SCAL E PROBLEMS CAN SHOW UP AS SCALE ERRORS (AN ERROR CODE), MISPOSITIONING, REPEATABILITY PROBLEMS, ROUNDNESS PROBL EMS OR UNEXPECTED POSITION SHIFTS.
10-20-95
IS IT AN ERROR MESSAGE? 22. 1
DIFFICULT TO DIAGNOSE PROBLEMS CAN OCCUR IF MACHINE IS NOT PROPERLY GROUNDED. THERE MUST BE A CONTINUOUS GROUNDING CONDUCTOR (AS SPECIFIED ON THE GROUNDING LABEL IN THE MACHINE'S DISCONNECT BOX) FROM THE VMC'S GROUND BUS TO THE GROUND BUS IN THE BUILDING'S POWER DISTRIBUTION PANEL.
CO NSULT CHART 18 ERROR CO DES
YES
22.1.1
NO
SCALE ERROR MESSAGE? (AND LED IN SCALE BOX LIT)
YES
22. 2
WILL SCALE BOARD RESET? 22. 2.1
YES, AND ERROR IS NO T EASILY RECREATED
CO NNECT SCALE ENCODER TESTER (ST40) BETWEEN SCALE BOX AND AXIS CARD
NO, OR 22.2.2 ERROR REOCCURS EASILY
NO SWITCH EXE BOARDS IN SCALE BOX 22.2.1a EXE ERROR STAYS W ITH BOARD EXE BOARD OR SCALE? 22. 2.1b
REPLACE EXE BOARD 22.2.1b.1
SCALE
CONTINUED ON PAGE 2 COLUMN 2 OF CHART 22 22.2.1c
IS IT A POSITI ONING PROBLEM? 22. 3
NO
YES
DO ES PROBLEM G O AWAY WITH NO SCALES?
POWER OF F MACHINE. DI SCONNECT SCALE FROM 1010 CARD. PO WER ON MACHINE.
YES
22.3.2
22.3.1 SURVEY FOR SCAL ES IS NOT THE SAME AS SURVEY FOR RESOLVER. FOR POSITIONING TO BE CORRECT, SURVEY FOR RESOLVER MUST BE ENTERED WHEN SCALES ARE UNPLUGGED AND SURVEY FOR SCALES MUST BE ENTERED WHEN SCALES ARE RECONNECTED. SURVEY FOR SCAL ES AND SURVEY FOR RESOL VER CAN BE FOUND IN MACHINE RECORDS.
NO
RECONNECT SCALES ALSO J13 ON 1 060 (SCALE ERROR LINE) MUST BE PLUGGED IN)
AXIS CO LD STARTS TO CORRECT POSITION? 22.3.4
22. 3.3
22. 3.2a
22. 3.5
IF Y-AXIS, THE SCALE MOUNTING MAY BE DEF LECTED BY SCALE CABLE 22.3.4a VERIFY SCALE CABLING IS CORRECT AND PLUGGED INTO CO RRECT INPUT OF 1010 CARD (J6)
CO NTINUED ON PAGE 2 CO LUMN 1 OF CHART 22
22.3.4b VERIFY THAT SURVEY IS CORRECT FOR SCALE
22.4
ZERO OFF SET IN SV F OR AXI S MAY BE SET WRO NG
YES
REMEMBER TO RE-ENTER THE SURVEY FOR SCAL ES.
NOT A SCALE PROBLEM. GO T O CHART 21 POSITIONING PROBLEMS
NO
RUN AN EXTERNAL CABLE TO THE SCALES 22.3.6 USE SCALE T ESTER (1710-0) OR ENCODER TESTER (ST40) AND CHECK FOR INDEX FROM SCALES 22.3.7
SURVEY FOR SCALES IS NOT THE SAME AS SURVEY FOR RESOLVER FEEDBACK.
