How to Design a Motion - First Steps.

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How to Design a Motion - First Steps.

Motion Design

The first step you should take when you need to improve the performance of a machine is to try to improve the motion-design.

See also: What is a motion?

First Steps

1.Plan and sketch the Motion for the tooling, ideally on graph-paper, over one machine-cycle

Note on the sketch:

The Motion's name - usually relate the motion's name to the function of the tooling or the interaction with the packaging. Try to make the name short.

The approximate timing of each Blend-Point on the X-axis.

The approximate position of each Blend-Point on the Y-axis.

When a segment has a velocity requirement - e.g. to track a pack during heat-sealing

When a segment has a minimum time-period - e.g. for heat-sealing jaws

2.Use the Blend-Point Editor, to set the Y-axis position value of each Blend-Point to zero.

3.If you need more than four segments, use the Insert-Blend-Point command to split segments into the number of segments you believe you need - or delete a segment if you need fewer than four segments.

4.If the motion is a non-progressive (Rise-Return type) motion, use the Blend-Point Editor to make sure the Position Match Control-Button of Blend-Point number #1 is active.

5.Use the Blend-Point Editor to make sure the Match Control-Buttons are active for Position, Velocity, Acceleration for each Blend-Point - to make sure there is motion-continuity to at least Acceleration.

6.If the motion is a progressive (indexing type) motion, set the Match Control-Button of Blend-Point #1 to “Do NOT Match”.

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

8.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. The total duration remains as 360°.

9.Edit the Y-axis motion-values of each segment with the Blend-Point Editor and/or Segment Editor - to fully satisfy the motion requirements.

10.Make sure that none of the segments give a large spike in Acceleration compared to the other segments.

11.If possible, remove short Dwell segments. Try to replace a short Dwell segment with a Blend-Point that has zero Velocity, Acceleration, and Jerk.

12.If possible, avoid Jerk-discontinuities.