Jet JTM-949EVS/230, Operating Instructions And Parts Manual

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16
9.14
Fine feed handwheel
When the controls are set for the
Fine feed using
Handwheel
position (see Table 2), the
Fine Feed
Handwheel
(A, Figure 10) can be used for manual fine
feed control in either upward or downward direction of the
quill.
Remove Manual Fine Feed
Handwheel when not in use.
Failure to comply may cause serious injury.
9.15
Depth scale and stop
Referring to Figure 14:
The
Depth Scale and Stop
are used in drilling operations
to set the depth of the drilled hole. The depth scale is
located on front of mill head. The scale consists of a
Micrometer Adjusting Nut
(A),
Lock Nut
(B),
Quill Stop
(C),
Quill Stop Screw
(D), and
Scale
(E).
The
Micrometer Adjusting Nut
is set to the desired
dimension and locked in place using the
Lock Nut
. The
quill stop provides a positive stop for quill travel.
The graduations on the micrometer nut are in 0.001-inch
increments. Adjustment of quill travel is made by rotating
micrometer nut.
Figure 12
9.16
Power feed operation
The
Feed Trip Adjustment
sets the point at which the quill
will reset during
Power Feed
.
Refer to Figure 13.
Be sure that the Manual Fine Feed
Handwheel is removed. Failure to
comply may cause serious injury.
1. Move adjuster nut to allow for ample spindle travel.
2. With the
Quill Feed Handle
(J), advance the quill to
the point where the feed should stop.
3. Engage
the Feed Trip Cam Lever
(D) by pulling
away from head assembly.
4. Adjust
Micrometer Adjusting Nut
(H) against
Quill
Stop
(G).
5. Continue turning the
Micrometer Adjusting Nut
(H)
until the
Feed Trip Cam Lever
(D) trips.
6. Tighten the
Locknut
(I).
7. Ensure
Quill Lock
(K) is disengaged by rotating
counter-clockwise.
8. Start spindle (see Table 2):
9. Select feed rate at the control panel.
10. Set
Feed Rate Lever
(B) to feed rate required for the
tooling and material.
11. Place
Quill Feed Engagement Lever
(F) in the
Engaged
position.
12. Select feed direction by setting
Feed Direction Knob
(C) position per Table 3:
Spindle
Direction
Feed
Direction
Knob
Position
CW
Down In
Up Out
CCW
Down Out
Up In
Table 3
13. Engage
Feed Trip Cam Lever
(D) by pulling away
from head assembly.
Note:
Due to variables in tool diameter, coatings, coolant,
and materials, no specific spindle speed or feed rate
recommendations are provided. Use general shop
manuals that have data applicable to the milling and
drilling operations being performed. Or, contact the
supplier of the tooling, coolant, and material for specific
recommendations.
IMPORTANT:
The power feed can be used for drills up
to 3/8” in diameter (mild steel). Use manual feed for drills
larger than 3/8”.
The overload clutch is factory set to
hold up to 200 lbs. downfeed pressure on the quill
(accommodates drills up to 3/8”). Do not attempt to
adjust clutch pressure.
Figure 13