1109 Spindle Start Creep speed detector
Sheet 4 plug 2 pin-k
This error indicates a 24 volt signal from the 'creep speed detector' relay present at the control interface when there should be zero volts. It should only occur if the spindle fails to rotate when an M03 or M04 spindle start is requested.
a) Monitor the voltage at rotary switch position 19 on the 'Shackleton Drive Diagnostic Unit', If the unit isn't connected - switch-off the machine at the main isolator and plug the ribbon-cable connector onto the board in the 'Master Stack' (lower of the two) with the cable entry towards the diagnostic unit. A digital voltmeter can be plugged into the auxiliary sockets of the diagnostic unit for accurate voltage measurement. Re-apply power to the machine. If the machine shuts-down with a 1109 error the fault is likely to be a control fault, refer to paragraph (d). If the machine powers-up without errors, manually programme M19, while monitoring the voltage at test point 19. The voltage should be around zero until the spindle starts to rotate and then increase to >150mV. If the spindle doesn't rotate, or turns very slowly and the monitored voltage doesn't exceed about 100mV, the 'speed loop zero' pot on the '3 phase control board' in the master stack of the Shackleton drive unit may need slight clockwise adjustment. Follow the procedure for the spindle drive set-up in the 'Commissioning and Service Manual'. If a 0109 error displays and the correct voltage is measured continue with paragraph (b).
b) The fault is related to the 'Zero Speed Detector' board in the Shackleton auxiliary detector rack, board number 3. Either potentiometer 3 is set too high, the SCR relay is faulty, or there's a fault on the board. Re-apply power to the machine and programme S200 and M03. If no error is displayed refer to paragraph (c). An 1109 error would suggest a faulty board or relay; if another Shackleton Drive Unit is available, of the same type, the boards can be exchanged to test. If no replacement board is available, switch-off the machine at the isolator and transpose boards 3 and 4 in the auxiliary detector rack. Re-apply power to the machine and again programme S200 and M03. If a 3017 or 3018 is then displayed, the board originally in position 3 is faulty and will need repair or replacement. If the 1109 error returns, the SCR relay is suspect - this can be exchanged with one of the other relays in the 'Power Distribution Panel' to test.
c) No error displayed while the spindle is running at 200 RPM indicates that pot. 3 requires adjustment: stop the spindle and switch-off the machine at the isolator. Disconnect the diagnostic unit from the 'Master Stack' and plug it into the creep speed detector board (3rd board from the left). Power-up the machine. Monitor test position 11 of the diagnostic unit and adjust 'Creep Speed Pot 3' until the reference voltage reads 210mV, then programme S10 and M03. Monitor test position 13 of the diagnostic unit while adjusting the 'Spindle Override' switch. Set the spindle speed to correspond with a voltage of about 220mV. The relay on board 3 and the SCR relay should then be open. Reducing the spindle speed should close the relays.
d) Switch-off the control and transpose the 'DI' boards situated in the lower rack to the left. Power-up the machine and retry; if a different, unrelated error displays the 'DI' board is faulty and will need replacing. If the same 1109 error returns 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).