Jet ETM-949, Operating Instructions Manual

Page: 13 / 52

13 ETM–949 | ETM–949EVS
9.3 SPEED CONTROL
9.3.1 VARIABLE SPEED CONTROL
The vari-speed handwheel (A, Figure 6) is used to control
the spindle speed. The speeds for high and low speed
ranges are displayed on the panel on the front of the mill
head (B, Figure 6).
All speed changes must be made while the motor is run-
ning. Attempting speed changes without the motor running
can result in damage to the drive mechanism.
9.4 SPINDLE BRAKE
The spindle brake lever is located on the upper left side of
the mill head (Figure 7). Pull lever downward to apply the
brake. The spindle brake is also equipped with a power cut
off microswitch. When the brake is applied, the power to
motor is also disengaged.
!
Change speed only while the spindle is turning.
9.5 HIGH-NEUTRAL-LOW SHIFT LEVER
The mill head can be driven directly (High Speed) or
through the back gear (Low Speed) in the mill head. The
selection is made by changing the position of the shift
lever.
The shift lever is located at the lower right side of the mill
head (Figure 8). The lever position closest to the operator
is the High setting. The lever position away from the oper-
ator is the Low setting. The middle position is the Neutral
setting.
9.6 QUILL POWER FEED LEVER
!
Do not shift the High-Low Gear Lever while the mo-
tor is running. Rotate the spindle by hand to facili-
tate changing lever positions.
Fig. 8
!
Do not use power feed at speeds above 3000 R.P.M.
9.3.2 ELECTRONIC VARIABLE SPEED
The dial on the EVS control panel controls the main mo-
tor speed. Motor rpm is displayed on the display screen.
When in low gear, the light beside display 1 will be illumi-
nated. When in high gear the light beside display 2 will be
illuminated.
Fig. 6
B
A
Fig. 7
Brake Lever