Furthermore, a two speed gearbox (16) is provided for adjusting the speed of the spindle.

The block will delay until the spindle reaches about 90% of commanded speed.

The block will delay until the spindle reaches about 90% of commanded speed.

The controller has a time constant-determining means (2) for determining a time constant in accordance with the speed of the main spindle.

The setting of spindle speed in machining: n=1000xv/(3.14xD)

The block is delayed until the spindle slows below 10 RPM.

The speed of the rod down the incline path is controlled, preferably by way of a tension or friction force against a later wall of the guide path.

The speed of the winding spindle is adjusted according to the position of the dancing arm in such a way that there is a uniform sag in the thread between the fixed thread guides (14, 15).

The spindle attachment device can transmit the rotational speed of the spindle to the tap tool after increasing the rotational speed to tap a work at high speeds while suppressing the rotational speed of the spindle.

A sensor is connected to the spindle motor to determine the rotation rate of the spindle.

This controller is adapted to stop the spindle in position according to a speed instruction that varies depending upon the speed of the spindle motor (2).

A spindle driver is coupled to the spindle to drive the spindle at a predetermined rotation rate.

It is assumed that the spindle motor is running under speed control.

Additionally, the current spindle power and/or the current radial load, along with the current spindle rotational speed may be received.

The constant evasive movement of the spool spindle takes place at a variable speed, the speed being predetermined for controlling the device, in accordance with the increase in diameter of the spool.