View source for End-Scan Using a Ball Probe

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How to perform end-scans with a ball probe.<br><br>
* Back to [[VTube-LASER]]
* See [[End-Scan Technique Research]]
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===Why the End-Scan technique is important===

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This end-scan method is useful for situations where the only option is a ball probe - or where the Laser cannot reach effectively - but a ball probe can.
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Using a ball probe is very precise as long as the tube is properly held with a work holder.  
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The main drawback with this method is that the tube must be securely mounted without deforming the shape.  It must also be touched - thereby potentially moving the tube - which will invalidate most measurements.)

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==Measure Setup - For Measure the End Wall==
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* Set Part Setup - Set the A-End Diameter to the diameter where the measurement will be taken. 
* Set Measure Setup - LASER Tab: The LASER defaults to OFF for at least END-SCANS.
* Set Measure Setup - TACTILE Tab: Uncheck the Continuous Scan on Tactile End-Scans.
* Set Measure Setup - TACTILE Tab: Set the Offset for each end to "TOWARD BEND" if the measurement is on the end wall.
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===How To Use This End-Scan End Wall Technique===

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* Align the probe the end of the tube as shown in the diagram below - take two points per quadrant.<br><br>
* Press and release the green button for each measure.<br><br>
* It is not necessary to take all four quadrants.<br><br>
*Press the RED button when you are finished collecting data.<br><br>

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[[image:EndScan_ProbeQuadrants.jpg|300px]]
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===How to Overcome Trouble With End-Scans===

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* Check the A End diameter to be sure it is close to the actual diameter.<br><br>
* Open the end-scan tolerance in the MEASURE 2 tab of the Systems Option menu.  The default value is 0.039" or 1 mm.  You can open this tolerance as high as you wish - for example you could set it to 0.250" (6.35mm) or higher and always get a qualified end.  When you increase the tolerance, just take more care that you are collecting good end points.<br><br>
* With tactile scans, it is possible to backup if you feel you have collected a bad point.  Just press the button for "Red Button Removes Points" in the measure collection window, and press the red button.  Then toggle the switch off to continue measuring. 
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[[image:EndScan_Tolerance.jpg|300px]]
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==Measure Setup - For Ends That Move Into A Surface==
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* Set Part Setup - Set the A-End Diameter to the diameter where the measurement will be taken. 
* Set Part Setup - Set the A-End or B-End Offset project the tube end point to the master end point location.  A negative number projects toward the adjacent bend.  A positive number projects away from the adjacent bend. 
* Set Measure Setup - LASER Tab: The LASER defaults to OFF for at least END-SCANS.
* Set Measure Setup - TACTILE Tab: Uncheck the Continuous Scan on Tactile End-Scans.
* Set Measure Setup - TACTILE Tab: Set the Offset "AWAY" if the tube end is moving into a surface.
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===How To Use This End-Scan End-Into-Surface Technique===

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* Align the probe the end of the tube as shown in the diagram on top of the end surface.<br><br>
* Press and release the green button for each measure.<br><br>
* It is not necessary to take all four quadrants.  However, more are better if possible.<br><br>
*Press the RED button when you are finished collecting data.<br><br>

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[[image:EndScan_ProbeQuadrants_EndIntoSurface.jpg|300px]]
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===Other Pages===

* See also [[End-Scan Using the End Wall]]
* See also [[End-Scan Using End Targets]]
* Back to [[VTube-LASER]]