Model G0740 (Mfg. Since 11/12) -17-
this sub-section is only provided for troubleshoot-
ing. if you discover during the Test Run (Page
26), 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 the phase polarity requires reversing
the positions where two of the incoming power
source wires are connected. Due to the high
voltage and risk of serious shock involved, we
strongly recommend this procedure only be done
by an electrician or qualified service personnel.
To correct wiring that is out of phase:
1. push the stop button, turn the two-speed
motor switch to oFF, and DisConneCt
the maChine From poWer!
Correcting Phase
Polarity Wiring
R S T E R1 S1 T1
U1 V1 W1 E 0 2 3
Ground
1
R S
E
4 5 6 7 8
T R1
R1
S1
S1 S1
T1
T1
U1
U1
V1
E
EE
W1
W1
E 0
0
A1
2
3
3
4 5
5
6
6
6
7
7
8
4
8
4
4 5 6 7 8
33
E
W1V1
U1R1 S1 T1
E
E
TR S
0
T
S
R
0 4 6322
A1
A1
2
11
figure 10. swapping power connections to
correct out-of-phase wiring.
3. Close and latch the electrical box, and recon-
nect the machine to the power source.
swap any two of
these Wires
to plug
2. open the electrical box and swap any two hot
wires r, s, t, as illustrated in figure 10.
Note: If using a phase converter for 220V
3-phase operation, ONLY swap the R and T
wires to correct out of phase wiring. The "wild
wire" is connected to the S terminal.