Symptom
Machine moves reverse
direction when homing.
Router head does not
stop after contacting tool
touch-off puck.
Machine will not move
after controller receives
commands.
Machine moves to new
position satisfactorily, but
does not return correctly
to original position.
Abnormal operation when
processing.
After controller powers
on, one or more axes
move only one direction.
After controller powers
on, axis motor will not
move.
Possible Cause
Origin detection plate beyond reach of
detection switch.
Origin detection switch wire is loose or
damaged.
Origin detection switch damaged.
Interface board is broken.
50-pin data cable is broken.
Faulty
connection
between
detection switch and interface board.
Origin detection switch damaged.
Electrical interference causing false
signal that limit switch has been
triggered.
Interface board is broken.
50-pin data cable is broken.
Poor connection of "Cutter" signal line
to "cutter" terminal.
Poor connection of spindle with "GND"
terminal on interface board.
One axis not moving – may be poor
connection.
All axes not moving.
Mechanical elements, such as ball
screws, are loose or misadjusted.
Program/drawing file is faulty.
Electrical interference.
Improper connection between interface
board and motor drive.
Interface board damaged.
Motor driver damaged.
Pulse line and direction line are
switched.
5V common anode end of motor driver
is disconnected.
Motor driver damaged.
No pulse signal output, interface board
chip damaged.
Correction *
Inspect and adjust.
Check connections.
Replace.
Repair or replace.
Replace date line.
origin
Refresh line to determine if wiring is correct.
Replace.
Recalibrate circuit.
Repair or replace.
Replace data line.
Restore proper connection.
Restore proper connection.
Connect a different axis connection to this
terminal to test. If it works, motor driver is
okay.
Check 50-pin cable connection to interface
board. If machine still won't move, determine
corresponding drive and motor.
First, check 50-pin cable connection to
interface board. Then check power supply of
motor
drivers.
elements of axis system.
Inspect and correct as needed.
Review program and reload to system.
Inspect connections; separate strong and
weak electrical current; separate "GND" of
inverter from the other components.
Inspect connections.
Replace interface board.
Replace driver.
Rewire pulse and direction lines.
Check connection.
Replace driver.
Replace chip.
31
Last
check
mechanical