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In open-loop NC system the shaft of a stepping motor is connected directly to the lead screw x-axis of the machine table. The pitch of the lead screw is 3.0 mm. The number of step angles on the stepping motor is 200.

Determine how closely the position of the table can be controlled, assuming that three are no mechanical errors in the positioning system.

Also, what is the required frequency of the pulse train and the corresponding rotational speed of the stepping motor in order to drive the table at a travel rate of 100 mm/min?

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