Powermatic 4224B Electrical connections, Single phase operation, Three phase operation

Figure 22

Materials used:

2 – 2x6’s (cut to length).

10 – wood dowels, 4’ length, 5/8” diameter.

1.Mark your hole centers (2” centers) along the length of a 2x6. Place the holes so that the tops of the dowels will be even with the tops of the ledges on the Lathe. Also, adjust your hole centers as necessary so that the first and last dowel will begin at approximately the same distance from the ledge at both ends of the Lathe.

2.Use a 5/8” spade bit chucked in a drill press or in a portable drill. Bore the holes through one 2x6; this will be the rear piece.

3.On the other 2x6, do not bore through but only deep enough to securely hold the ends of the dowel rods. This will be the front piece and will provide a pleasing appearance at the front of your Lathe.

4.When all holes have been bored, place the 2x6’s on edge in the outer ledges of the Lathe.

5.Cut the dowel rods to length with a miter saw or hand saw, so that after insertion the rods will be flush with the back of the rear 2x6.

6.Insert the dowel rods through the holes in the rear 2x6, as shown in Figure 22.

7.A strip of wood can be screwed to the rear 2x6 to cover the dowel holes and prevent the dowels from working out.

16

8.0Electrical connections

Electrical connections must be made by a qualified electrician in compliance with all relevant codes. This machine must be properly grounded to help prevent electrical shock and possible fatal injury.

The 4224B Lathe will operate on single phase or three phase, 230 volt power supply.

Make sure the characteristics of your power supply match the power specifications on the lathe inverter.

Before connecting to power source, be sure switch is in off position.

It is recommended that the lathe be connected to a dedicated 20 amp circuit with a 20 amp circuit breaker or time-delay fuse marked “D”. Local codes take precedence over recommendations.

8.1Single phase operation

A three wire pigtail for use on 230 volt single phase power is attached to the inverter and may be “hard- wired” to the power source, or connected to a UL/CSA listed receptacle plug.

Connect the 230 volt supply to the black and white leads and ground the green lead.

If you are hard-wiring the Lathe to a panel, make sure a disconnect is available for the operator. During hard-wiring of the Lathe, make sure the fuses have been removed or the breakers have been tripped in the circuit to which the Lathe will be connected. Place a warning placard on the fuse holder or circuit breaker to prevent it being turned on while the machine is being wired.

8.2Three phase operation

If three phase power is used, it will be necessary to replace the pigtail wire attached to the inverter with a 12/4 wire and connect the three hot leads to the inverter at R, S, T as shown in the wiring diagram in section 18.0. Always connect the ground lead.

8.3Variable frequency drive

The lathe uses a Variable Frequency Drive – also called an A.C. Inverter – to provide infinitely variable spindle speeds within the specified ranges. The inverter controls the speed of the motor by varying the frequency of the voltage supplied to the motor. The inverter provides an acceleration ramp that eliminates the shock of normal starting. Also, a braking feature eliminates long coasting periods after the lathe is turned off.

The 3-horsepower motor is specially designed for use with inverter drives, and is balanced to reduce noise and minimize vibration.