Motor Drive for Machine Tools: With a Chapter on Wiring for Motor-Driven Machinery (Classic Reprint) - Softcover

Inhaltsangabe

Excerpt from Motor Drive for Machine Tools: With a Chapter on Wiring for Motor-Driven Machinery

Just here it may be well to point out one of the greatest advantages of the motor drive. It will be noticed that the belt drive, which gave a range of 75 to 580 revolutions, did so in five steps varying by at least 60 per cent per step. If the lathe is running on, let us say, the fourth step it may be found that the cutting speed, owing to the size of the work or the condition of the tool, is not as high as could be used to best advantage. To jump to the next speed, however, increases the cutting speed over 60 per cent, which will be too much.

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