Southbend sb1016 owner manual Circuit Requirements for 220V Model SB1016, Grounding Requirements

Model SB1016/SB1036 P R E P A R A T I O N For Machines Mfg. Since 7/09

Circuit Requirements for 220V (Model SB1016)

This machine is prewired to operate on a 220V power supply circuit that has a verified ground and meets the following requirements:

Nominal Voltage	............................... 220V/240V
Cycle	60 Hz
Phase	Three-Phase
Circuit Rating	40 Amps
Connection Type	..............Hardwire (Page 24)

Grounding Requirements

In the event of certain types of malfunctions or breakdowns, grounding provides a path of least resistance for electric current—in order to reduce the risk of electric shock.

Power supply connections that are hardwired to the power source must be connected to a grounded metal permanent wiring system, or to a system having an equipment-grounding conductor.

		Locking
Power Source	Disconnect Switch		Machine
Conduit		Conduit

Figure 2. Typical hardwire setup with a locking

disconnect switch.

Due to the complexity required for planning, bending, and installing the conduit necessary for a hardwire setup, this type of setup can only be performed by a qualified electrician.

Serious injury could occur if you connect the machine to power before completing the setup process. DO NOT connect to power until instructed later in this manual.

Correcting Phase Polarity (Yaskawa Drive)

This sub-section is only provided for troubleshooting by a qualified electrician. If you discover during the test run that the lathe will not operate, or that one or more motors run backwards, incorrect phase polarity may be at fault and will need to be corrected.

To establish the correct phase polarity:

1.Disconnect the machine from power, wait 15 minutes for the drive unit capacitors to discharge.

—If the spindle motor rotates in the incorrect direction, swap any two of the output wires U, V, or W that are located at the variable frequency drive shown in Figure 3.

Note: Swapping any two of the L1, L2, or L3 incoming power leads located at the input of the machine or frequency drive has no effect on spindle motor rotation.

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Varispeed G7

79

8?

35

3?

B#

B$

B5

E5

?B

B%

5%

B&

5&

?3

?4

?5

E5

3#

3$

3%

H

35

H

DB

D

D

E

E

?#

?$

79

E#

E$

E%

E&

E'

E(

E)

E*

E+

E#"E##E#$

#9

K6G>67A:HE::9JC>I

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				Swap any
					Two of
		12 14	18	10	11
15	13			These Wires
		23
16
17

R/L1 S/L2 T/L3 1 2 B1 B2 U/T1 V/T2 W/T3

L1 L2 L3 B1 B2 U V W

Figure 3. Spindle motor power supply wires at

variable frequency drive unit.

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