CHESTER Champion 20VS, Руководство по эксплуатации

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4.6 Changing the speed range
Wait until the machine has come to a complete halt before changing the speed using
the gear switch.
• Turn the gear switch in the position ‘H’ for a speed range of 200 – 3000 min
• Turn the gear switch into the position ‘L’ for a speed range of 100 – 1500 min
• Adjust the speed with the potentiometer. The speed and the cutting speed depends
on the material of the workpiece, the milling cutter diameter and the cutting type.
The electronics controls the rotation speed slowly with a ramp to the set point.
Therefore, wait briefly before you continue with feed motion while milling or drilling.
4.6 Selecting the speed
For milling operations, the essential factor is the selection of the correct speed. The
speed determines the cutting speed of the cutting edges which cut the material. By
selecting the correct cutting speed, the service life of the tool is increased and the
working result is optimized.
The optimum cutting speed mainly depends on the material and on the material of
the tool. With tools (milling cutters) made of hard metal or ceramic insert it is possible
to work with higher speeds than with tools made of high-alloy high speed steel
(HSS). You will achieve the correct cutting speed by selecting the correct speed.
For the correct cutting speed for your tool and for the material to be cut you may
refer to the following standard values or a table reference book.
The required speed is calculated as follows:
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