Motion Design: Tutorial 1: Indexing Motion

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Motion Design: Tutorial 1: Indexing Motion

Indexing Motion

This tutorial designs an indexing motion.

After this tutorial you should be able to:

delete segments

make sure the Motion-Width is 360­º

change the motion-law of a segment

edit the X-axis value of a Blend-Point

edit the Y-axis Position of a Blend-Point

Terminology and Index Motions

Index Motions usually have two segments:

SEGMENT 1: Index Segment.

We must specify its:

Index-Period:  the rotational angle of the input-shaft (X-axis) as the output shaft also rotates

Index-Angle: the rotational angle of the output-shaft (Y-axis) during the Index-Period.

Motion-Law: the mathematical function for the rotational angle of the output-shaft as a function of the rotational angle of the input-shaft .

SEGMENT 2: Dwell Segment.

We must specify its:

Dwell-Period: the number-of-degrees the input-shaft rotates during the dwell segment.

Dwell Period = 360 - Index-Period


Note:

When you design a 3D-Cam, it is frequently better to use three segments : Dwell–Index –Dwell,  to be symmetrical at 180° (360/2).

Period = Time-Period, Duration, or Interval.


Video : Motion Tutorial 1: Design an Indexing Motion

 

Motion Tutorial 1: Design an Indexing Motion

 

btn_delkeywordStarting from the Default Motion
btn_delkeywordEdit the Y-axis units
btn_delkeywordDelete Two Segments
btn_delkeywordEdit the Motion-Law and Blend-Points