Jet JTM-1050, Operating Instructions And Parts Manual

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4. Using mineral spirits or other cleaning solvent,
clean all of the rust proofing from where it may
have been applied. This is important; moving
the table or any other components before
removing the rust proofing will only put rust
proofing where you don’t want it. (Do not use
gasoline, paint thinner, or lacquer thinner.
These will damage painted surfaces.)
5. Lubricate exposed ways, then move each unit
(table and ram) to the opposite limit stop, and
clean and lubricate the newly exposed ways.
Loosen bolts to unlock ram and move it
forward and backward to the full length in
order to clean and lubricate.
6. Cover all machined surfaces with a film of light
machine tool oil to inhibit rust.
Some of the following steps may have already
been performed on the machine. If so, ignore the
instructions related to those particular steps.
Otherwise, perform them in the order listed. Refer
to Figures 2 and 5 to help locate items.
1. Install the table longitudinal and cross-feed
crank handles on their respective shafts using
the nuts on the shafts to secure them.
2. Remove any rust proofing from the drawbar
and its washer, and put the drawbar with
washer installed into the spindle center
through the top of the machine.
3. Slide the fine feed handwheel over the
handwheel hub and push it back until its roll
pin engages the hole in the hub and the wheel
is flush with the hub surface.
4. Put the coarse feed handle on the feed shaft
and tap it lightly until its roll pin engages a hole
in the hub and it is flush against the hub
surface.
5. Unwrap and clean the elevating (knee) crank
and install it on its shaft.
6. Install the rubber way covers at front and
behind the table.
8.6 Lubrication
Do not operate the mill before
lubricating the machine fully. Failure to comply
may cause damage to the machine.
Before operating mill, refer to sect. 13.2 for
lubricating instructions.
9.0 Electrical Connections
All electrical connections
must be made by a qualified electrician. Failure
to comply may cause serious or fatal injury.
The JTM-1050 mill is rated at 230/460V, 3-phase
and comes from the factory prewired at 230V.
Confirm power at the site matches power
requirements of the mill before connecting to the
power source. The power source should be
dedicated to the JTM-1050 mill. The main power
switch is located on the right side of the machine.
Remove the cover, and run the main power cable
through the box and attach the ground, followed by
power leads. Replace the cover.
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 counterclockwise, disconnect from the
power source, and switch two of the power leads.
To change from 230V to 460V operation, remove
the junction box cover on the motor, and change
the wires according to the diagram found on the
inside of the cover. A similar wiring diagram is
found at the back of this manual.
Note: If
discrepancies arise, diagrams on machine take
precedence.
The mill must be properly grounded.
9.1 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 overheating and burnout, the use of
wire sizes for branch circuits or electrical extension
cords according to the following table is
recommended:
Conductor
Length
AWG Number
230/460 Volt Lines
0 – 50 Ft. No. 14
50 – 100 Ft. No. 14
Over 100 Ft. No. 12
Table 1