[humak16]

I have recently installed a 1981 Nakamora Tome Model:- TMC-4 CNC turning center. Although machine and control are very old yet condition is satisfactory. After switching on the control alarm 401 Servo appears on CRT. Red LED (OVC) on Z axis Velocity control unit card turns on. Hydraulic system does not turn on. Machine alarm LED on control panel also turns on.. It is a Fanuc 6T system fitted with following PCBs.
Mother Board:- A20B-0008-041 (0/050)
Velocity control unit:- A06B-6045-H005/H006
X- axis VCU card:- A20 B-0007-036 (0/06A)
Z-axis VCU card :- A20B-00040017 (1/100)
Please help to rectify the fault. I dont have Machine builders manuals. Can anyone share these manuals? How ever I have Fanuc Manuals.

[generaldisarray]

try to powerup with the motor disconnected

[Brunocnc28]

Hi
Strange that you have à Fanuc 6TB système with motors Modèle N ( all blacks)
Your axis contrôl card is défective if your axis is not locked.