Lenze DSD Manuel d'utilisateur télécharger pdf (Page 100)

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101

7Applications

7.6 Spindle drive

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Lenze · Drive Solution Designer · Manual · DMS 4.2 EN · 12/2013 · TD23

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7.6 Spindle drive

The vast majority of positioning systems require linear movements. If a rotating drive is used, the

rotation of the motor has to be converted into a linear movement. The speeds that can be achieved,

and therefore the dynamics of the positioning process and the repeat accuracy, and thus the quality

of the positioning process to a great extent are defined by the mechanics.

Characteristics of a spindle drive

• A motor (if required with a gearbox) actuates a spindle that moves the spindle slide with the

load.

• Spindles are used for a high positioning accuracy and low speeds. The positioning path is limit-

ed.

• For the accurate adjustment of limit stops and the accurate positioning of the workpiece in pro-

duction machines, spindles are generally used.

7.6.1 Calculations

For a spindle drive according to the drawing the following applies:

First the leadscrew pitch is converted to a resulting radius.

[7-51] Equation 1: Resulting radius of the spindle

The moment of inertia of the spindle can be determined if its geometry is known.

• The following, for instance, applies to a solid cylinder:

[7-52] Equation 2: Moment of inertia of the spindle

Res

Spl

2000 π⋅

---------------------

add

32 1000

⋅

---------------------------

Spl

ρ⋅⋅⋅=

1 2 ... 95 96 97 98 99 100 101 102 103 104 105 ... 495 496

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Lenze DSD Manuel d'utilisateur Page 100

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