We have a TSUGAMI SX26 BS26B with a FANUC LA1 ... broke a belt on axis T1 and the axis fell to the bottom ... replaced the belt and now trying to work through the 5.12.1 "Procedure for setting the zero points of the T1, etc. axis" on page 5-20 of the Instruction Manual but get to STEP 6 which says to press the JOG - button until the axis stops ... that's where the axis falls to the bottom as fast as gravity will take it !!!
Strange thing is ... STEP 4 says to "set "1" in bit 4 of MAIN DGN No.544" but this bit is already set to "1" and only when I set it to "0" will the axis not do the gravity drop to the bottom but slowly passes the index mark lignup until the axis evidently overtravels with "441 Servo Alarm: 4 Axis Excess Err"
To move up off the bottom I have to jump down to STEP 8 and "Set ZRN on the general-purpose operator's panel of the MAIN screen display to "OFF""
I'm sure some of you chaps out there have run across this problem and maybe laughing by now so I appreciate your time to throw me a bone or two!