6 – 58 HEIDENHAIN Service Manual iTNC 530 HSCI
6.4 Sequence for finding errors in the control loop
In the event of error messages related to movement, acceleration or standstill, for example:
Positioning error
Excessive servo lag
Nominal speed value too high
Movement monitoring
Standstill monitoring
or if there are problems such as:
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 HSCI is a handy tool for analyzing errors in the control loop.
Activation and operation --> See ”Integrated oscilloscope” on page 10 – 95.
See also:
”Finding position differences of direct and indirect encoders” on page 6 – 67
”Error localization by switching from direct to indirect position measurement” on page 6 – 69
If you need information on lubrication, mechanics, hydraulics, pneumatics, brakes, coupling
system, please contact your machine manufacturer!
Error message Recommended signals Additional signals
Positioning error s diff I (noml), I2-t (mot.), I2-t (p.m.),
Utilization
Excessive servo lag s diff I (noml), I2-t (mot.), I2-t (p.m.),
Utilization
Nominal speed value too
high
v noml, v (n noml),
v actl, v (n actl)
I (noml), I2-t (mot.), I2-t (p.m.),
Utilization
Movement monitoring v noml, v (n noml),
v actl, v (n actl),
pos. diff.
I (noml), I2-t (mot.), I2-t (p.m.),
Utilization
Standstill monitoring s diff, s actl I (noml), I2-t (mot.), I2-t (p.m.),
Utilization
The torque-determining current I noml 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 (p.m.) and Utilization are calculated from the current.
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