Difference between revisions of "Damping Bender Corrections with VTube-LASER"

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So now VTube has two kinds of automatic damping. The first one reduces the correction by 50% in any of three sets of bender axis data (the Length, Rotation, and Bend).  It allows for this damping in each axis independently – so they can choose the appropriate axis to damp.  The second kind of damping is based on the previous adjustment values.  Using the previous value causes the correction to be reduced even faster if this kind of oscillation exists.
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====When NOT to Use Damping====
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Damping is not helpful if your tube does not have the characteristic shape shown above.   If you tube does not have short straights that are basically "jogs" or offsets in longer sections of tubes, then you should turn damping off by unchecking the damping check boxes and/or ignoring all damping report data.
 
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Revision as of 23:24, 5 February 2013

Vtube-laser logo.jpg

Back to VTube-LASER

Damping Bender Corrections

Vtube-laser 1.77.3.jpg




VTube-LASER can automatically damp correction data in order to avoid oversteer.

When to Use Damping

Two adjacent 90 degree bends that are close to each other followed by a long straight causes VTube (and other measuring solutions) to overcorrect the end of the long straight. The end is supposed be corrected to the middle straight (the MASTER) like this:

Vtube-automatic proper correction tube swing.jpg

But what this tube configuration does often is a wag-the-tail oscillation in the correction loop like this:

Vtube-automatic proper correction tube swing too much.jpg

The result is the correction causes the leg to overshoot the target.

Two Kinds of Damping

VTube has two kinds of automatic damping. The first one reduces the correction by 50% in any of three sets of bender axis data (the Length, Rotation, and Bend). It allows for this damping in each axis independently – so they can choose the appropriate axis to damp. The second kind of damping is based on the previous adjustment values. Using the previous value causes the correction to be reduced even faster if this kind of oscillation exists.

Vtube-autocorrectiondamping green curve.jpg

When NOT to Use Damping

Damping is not helpful if your tube does not have the characteristic shape shown above. If you tube does not have short straights that are basically "jogs" or offsets in longer sections of tubes, then you should turn damping off by unchecking the damping check boxes and/or ignoring all damping report data.

Vtube-autocorrectdamping pulldownbox.jpg