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TB025 Rev1 M15 5 Servo Troubleshooting
CHECK the Fault Indicator LED's normally all are lit
if out
Onboard S M P S problems Poss bad Servo Drive
if out with USV
Check E STOP loop Goto Step 5
if out with USV and UV Check Fibers Goto Step 4
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ALL Red LED's should be lit until you jog any axis then go out If no goto note 2
To free axis again @ MDI
type M93
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1 Check the Status LEDs
See above
2 Eliminate Power Box
With the power off on the main power cable coming out of the power box jumper a
wire across pins 6 and 2 see Diagram 1 Turn the power on and press the red reset button With a multi
meter test between pin 3 ground
and pin 5 110 Vdc
If voltage is missing go to step 7b If present
continue
3 Defeat the limit switches
on the Servo drive by removing the limit switch connector and lifting the limit
switch defeater switches to the ON position If no continue
4 Check Fibers
Check for breaks and tight radius bends Verify fibers are connected snug to the circuit
board by snapping them into their sockets Each fiber has a blue end and a gray end check for missing
signals by observing red light at the blue end of each fiber See Diagram 2! If missing see note 1 If not
continue
5 Check for missing DC
+ voltage on pins 9 & 10 on the Servo Drive card you should measure 80 150
Vdc Ideally 110 Vdc If voltage present replace Drive If no continue
6 Reset Spindle OCR4
Non Inverter units and E Stop Switch Test If no continue
7 Isolate Servo E Stop Loop
    1 With power off Jumper across pin 7 and pin 8 on the Servo Drive and release the E Stop With a
continuity meter confirm continuity of the E stop loop within the console at pins 6 and 2 of the main power
cable If no determine where the open in E Stop loop is If yes continue
    2 Using Diagram 4 and a continuity meter find any faulty components or connections that is causing an open
in the E Stop loop Repair or replace as necessary
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Still Stumped? Send us these results
1 LED Status lights fill in the LED's that were NOT LIT
Drive type 1
Drive type 2
Legend
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OC Over Current
OT Over Temp
DF Drive Fault
USV Under Switcher Voltage
UV Under Voltage
OV Over Voltage
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Notes
1 Improper Estop action or no RED light
at the fibers means the Controls software is NOT talking to the
PLC and should be checked Confirm "Absent" is not selected on the Control setup screen under "PLC Type"
F1 Setup; F3 Config; F1 Control
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2 If no LED's are lit
check for Logic Power from the TOKO supply mounted in the console Check
connections output voltages wires
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If these procedures were followed Power up the control and test again If problem is still not solved then call
Tech Support with the results of these tests please have your serial # ready
Pull here to remove!!
Do NOT pull on the cable
Document History
Rev1 Created on 2000 01 06