilloscope” on page 10 – 99.
See also:
 “Finding Position Differences of Direct and Indirect Encoder” on page 6 – 68
 “Error Localization by Switching from Direct to Indirect Position Measurement” on page 6 –
70
Note
If you need information on lubrication, mechanics, hydraulics, pneumatics, brakes, coupling
system, please contact your machine manufacturer!
Error message Recommended
signals
Additional signal
Positioning error s diff I (nominal), I2-t (mot.), I2-t
(p.m.), Utilization
Excessive servo lag s diff I (nominal), I2-t (mot.) I2-t
(p.m.), Utilization
Nominal speed value too
high
v nominal, v (nom
rpm), v actual,
v (act rpm)
I (nominal), I2-t (mot.) I2-t
(p.m.), Utilization
Movement monitoring v nominal, v (nom
rpm), v actual,
v (act rpm),
Pos. diff.
I (nominal), I2-t (mot.) I2-t
(p.m.), Utilization
Standstill monitoring s diff I (nominal), I2-t (mot.) I2-t
(p.m.), Utilization
Note
The torque-determining current I nominal in particular is an important characteristic for the
mechanics of the axis concerned (stiffness, blunt tool, lubrication, utilization, etc.)
Other signals, such as I2-t (mot.), I2-t (Lt.) und Utilization are calculated from the
current.