Jet J-1600R, Operating Instructions And Parts Manual

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8.24
Arm/spindle control lever
The four-position arm/spindle control lever is
located on left hand side of drill head console. See
Figure 10. It controls spindle rotation direction and
raising and lowering of the arm.
The ability to control the height of the arm is
available when:
1. Main power to machine is ON at its branch
service panel.
2. Emergency STOP switch is disengaged.
3. Power switch is pushed ON.
4. The column and arm UNLOCK button (right
hand side of drill head –
see Figure 10
) is
pressed to disengage machine locks.
NOTE: The control lever does not return to neutral
when released, but remains in position. This
means unless you return it to neutral, the arm will
keep raising or lowering until it contacts a limit
switch.
9.0
Adjustments
After extended use – usually several years – the
radial arm drill may require adjustment of certain
parts. Two areas require particular attention:
•
The clamping device.
•
The gap between head and rail.
9.1
Clamping device
If there is backlash in the clamping device, correct
as follows.
Refer to Figure 16.
1. Press and hold
unlock button
(see Figure 10)
until arrow (Figure 16) points to “B”. Release
button. Clamping device is now disengaged.
2. Loosen the five
locking nuts
(C).
Figure 16: Clamp adjustments
3. Turn the five upper
adjusting nuts
(D)
counterclockwise approximately 180°.
4. Re-tighten the five locking nuts (C).
5. Move arm/spindle control lever to Arm UP.
6. Press emergency stop button after arm has
elevated a short distance.
7. Press unlock button to release clamping
device.
8. Release locking nut. (E, Figure 16).
9. Rotate adjustment nut (F) approximately 180°
clockwise.
10. Retighten locking nut (E).
11. Move arm/spindle control lever to neutral.
12. Reset emergency stop button.
Figure 17: Clamp adjustments
9.2
Head/rail backlash
If backlash ever appears between gearbox head
and arm rail, the tightness between rail and
bearings can be corrected, as follows.
Refer to Figure 18.
1. Remove side plate (G) by removing screws.
2. Loosen set screws (H).
3. Insert hex key into holes (J), and rotate the
bearing shaft. Rotate handwheel on front of
head; it should be snug but still easily turned.
4. Tighten set screws (H).
5. Repeat steps 1 through 4 for opposite side of
head.
6. Install side plates (G) on both sides of head.
Figure 18: Head/rail backlash adjustments