Acer DYNAMIC 2140GH Operation Manual page 31

SPINDLE SPEED SELECTION, STOP & RE-START : (Conventional Type)
The first turn on the power source switch and then, set the feed direction selecting
lever (7) at neutral position, set the spindle speed change lever (5) to the desired speed
rate and set the hi-low speed selecting lever (6) to either high or low position, after that,
move the spindle start lever (19) upward or downward which will caused the spindle
rotates in counter – clockwise or in clockwise direction. (Speed selecting can be referred
as Graph 2)
As for to stop the spindle rotation which can be employed your foot leg to foot pedal
the foot pedal brake (23).
After the spindle stopped by foot pedal brake and want to restart the spindle rotation, the
spindle start lever should be pushed to the neutral position first, and then, followed by
the selection of forward / reverse direction.
CAUTIONS
．If want to change the spindle speed which must be stopped the spindle rotating,
otherwise, the gear of headstock will be damaged.
．If it is hard to set the lever on position when making speed change, we can push the
jogging switch (22) slightly and then, set the selecting lever again.
HOW TO OPERATE THE JOGGING SWITCH
During in operating, if we want to make speed change more easier or adjusting the
center for chucking raw material when four jaws chuck is used and then, we can employ
couple with the jogging switch (22).
GEAR CHANGE SYSTEM
The gear change system is located at the left side of the headstock as fig shown,
please refer to thread cutting as Graph 1.
CAUTIONS
．Don't attempt to change gears when the spindle is running.
Graph 1 Graph2
23