5. After the belts (D) Fig. 26, are positioned on the |
desired steps of the motor, center and spindle pulleys, |
move tension lever (C) to the rear until the belts (D) are |
properly tensioned and tighten the two tension lock |
knobs (B). The belts (D) should be just tight enough to |
prevent slipping. Excessive tension will reduce the life of |
the belts, pulleys and bearings. Correct tension is |
A | D | D | E |
obtained when the belts (D) can be flexed about 1″ out |
of line midway between the pulleys using light finger |
C
F
pressure. |
B
Fig. 26
DRILLING HOLES TO DEPTH
Where a number of holes are to be drilled to exactly the same depth, a depth stop is provided in the pinion shaft housing (A) Fig. 27, and is used as follows:
D
C
A
1.Loosen lock lever (B) Fig. 27, and rotate housing (A) until the pointer (C) lines up with the depth indicated on the English/Metric scale (D) that you want the spindle to lower. Then tighten lock lever (B).
2.The spindle will then lower to the exact depth as indicated on the scale (D) Fig. 27
ADJUSTING SPINDLE
RETURN SPRING
For the purpose of automatically returning the spindle upward after a hole has been drilled, a spindle return spring is provided in the spring housing (A) Fig. 28. This spring has been properly adjusted at the factory and should not be disturbed unless absolutely necessary. To adjust the return spring, proceed as follows:
DISCONNECT MACHINE FROM THE POWER SOURCE.
1.Loosen the two nuts (B) Fig. 28, approximately one- quarter inch. IMPORTANT: DO NOT REMOVE NUTS
(B) FROM SHAFT.
2.While FIRMLY holding spring housing (A) Fig. 28, pull out housing and rotate it until the roll pin (C) is engaged with the next notch on the housing. Turn the housing counterclockwise to increase and clockwise to decrease spring tension. Then tighten the two nuts (B) to hold the housing in place. IMPORTANT: NUTS (B)
SHOULD NOT CONTACT SPRING HOUSING (A) WHEN TIGHT.
B
Fig. 27
C
A
B
Fig. 28
A
B 
Fig. 29
16