Southbend sb1039 owner manual Correcting Phase Polarity Wiring, Wiring Overview

14" TURN-X®Toolroom Lathe E L E C T R I C A L For Machines Mfg. Since 5/11

Correcting Phase Polarity Wiring

This sub-section is only provided for troubleshooting. If you discover during the test run that the lathe will not operate, or that the spindle runs backwards, the lathe may be wired out of phase. Without the proper test equipment to determine the phase of power source legs, wiring machinery to 3-phase power may require trial-and-error. Correcting this is simply a matter of reversing the positions where two of the incoming power source wires are connected.

To correct wiring that is out of phase:

1.Push the STOP button, turn the master power switch to OFF, and disconnect the machine from power.

2.Open the electrical box and swap any two hot wires coming from the plug, as illustrated in Figure 138.

	To Plug		Ground
Swap any two			Gn
of these wires	Hot	Hot	Hot

3 5 1

MASTER

POWER SWITCH

4 6 2

L1 L2 L3

Figure 138. Swapping L1 and L2 power connections

to correct out-of-phase wiring.

3.Close and latch the electrical box, and reconnect the machine to the power source.

Wiring Overview

Chuck Guard

Safety Switch

Page 95

Brake Pedal

Safety Switch

Page 95

End Gear Cover

Safety Switch

Page 95

Spindle Motor

Page 92

Power Supply

Connection

ElectricalPage 95

Cabinet

Page 90

Work Lamp

Page 95

Spindle

Switches

Page 94

Coolant

Pump Motor

Page 92

Control Panel

Page 94

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