Option "c" · Chapter 7: Fault finding
17
CHAPTER 7 - FAULT FINDING
1 - POSITION FAULT
Check that the limit switches
FC+
and
FC-
are not activated.
Increase the value of the
Following Error
parameter in the
Indexer / Electronic Gearbox
menu
accessible via the
Advanced Function
module.
Check that the motor speed does not reach the maximum speed defined by the
Maximum
Speed
parameter of the
Analogue Input
module. Otherwise, increase the maximum motor
speed defined by the
Maximum Speed
parameter or reduce the speed input command emitted
by the indexer board.
Check that the current input command
I
DC
does not reach the maximum value defined in the
Maximum current
parameter of the
Current
module. Otherwise, increase the
Maximum Current
parameter or increase the acceleration and deceleration times in the indexer board.
2 - OPERATING PROBLEMS
2.1 - L
OUD CRACKLING NOISE IN THE MOTOR AT STANDSTILL
Check that the Motor-Amplifier-Controller ground connections answer the requirements i n
Chapter 4.
Check that the wiring of the incremental position input command answers the requirements in
Chapter 4.
2.2 - L
OUD NOISE IN THE MOTOR AT STANDSTILL AND WHEN RUNNING
Check for the rigidity of the mechanical coupling between motor and load (backlashes and
elasticities in the gearboxes and couplings).
Execute the
AUTO-TUNING
function again by selecting a lower bandwidth (
Medium
or
Low
).
If the problem remains, renew the
AUTO-TUNING
procedure by activating the antiresonance
filter (
Filter
=
Antiresonance
). The antiresonance filter is accessible from the
BPCW
software
version
2.6
and the amplifier EPROM version
5.7
.
2.3 - L
OUD NOISE IN THE MOTOR WHEN RUNNING
Select a higher position resolution on the motor (
Encoder resolution
) according to the
maximum rotation speed (see chart of Chapter 5, paragraph 2) and to the indexer maximum
frequency (Chapter 6, paragraph 3).
Reduce the anticipation gain (
Feedforward position gain
) and readjust the triggering threshold
of the following error (
Following error
).
2.4 - M
OTOR POSITION OSCILLATIONS AT STANDSTILL
Check for the rigidity of the mechanical coupling between motor and load (backlashes and
elasticities in the gearboxes and couplings).
Increase the value of the
Motor Dead band
parameter in the
Indexer / Electronic Gearbox
menu accessible via
Advanced Functions
.
