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8.0 ELECTRICAL CONNECTIONS
!
All electrical connections must be made by a
qualified electrician! Failure to comply may cause
serious injury!
8.1 GENERAL ELECTRICAL CAUTIONS
This machine must be grounded in accordance with the
National Electrical Code and local codes and ordinances.
This work should be done by a qualified electrician. The
machine must be grounded to protect the user from electri-
cal shock.
8.2 WIRE SIZES
!
For circuits which are far away from the electrical
service box, the wire size must be increased in
order to deliver ample voltage to the motor.
To minimize power losses and to prevent motor overheat-
ing and burnout, the use of wire sizes for branch circuits or
electrical extension cords according to the following table
is recommended:
Conductor Length
0 – 50 Ft.
50 – 100 Ft.
Over 100 Ft.
Confirm that power at the site matches power require-
ments of the mill before connecting to the power source.
The ETM-949 has been pre-wired for 230 volt operation.
Before connecting to the power source, make sure that the
switch is in the off position.
The mill must be properly grounded.
Check for proper spindle rotation in the high-speed range.
The spindle should rotate clockwise when viewed from the
top of the machine. If the spindle rotates counter-clock-
wise, disconnect from power and switch two of the three
ETM–949 | ETM–949EVS
AWG Number
230/460 Volt
120 Volt Lines
Lines
No. 14
No. 14
No. 14
No. 12
No. 12
No. 8
Table 1
power leads.
8.3 LUBRICATION
!
Do not operate the mill before lubricating the
machine fully. Failure to comply may cause damage
to the machine.
Refer to the Maintenance/Lubrication section and make
sure the machine has been fully lubricated before operat-
ing.
9.0 OPERATING INSTRUCTIONS
9.1 Operating Controls
The milling machine is equipped with an automatic lubrica-
tion system. Ensure that reservoir has the proper amount
of lubricant. The system reservoir is located on the left
side of the machine on the knee.
The position of the milling machine mill head can be set
up to accommodate the work piece being machined. The
mill head can be set up for angles to the left or right and
for fore and aft angles. The mill head can also be rotated
on its turret. The ram can be moved back and forth to
reach work piece locations at the fore and aft extremes of
worktable travel. Refer to the Adjustments section.
9.2 Motor Switch
The Motor Switch is located on the right side of the
machine on the control panel arm. The switch has two
positions: FWD (forward) and REV (reverse).
Setting the switch to FWD will provide clockwise spindle
rotation. Use FWD for normal, right-hand tooling.
FWD (clockwise) operation occurs only when the gear-
box is in the low speed position. When the gearbox is in
high-speed position, the motor switch must be in the REV
position to provide right-hand or clockwise rotation. Refer
to Figure 5 for a chart of required switch positions.
The motor switch controls a three-phase motor. The motor
can be switched from FWD to REV and back with the
motor running, and will reverse direction when the switch
setting is changed. At higher speeds, this may put strain
on the timing belt but there will be no damage to the motor
or gear mechanism.
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