Tormach 1500MX - Servo Drive Subsystem; All Axes Wont Move When Commanded; One Axis Wont Move (or Only Moves in One Direction), and Other Axes Move

11: TROUBLESHOOTING
©Tormach® 2024
Specifications subject to change without notice.
Page 217 UM10811: 1500MX Operator's Manual (Version 0424A)
For the most recent version, see tormach.com/support
11.8 SERVO DRIVE SUBSYSTEM
The servo drives provide power and control to the X-, Y-, Z-, and A-axis motors as well as the spindle motor. The servo drives communicate
with PathPilot via the EtherCAT fieldbus connection. Each servo drive also handles a dedicated group of IO connections.
To troubleshoot the axes drive subsystem, read the following:
11.8.1 All Axes Won't Move When Commanded 217
11.8.2 One Axis Won't Move (or Only Moves in One Direction), and Other Axes Move 217
11.8.3 Axis Movement is Noisy 218
11.8.4 Lost Motion on Axis Travel 219
11.8.1 All Axes Won't Move When Commanded
Cause: Control signals aren't reaching the servo motors.
Probability How-To Steps Need More?
High
1. Power off the machine (see Power Off the Machine).
2. Examine the connections at the machine control board and the servo
motors. Verify that the connectors are firmly seated, and examine the
connectors for loose wires or ferrules.
Examine the cable 424/425/426 from
the control board (J13/J14/J15) to the
servo motors.
Cause: The DC-BUS board is malfunctioning.
Probability How-To Steps Need More?
Medium The loss of DC-BUS board power to one or more axes is likely if the servo motor
LEDs are not on, if they're dim, or if they're displaying a green 3 blink or 3-4
yellow blink error code.
Verify 68 Vdc on motor power wires (210/211, 220/221, 230/231).
Examine the axis status LED on the back of the servo motor.
For information, see "There's a blown
fuse on the DC-BUSboard" in "One
Axis Won't Move (or Only Moves in
One Direction), and Other Axes Move"
(below).
Cause: PathPilot isn’t commanding the move, or there's a controller problem.
Probability How-To Steps
Low
1. Jog the axes and, from the PathPilot interface, examine the value displayed in their DRO fields. If the position
doesn't change while you're jogging, there's a problem with the controller.
2. Select the Main tab, then, on the keyboard, select the Esc key.
3. Try to jog the axes again, and examine the value displayed in their DROfields.
4. If the problem persists, restart the controller.
11.8.2 One Axis Won't Move (or Only Moves in One Direction), and Other Axes Move
Cause: There's a loose axis motor coupling.
Probability How-To Steps
Low
l Jog the axis and listen to determine if you can hear the motor run.
l Examine the coupling and make witness marks to determine if the motor's turning but the screw isn't.