Jet JMD-40GH, Operating Instructions And Parts Manual

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6.2 Voltage conversion
To convert machine to 230 volt operation:
1. Change incoming power leads according to
wiring diagram on inside cover of motor junction
box.
2. Replace plug on end of motor cord with a
UL/CSA listed plug rated for 230V; or hardwire
the machine.
6.3 Extension cords
The use of extension cords is discouraged; try to
position equipment within reach of the power
source. If an extension cord becomes necessary, be
sure it is heavy enough to carry the current your
product will draw. An undersized cord will cause a
drop in line voltage resulting in loss of power and
overheating.
Table 2 shows recommended size to use depending
on cord length and nameplate ampere rating. If in
doubt, use the next heavier gauge. The smaller the
gauge number, the heavier the cord.
Ampere
Rating
Volts
Total length of
cord in feet
More
Than
Not
More
Than
120
240 25
50 50
100 100
200 150
300
AWG
0 6 18 16 16 14
6 10 18 16 14 12
10 12 16 16 14 12
12 16 14 12
Not
Recommended
Table 2: Extension Cord Recommendations
6.4 Overload re-set button
If the Mill-Drill becomes overloaded and motor shuts
off, wait for machine to cool down, then push re-set
button on motor junction box. Restart machine. If
overloading happens frequently, refer to
sect. 10.0,
Troubleshooting.
7.0 Adjustments
Disconnect machine from
power source before making adjustments,
unless indicated otherwise.
7.1 Removing and installing arbors
1. Disconnect machine from power source.
2. Remove spindle cap to expose drawbar (Figure
7-1)
3. Loosen drawbar with provided socket wrench
counterclockwise 2 or 3 full turns.
4. Tap drawbar head with rubber mallet to
dislodge arbor.
Do not loosen drawbar
more than 3 or 4 turns before hitting with
rubber mallet. Damage to drawbar threads
may occur.
5. Grasp arbor with one hand while loosening
drawbar with the other. Continue to loosen
drawbar until arbor can be withdrawn from
spindle. Wipe out spindle with clean, dry rag.
6. Wipe new arbor with clean, dry rag and place
arbor into spindle. Thread drawbar into arbor
from above. Tighten drawbar with wrench. Do
not overtighten.
Figure 7-1
7.2 Head adjustments
See Figure 7-2.
7.2.1 Head elevation
Loosen two hex nuts (Q, JMD-40) or handles (R,
JMD-45). Turn crank handle (E) clockwise to raise
head on column, counterclockwise to lower head.
Always tighten nuts/handles securely before milling
or drilling operations.
7.2.2 Head rotation (JMD-40GH/GHPF)
Applicable only to JMD-40 models. Loosen two lock
nuts (Q) with 24mm wrench, and rotate head around
column. Make sure rack moves with head without
binding. Retighten both lock nuts (Q) securely.
7.2.3 Head swivel
1. To swivel head up to 90° left or 30° right, loosen
lock nut (S) on each side, and remove locating
pin (T).
2. Swivel head to desired angle on scale.
Retighten both lock nuts.
3. When returning head to vertical position (0-
deg.), re-insert locating pin (T) and securely
tighten both lock nuts (S).