Southbend 14" Turn-X Toolroom Lathe SB1039 - Manual (Page 90)

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For Machines Mfg. Since 5/11 14" TURN-X ® Toolroom 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 138.
To Plug
Hot
L3 L2 L1
Gn
Ground
1
2
5 3
6 4
MASTER
POWER SWITCH
Hot Hot
Swap any two
of these wires
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
Power Supply
Connection
Page 95
Work Lamp
Page 95
Spindle
Switches
Page 94
Coolant
Pump Motor
Page 92
Control Panel
Page 94
Spindle Motor
Page 92
End Gear Cover
Safety Switch
Page 95
Brake Pedal
Safety Switch
Page 95
Chuck Guard
Safety Switch
Page 95
Electrical
Cabinet
Page 90