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num parameter manual - Documentation CN

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8.15 Spindle Acceleration and Minimum Spindle Reference P62<br />

in Hole Bottom<br />

Remark: Concerns only rigid tapping.<br />

Description<br />

8 - 32 en-938818/4<br />

Category Spindles<br />

Type 1 Signed decimal<br />

No. of words 4<br />

Used to define the spindle acceleration and minimum spindle speed reference in the hole bottom for spindles 1 and 2.<br />

Spindle 1 Word N0<br />

Spindle 1 Word N1<br />

Spindle 2 Word N2<br />

Spindle 2 Word N3<br />

Word N0 and Word N2<br />

The value A set in these two words defines the deceleration distance in the hole bottom for spindles 1 and 2<br />

respectively.<br />

A is in revolutions per s 2 .<br />

The deceleration distance (D) is given by the equation:<br />

where:<br />

- Pitch = tap pitch<br />

- S = spindle speed<br />

D = Pitch x S 2 /2 x A x 60 2

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