Sharp TMV Series Service And Parts Manual page 12

Note: 2. Maximum drilling capacity in automatic feed is 3/4" (19mm).
3. The power feed transmission engagement crank shall be placed at "OUT"
4. Do not use automatic feed when the turning speed is in excess of 3,000 RPM
5, Do not change the feed speed optionally by means of quill speed selector during
6. Lock up the quill lock of quill for far better milling surface when the unit is not
4. Speed change of spindle:
By means of the variation of one set of sliding belt Pulley and counter shaft gear (high or low
speed), the spindle revolution speed is changed accordingly.
a. Change of high and low speeds: (Fig.4)
Break the spindle
Push and Turn lever (H) in either direction to the next horizontal position. You can feel
the "SNAP IN" correct position through the ball-spring mechanism if difficulty
happened in meshing gears, inching the spindle through brake lever.
Notes:
a)
b)
c)
b. Speed change hand wheel:
Stepless speed variation between high and low speeds may be controlled by means of the
turning hand wheel (A) (Figure 5). When it is turned clockwise, it is for higher speed.
Note:
a: Do not change the speed when the spindle stands still.
b: Avoid to use it when the speed is in excess of 3,000 RPM.
c: In the process of speed change from high speed to low speed, and vice-versa, do not
change the speed rapidly to safeguard the service life of the internal mechanism.
d: It takes roughly 10 to 15 second to change from low speed to the high one.
position when the automatic feed is not in operation. DO NOT move the power
feed transmission engagement crank when the spindle is in revolution.
the revolution.
making the manual or automatic feed.
The spindle must be motionless completely during the speed change.
To shift the high speed into the low one, the spindle must be slightly turned to
make it easier for the counter shaft to engage.
To shift the low speed into the high one, use the brake lever so as to put a stop to
the spindle clutch. Then turn the spindle slightly so that the clutch may be
engaged feasibly. A "click" sound of engagement may be sensed at this moment.
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