How to Design a Motion - First Steps.

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How to Design a Motion - First Steps.

Motion Design

It is always important to try to improve the design of your motion when you need to improve the performance of a machine.

First Steps

To design a motion:

1.Plan and sketch the Motion for the tool over one machine-cycle

Note on the sketch:

•the Motion name - usually relate the name to the tooling function or interaction with the packaging. Try to make it short.

•the key positions of the tooling

•each segment

•if a segment has a velocity requirements? - e.g. to track a pack during heat-sealing

•if a segment has a minimum time-periods? - e.g. for heat-sealing jaws

•if the motion-cycle is progressive (indexing) or non-progressive (rise and return)

•...

2.Use the Blend-Point Editor, set the position of each Blend-Point to zero, then close the Blend-Point Editor.

3.Use Insert-Blend-Point to split the motion into the number of segments you believe you need,- or delete segment

4.Use the Blend-Point Editor, to make sure the Match Control-Button for each Blend-Point is set to Do Match. If the motion is a progressive motion, set the Blend-Point #1 to Do NOT Match.

5.If a segment has a particular motion, e.g. Constant-Velocity, use the Motion-Law Selector to change the motion-law.

6.Use the Blend-Point Editor to define the approximate X-axis value of each Blend-Point and the Segment-Width for each segment. Begin to define the duration of each segment making some shorter and others longer. The total duration remains as 360°.

7.Edit the motion-values at the start and or end of each segment - using the Blend-Point Editor and Segment Editor - to fully satisfy the motion requirements.

There should not be any acceleration discontinuities.

If possible, avoid Jerk-discontinuities.

If possible, remove short Dwell segments. Try to replace with Zero Velocity, Acceleration, and Jerk at the Blend-Point.

8.Complete the motion design for all of the axes on a machine.

See also: What is a motion?