Speed Selector | Turning Speeds | |
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The variable speed selector has seven position settings - 500, 580, 750, 1100, 1550, 2200 and 3070 RPM. The speed selector is linked to the splined headstock pulley. As the speed selector is shifted, the headstock pulley expands or con- tracts, changing the effective diameter of the pul- ley. Since the motor is also splined and spring- loaded, it will inversely change diameter due to the
To change speeds:
1.Turn the lathe on.
2.Pull the speed selector lever straight back away from the machine so the detent spring compresses. Figure 24.
3.Slowly shift the lever to the desired speed.
4.Make sure the lever is set in the detent for the desired speed, by listening for it to click into position.
Selecting the appropriate turning speed depends upon a number of factors. Most important is the diameter of the workpiece - the larger the diame- ter, the slower the speed. The type of wood is also important, harder woods require slower speeds. The sharpness of the cutting tool is also impor- tant. The sharper the tool, the slower the speed that can be used. Selecting the proper speed is a matter of trial and error at first. Start out with a slow speed at first, and if the cut is not clean and smooth, try the next highest speed.
When roughing out stock, always start at the slowest speed. Once the work is roughed out, 1100 RPM is generally a good speed for turning spindles with a 2'' or less diameter. Because peripheral speed increases as diameter increas- es, we recommend using a lower speed when turning larger diameter stock. When turning on the faceplate, a 580 or 750 RPM is recommend- ed. Outboard turning should generally be done at the slowest speed setting.
Operating at lower speeds is suitable for most applications. Lower speeds will also prolong chisel sharpness, especially when using a scraping cut. Under no circumstances should you operate this lathe at a speed which is too fast for your particular application.
NOTICE
Remember to choose the correct speed for your particular turning project. As a general rule, the larger the workpiece diameter, the slower the speed. Always start on slow speed.
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| To change speeds, the lathe must be on. | |||
Figure 24. Speed selector in slowest speed | |||||||
Attempting to change speeds without the | |||||||
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| spindle turning can result in damage to the | |||
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G1495 |