Jet JTM-1254RVS, Operating Instructions Manual

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2. Change incoming lead on transformer from
230V to 460V terminal (Figure 6-2).
3. Adjust overload relay setting to appropriate
amperage (Figure 6-2).
Figure 6-2
Before connecting to power source, make sure that
switch is in OFF position.
The mill must be properly grounded.
Check for proper spindle rotation in the low-speed
range . The spindle should rotate clockwise when
viewed from top of machine, and direction switch (A,
Figure 8-1) is set to the right. If spindle rotates
counterclockwise, disconnect from power and
switch two of the three power leads.
7.0 Lubrication
Do not operate mill before
lubricating the machine fully. Failure to comply
may cause damage to machine components.
The milling machine is equipped with an automatic
electric lubrication system for leadscrews and ways.
Ensure that reservoir has proper amount of
lubricant. The system reservoir is located at rear of
machine (Figure 7-1).
Use dial (A) to set time interval for shots of lubricant.
When machine is turned on, lubricator will send one
shot of lubricant through machine, then revert to
time interval pre-set by operator.
Press button (B) for three seconds to force-feed oil.
The lubricator remains active as long as milling
machine is turned on. To turn off lubricator while mill
is on, use top switch (C).
Remember to turn
lubricator on before operating machine.
Refer to section 10.0 for additional lubricating
instructions, before operating machine.
Figure 7-1
8.0 Operating instructions
8.1 Operating controls
The position of mill head can be set up to
accommodate the workpiece being machined. The
mill head can be set up for angles to left or right.
(The JTM-1254RVS also allows fore and aft head
movement.) The mill head can also be rotated on its
turret. The ram can be moved back and forth to
reach workpiece locations at fore and aft extremes
of worktable travel. Refer to
section 9.0.
8.2 Control panel
The control panel is located on the arm at right side
of machine. See Figure 8-1 for functions.
Figure 8-1
A – Spindle (motor) direction switch: Has three
positions: right (clockwise rotation), left
(counterclockwise rotation) and neutral (spindle
stop). Use clockwise rotation for normal, right-hand
tooling.
Forward (clockwise) operation occurs only when
gearbox is in low speed position. When gearbox is
in high-speed position, the motor switch must be in
the Reverse position to provide right-hand or
clockwise rotation. Refer to Table 2 for required
switch positions.