Übersetzung für "Schleppfehler" in Englisch

This results in vibration, rough running and drag errors during machining processes.

This is generally referred to as a tracking error.

In this way, a contouring error can be advantageously reduced.

In particular it is possible to preferably compensate for the contouring error for certain frequencies.

Rates of change of the setpoint which result herefrom however can lead to a so-called contouring error.

The draging error occurring therefore increases with increasing speed of the body to be monitored.

This parameter is referred to as dynamic contour error.

This pre-control eliminates the following error otherwise associated with master movement.

It then becomes necessary to accept a drag or timing error or to limit the noise power.

A consequent disadvantage here is that so-called lag errors arise in PLL circuits with changing angular velocities.

In order to reduce the contouring error or to compensate for it, there is the pilot control or pilot control apparatus 12 .

The drag error means a trailing of the actual position as compared with the desired position that is due to control technology.

The drag error increases in a typical manner upon a step-like rise of the resistance put up against the plunger.

As is generally known, this trailing of the actual value is also called drag error for electronically controlled linear motors 6 .

As a result of this calculation, a correction signal is calculated, taking into account lag errors and start-up disturbances.

The advantage of this feature is to produce the largest possible radius for the second grinding disk, which is capable, even with allowance for dynamic effects (i.e. possible drag defects), of grinding away the concave curvature region without geometrical errors.

Furthermore, owing to use of a predictive control, it is ensured that all lag errors of the linear displacement device 40 are taken into account and hence at the respective point in time K·(?T) the tool 36 lying in the cutting plane 46 precisely assumes the X-position predetermined by the contour 216.

This type of calculation of the actuating signal is referred to as predictive control and makes it possible to correct a lag error of the respective X-axis drive in a simple and precise way so that the tool is always standing exactly in the position in which it should stand in accordance with the respective actual C- and Z-position value at the respective point in time.

Usually, the loop is formed in a manner such that with low signal noise levels the drag error is still tolerable and a high noise signal level does not produce self-excitation of the loop.

However, in this system, the z coordinate of a measurement point determined on the measurement object is affected by a so-called contouring error.

Taking this prior art as a departure point, the present invention is based on the object of providing an apparatus for measuring a measurement object contactlessly in which the contouring error explained above is avoided or at least significantly reduced.

As a result of this, the contouring error described above is obviated, provided that the light reflected from the measurement object is received by the receiver device within the measurement window.

In contrast to the conventional measurement apparatuses described in the introduction, however, the continuous readjustment of the focussing is obviated, so that the above-described contouring errors can be avoided or at least significantly reduced.

Owing to the relatively low rotational speed of the workpiece, slip errors, that is to say deviations between the desired and the actual position, during the movement of the workpiece are relatively low.

In this case, geometric variables relating to rotating machine elements are included in the respectively involved drive regulators, and minimize the slip error.

This contouring error arises because the mechanical readjustment of the position of the optical sensor in the z coordinate direction is not exactly contemporaneous with the reading command of the receiver device, i.e. the receiver device reads out a measurement value for the z coordinate which does not precisely correspond to an exact focussing of the measurement object.

In conjunction with the electronic commutation and the digital position pick-up 34 in FIG. 3, the drafting arrangement drive has an extremely high accuracy of position without lag errors, such as occur e.g. in asynchronous motors or reluctance motors energized via a frequency divider as initially mentioned.