6-2. Spindle speed control
A. Identification before operation
Ensure that lubrication has been carried out as described before.
When the main spindle is rotating, the gearbox and feed axis of the bedsides are put into operation.
The forward/reverse switch (21) should be on neutral. The feed axis selector (26) and feed / thread
selector handle (22) are in disengaged position. Under these circumstances, both the longitudinal
traverse handwheel and cross traverse handle (27) can be operated by hand.
B. Main spindle rotation
The main spindle rotation is selected by forward / reverse switch.
C. Main spindle speed
The speed of the main spindle is selecting by (high / low). Speed selector (3) and 4 steps speed
selector (2). For both high and low speed, there are 4 different positions. For correct speed, please
refer to the speed chart. When selector (3) is on “high”, we can get the four speeds, according to
the graph.
Never change the speed before the motor has stopped completely!
Adjustment the speed can be assisted by turn the main spindle by hand.
D. Running-in
Running in should be done at lowest possible spindle speed. Let the machine to run at lowest
speed for about twenty minutes, and then check for irregularities. If everything seems in order,
gradually increase the speed.
E. Operation
Use only high peripheral speed type chucks.
The maximum spindle speed for chuck plate of 254mm diameter should not be more than 1255rpm.
When thread cutting or auto feeding are not in use, the feed/thread selector should be in neutral
position, so as to ensure disengagement of the leadscrew and the feed rod. To avoid unnecessary
wear, the thread dial indicator should be out of mesh with the leadscrew.
Page 8
Instructions Manual for AL-356 (L564D)
01/09/2017
Summary of Contents for AL-356
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