Electrical branch service, Wiring diagram

Caution

Electrical set-up should be performed only by a licensed electrician who is familiar with national and local electrical codes.

The Model 1230 is shipped after testing all functions and circuits under electrical power specified for the machine and motors. The only hook-up requirement should be for correct connec- tion to an appropriate cutout on an appropriate service branch.

Where the following instructions do not agree with local electrical codes and procedures, the applicable codes and procedures should be followed, exclusively.

Electrical

Electrical branch service

The machine is wired for either a 230 or 460 3- phase service branch. The cable supplying the drill press will be tagged with the voltage at which the machine was tested and corresponding to the customer's order.

If the tag has been lost, it will be necessary for you to open the electrical cabinet on the rear of the drill press and examine the connections on the transformer found inside the box. The transformer can be connected to either a 230 or 460 volt source and its taps are labeled for voltage. By locating the source tap on the transformer you will be able to determine the branch voltage required.

A service disconnect is recommended. The use of fuses or circuit breakers for each of the voltage supply wires is required. Use fuses or circuit breakers which are appropriate to the voltage for the motor system delivered.

A positive cut-out/lock-out lever or rocker switch should be located on the outside of the service disconnect to allow the machine operator to discon- nect the machine from the branch circuit when working with tooling on the machine.

To connect the branch to the drill press

1.Disconnect the service branch to the machine by moving the lever or rocker switch on the cutout box to OFF.

2Connect the green wire (or green with white trace) to the branch ground.

3.Connect the remaining three wires in the cable (labeled R,S and T) to the three power lines in the branch.

4.Turn the power to the machine ON at the cutout box.

5.Turn the coolant pump power switch (See Fig. 1)

to the ON position.

6.Observe the direction of rotation of the coolant pump. You can see the pump shaft rotate on top of the pump at the rear of the drill press. There will be an arrow cast into the pump, and the shaft should be rotating in the direction of the arrow. If the shaft is rotating in the wrong direction, the power is connected, backwards. Correct as follows:

7.Disconnect power to the machine by turning it off at the cutout box.

8.Reverse any two of the power lead connections.

9.Repeat steps 4, 5, and 6, above, and you should observe the pump shaft turning in the correct direc- tion. The electrical service to the machine is now complete.

Wiring diagram

A wiring diagram for the drill press is found on the facing page. This diagram is for reference by your licensed installing or servicing electrician. In addition to using a licensed electrician for connection to the drill press service branch, the servicing of components and circuits inside the control box should be serviced only by a qualified electrician. This includes fuse replacement, if required. If any of these fuses, upon replacement, should continue to fail at short service intervals, the electrician should be asked to check all machine components for excessive loads, short circuits or other failures.