Delta 2000 Series - Electrical Connections; Changing Speeds

ELECTRICAL CONNECTIONS
If the motor on your machine is wired for 230V single
phase, the power cord is equipped with a plug that has
two flat, current-carrying prongs in tandem, and one
round or "U"-shaped longer ground prong. This is used
only with the proper mating 3-conductor grounding type
receptacle, as shown in Fig. 3. When the three-prong
plug on your machine is plugged into a grounded, 3-
conductor receptacle, the long ground prong on the plug
contacts first so the machine is properly grounded be¬
fore electricity reaches it.
If the motor on your machine is wired for 200V, 230V or
460V three phase, the necessary wiring from the starter
to the power source should be completed by a com¬
petent electrician.
IMPORTANT: Make sure the electrical characteristics
are the same between the motor nameplate and the
power source and make sure the power circuit the drill
press will be used on is properly fused and that the
wire size is correct, as shown in Fig. 4. MAKE SURE
THE DRILL PRESS IS PROPERLY GROUNDED.
WIRE AND FUSE SIZE
SINGLE PHASE
THREE PHASE
230 VOLTS 200 - 230 VOLTS
460 VOLTS
HP
WIRE SIZE
TIME LAG
FUSE*
WIRE SIZE
TIME LAG
FUSE*
WIRE SIZE
TIME LAG
FUSE*
1% 12 20
14
15
14
15
Fl ®* 4 ‘Size fuse selected for branch circuit protection.
Flo. 3
SPINDLE SPEEDS
With the Step Pulley - Direct Drive Drilling Machine
you get eight selected speeds with full H P at the spindle
at all speeds. The speeds available with your drilling
machine are 375, 600, 900, 1275, 1800, 2400, 3075 and
4250 RPM. The highest speed is obtained when the belt
is on the largest step of the motor pulley and the small¬
est step of the spindle pulley.
CHANGING SPEEDS
When changing speeds on your drilling machine, proceed
as follows:
1. DISCONNECT MACHINE FROM POWER SOURCE.
2. Loosen wing nut located on the opposite end of the
plate (A) Fig. 5. (This wing nut is shown at (D) Fig. 6.)
The motor and motor plate can then be tilted forward, as
shown in Fig. 5, releasing the belt tension.
3. Open the door (B) Fig. 5, tilt the motor pulley (C)
forward, and move the belt to the desired steps on the
motor and spindle pulleys, as shown in Fig. 5.
4. After the belt is positioned on the pulleys, close
the door (B) Fig. 5, and tighten the wing nut located on
the opposite end of the plate (A) to keep the motor
pulley, motor and motor plate in the vertical position.
-II
Fig. 5
4