Tormach PCNC 770 - Details of Control Power Subsystem

Chapter 10
187
UM10350_PCNC770_Manual_0916A
Troubleshooting
10.5.2.1 Details of Control Power Subsystem
The control power circuit is that circuit which is powered on when in a ready to run state, and which
powers o when the red E-stop is in the depressed posion. The circuit does not power on unl the
red E-stop is released and the green Start buon is momentarily depressed. When control power is
o, the mill is in an o state, however some components in the electrical cabinet are sll powered
on including the main fuses FU1, FU3 and FU6, and wires 102 and 103 on the red E-stop and green
Start buon. In addion, the following wires have voltage present even if the mill is in the O state:
• Wire 140 going to the C2 contactor
• Wire 129 going to the C1 contactor
• Main control board and switches for coolant (SW5) and controller power (SW6)
• Depending on the posion of SW5 and SW6, there could be voltage at the power outlets
mounted to the boom of the electrical cabinet on wires 122 and 124
Figure 10.10