22.3.4c CO NTINUED ON PAGE 2 CO LUMN 5 OF CHART 22 22.3.4d
Figure 16-35 Scale Problems
March 2003
Section 16: Troubleshooting
585
Fadal
Maintenance Manual
CHART 22 conti nued (page SCALE PROBLEMS
CONTINUED FROM PAGE 1 CO LUMN 2 OF CHART 22
CO NTINUED FROM PAGE 1 CO LUMN 1 OF CHART 22
CO NTINUED FROM PAGE 1 CO LUMN 5 OF CHART 22
2)
10-20-95
22A.3
22A.2
22A.1
CO NNECT SCALE ENCODER TESTER (ST40) BETW EEN SCALE BO X AND AXIS CARD
PO WER DOWN MACHINE AND DISCO NNECT SCALES F RO M AXIS CARDS
22A.3.1
22A.2.1
YES SCALE TESTER SHO WS ERROR?
PUT X SCALE CABLE INTO Y JACK O F SCALE BO X, ETC.
22A.3.2
PO WER ON MACHINE 22A.2.2
NO
SWAP A KNOW N GOOD CABLE BETWEEN SCALE BOX AND AXI S CARD AND RETEST 22A.3.2a
SWAP AXI S CARDS
ERROR STAYS W ITH EXE BOARD OR SCALE?
EXE BOARD
22A.2.3
22A.3.3
REPLACE 1580-1A BOARD (SCALE BOX MOT HERBOARD)
PROBLEM STAYS W ITH AXIS CARD? 22A.3.4
22A.2.3a
SCALE
YES
REPLACE AXIS CARD 22A.3.4a
NO CHECK GIBS AND STRAPS
SCALE CABL E MAY BE DAMAGED. RUN A NEW CABL E OUTSIDE O F MACHINE TO TEST .
22A.3.5 GO TO CHART 21 PO SIT IONING , CHART 5 REPEATABI LITY
22A.2.4
ERROR STI LL OCCURS? (LED LITES) 22A.2.5
YES
DISCONNECT READER HEAD FROM BRACKET AND INSTALL SHIPPING M OUNT S ON READER HEAD. MOVE HEAD BY HAND.
CHECK ALIGNMENT OF SCALE MOUNTI NG 22A.2.5a
NO
22A.2.5b
CABLE DAMAGED, REPLACE
22A.2.5c
22A..2.6
OVERSHO OTING?
22A.1.1
SCALE IS GOOD.
ERROR STI LL OCCURS NO WHEN SCALE M OVED BY HAND? (LED LITES)
RETURN BAD CABLE TO F ADAL FOR FAILURE ANALYSIS
YES
22A.3.6
22A.2.5c.1
YES
REPLACE SCALE
CO NSULT FACT ORY ABOUT AXIS SOF TWARE UPDATE
PROBLEM IS ALIG NMENT OF SCALE OR OF READER HEAD AND BRACKET
WHEN SCAL E IS REPLACED A NEW SURVEY MUST BE DONE.
22A.2.5d
22A.1.1a NO
CAVITATION OR VIBRATIO N?
YES
22A.1.2
DO ES IT GO AWAY WHEN SCALES ARE DISCONNECTED? 22A.1.2a
NO
CROSSOVER PROBLEM ? (BUMP AT QUADRANT S)
YES
CHECK ADJUSTMENT OF GIBS AND STRAPS
22A.1.2b
CHECK BACKLASH WIT H SCALES DISCONNECT ED. 22A.1.2c
BACKLASH >20? 22A.1.2d
YES
MECHANICAL BACKLASH MUST BE CO RRECTED. 22A.1.2e
NO
YES
CO NSULT FACT ORY 22A.1.3a
NO T A SCALE PROBLEM GO T O CHART 1 22A.1.2a. 1
22A.1.3
Figure 16-36 Scale Problems (Continued)
586
Section 16: Troubleshooting
March 2003
Troubleshooting Guide for Scale Issues in CNC Machines – Its Fadal Parts Diagnostic Manual
Fadal
Maintenance Manual
CHART 22 SCALE PROBLEMS
SCALE PROBLEMS
SCAL E PROBLEMS CAN SHOW UP AS SCALE ERRORS (AN ERROR CODE), MISPOSITIONING, REPEA...
