3025 Index table clutch slipped.
Sheet 4 plug 2 pin-S
This error is detected through a loss of 24 volts on wire number 418 from the index table clutch gear proximity switch to the control. If the index table clutch has obviously slipped refer to paragraph (g). If the index table wasn't programmed to rotate when the error displayed continue with paragraph (a).

a) Using a voltmeter check for 24 volts at terminals 400 and 418 and zero volts or ground on terminal 419 at TB18, situated beneath a cover on the left-hand side of the Z axis carriage. Check the same terminals in TB19 situated at the front of the Z axis bed. If the results differ then the Z axis cable loom is broken, and the carriage should be removed to replace it. If 24 volts isn't present the indicator-fuse 4 in the power distribution panel is probably faulty.

b) If there is 24 volts at terminal 400 but not at terminal 418 then either the error is true or the proximity switch for the index table clutch gear is faulty; go to paragraph (f)

c) If there is 24 volts at both 400 and 418 the fault lies from terminal 418 through to Plug 2, Pin-S and the 'Digital Input' board in the control; refer to paragraph (d). 

d) Switch-off the control and transpose the 'DI' boards situated in the lower rack to the left. Power-up the machine. If the fault disappears, or a different, unrelated error code shows-up, then the 'DI' board is faulty and a replacement is required. 

e) If the same error code persists switch-off the machine, remove plug 2 and check the continuity from pin-S to terminal 418 in TB19. If wire 418 appears to be broken there may be a spare wire in the cable loom to substitute. If the wiring is O.K. the fault may be with the 'Watchdog' board (WD 50x) in the control or corruption of the memory. If another control is available the 'Watchdog' boards can be exchanged to test. If the memory is to be reloaded remember to punch-out programme and tool information first (although an up to date back-up tape should always be held).

f) Fit a link wire between terminals 400 and 418 and power-up the machine. If the 3025 alarm persists switch off the machine, remove the link wire and refer to paragraph (d). If the machine powers-up without an alarm, switch off and remove the link wire. Gain access to the index clutch gear by removing the cover on the top of the Z axis carriage. Note if the gear has slipped by the position of the timing marks engraved on the gear and shaft. Remove the gear and place a ferrous object over the end of the proximity switch; power-up the machine. If the alarm returns on powering-up the machine then the switch is faulty and needs replacing. If the machine powers-up without an alarm the gap between the switch and the gear was too large; adjust the switch to give a 2mm gap when the gear is tightened down.

g) If the clutch gear has slipped because of a collision or otherwise, gain access to the index clutch gear by removing the cover on the top of the Z axis carriage. Note if the gear has slipped by the position of the timing marks engraved on the gear and shaft. Remove the gear and check the condition of the drive pin through the shaft; replace the pin if there is any sign of wear. Re-assemble the gear aligning the timing marks.