Hafco AL-320G, Operation Manual

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D.1 Main Transmission System
Power comes from the motor to the input shaft #37 via input pulley #1, From the input pulley to
main spindle #40 via middle shaft #38. The main spindle has a range of 6 speeds by operating
the speed changing handles on the head stock. (Fig.1) The pulley has two belt positions, and by
changing the belts, the main spindle can achieve 12 speeds.
D.2 FEEDING SYSTEM
D.2.1 The Longitudinal And Cross Feeding Of Toolpost
The Auto Feeding systems is powered from the main spindle through a selection of change
gears, which can be swapped to change the feed rate of the auto feed.
The feed travel direction can be changed with the lever in Fig. 3 with a neutral position in the
middle to stop the rotation of the lead screw shaft. This lever should not be changed while the
spindle is running.
To engage the auto feed use the handle on the carriage. It has three positions, 1 neutral (no
feed engagement), 2 feed to the cross slide or 3 feed to the longitudinal travel. (Fig 2) The
machine feed gears are factory set to A=24, B=50, C=25, D=48, producing 0.100mm per rev-
olution longitudinal travel and 0.022mm per revolution cross travel. This feed step up is rec-
ommended for most general purpose work. If a coarser feed rate is required or for threading
operations please refer to chart on page 10.
NOTE:
To reverse the direction of the feed travel, move the lever in the picture below right or
left.(Fig. 4) The lever should not be moved when the spindle is turning (Fig. 3)
Do Not change direction with
the spindle running
Fig. 1
Fig. 3
Fig. 4
Fig. 2
Page 8 Instructions Manual for AL-320G (L141) 07/02/2018