Axis Troubleshooting - Allen-Bradley Kinetix 5700 User Manual

Chapter 7 Troubleshoot the Kinetix 5700 Drive System

Axis Troubleshooting

Table 129 - Axis Troubleshooting
Condition Potential Cause
The position feedback device is incorrect or open.
Unintentionally in Torque mode.
Motor tuning limits are set too high.
Position loop gain or position controller accel/decel rate is improperly set.
Improper grounding or shielding techniques are causing noise to be
transmitted into the position feedback or velocity command lines, causing
Axis or system is unstable.
erratic axis movement.
Motor Select limit is incorrectly set (servo motor is not matched to axis
module).
Mechanical resonance.
Torque Limit limits are set too low.
Incorrect motor selected in configuration.
The system inertia is excessive.
You cannot obtain the motor
The system friction torque is excessive.
acceleration/deceleration that you
want.
Available current is insufficient to supply the correct accel/decel rate.
Acceleration limit is incorrect.
Velocity Limit limits are incorrect.
The motor is operating in the field-weakening range of operation.
The axis cannot be enabled until stopping time has expired.
The motor wiring is open.
The motor cable shield connection is improper.
The motor has malfunctioned.
Motor does not respond to a
command.
The coupling between motor and machine has broken (for example, the
motor moves, but the load/machine does not).
Primary operation mode is set incorrectly.
Velocity or torque limits are set incorrectly.
Brake connector not wired
Recommended grounding per installation instructions have not been
followed.
Presence of noise on command or
Line frequency can be present.
motor feedback signal wires.
Variable frequency can be velocity feedback ripple or a disturbance caused by
gear teeth or ballscrew, and so forth. The frequency can be a multiple of the
motor power transmission components or ballscrew speeds resulting in
velocity disturbance.
280
These conditions do not always result in a fault code, but can require
troubleshooting to improve servo drive performance. See the iTRAK System
User Manual, publication
Rockwell Automation Publication 2198-UM002G-EN-P - February 2019
2198T-UM001 for general iTRAK troubleshooting.
Possible Resolution
Check wiring.
Check to see what primary operation mode was programmed.
Run Tune in the Logix Designer application.
Run Tune in the Logix Designer application.
Check wiring and ground.
• Check setups.
• Run Tune in the Logix Designer application.
• Notch filter or output filter can be required (refer to Axis Properties dialog
box, Compliance tab in the Logix Designer application).
• Enable adaptive tuning. See Adaptive Tuning
filter information.
Verify that torque limits are set properly.
Select the correct motor and run Tune in the Logix Designer application again.
• Check motor size versus application need.
• Review servo system sizing.
Check motor size versus application need.
• Check motor size versus application need.
• Review servo system sizing.
Verify limit settings and correct them, as necessary.
Verify limit settings and correct them, as necessary.
Reduce the commanded acceleration or deceleration.
Disable the axis, wait the configured stopping time, and enable the axis.
Check the wiring.
• Check feedback connections.
• Check cable shield connections.
Repair or replace the motor.
Check and correct the mechanics.
Check to see what primary operation mode was programmed.
Check and properly set the limits.
Check brake wiring
• Verify grounding.
• Route wire away from noise sources.
• Refer to System Design for Control of Electrical Noise, publication
RM001.
• Verify grounding.
• Route wire away from noise sources.
• Decouple the motor for verification.
• Check and improve mechanical performance, for example, the gearbox or
ballscrew mechanism.
on page 445 for more notch
GMC-