Southbend SB1055F 16" X 60" w/DRO Benutzerhandbuch

-90-

For Machines Mfg. Since 3/11

16-Speed Gearhead Lathe

E L E C T R I C A L

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 148.

3. Close and latch the electrical box, and

reconnect the machine to the power source.

Swap any two

of these wires

L3

L2

L1

To Power

Supply

Hot

MASTER

POWER SWITCH

Hot

Hot

Ground

Figure 148. Swapping L1 and L2 power connections

to correct out-of-phase wiring.