Difference between revisions of "VTube Reverse Calc from MIL-D-9898C Absolute Bender Data to Centerline XYZ Data"
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− | This military spec bender chart data chart can converted by VTube-STEP and VTube-LASER in the LRA grid section of the Part Data menu. (As of version 2.7)<br><br> | + | This military spec bender chart data chart can converted by VTube-STEP and VTube-LASER in the LRA grid section of the Part Data menu. (As of version 2.7) No new designs are created with this spec.<br><br> |
− | This specification was created decades ago when CONRAC benders were popular with the military. CONRAC benders have been obsolete for decades, but legacy tube shape data is still | + | This specification was created decades ago when CONRAC benders were popular with the military. It was made inactive account to NOTICE 1 on January 21, 1986.<br><br> |
+ | CONRAC benders have been obsolete for decades, but legacy tube shape data is still stored with this specification. | ||
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Revision as of 23:01, 26 January 2017
This military spec bender chart data chart can converted by VTube-STEP and VTube-LASER in the LRA grid section of the Part Data menu. (As of version 2.7) No new designs are created with this spec. |
General Principals for the Military Specification
This bender data spec uses ABSOLUTE LENGTHS between bends as if they were derived from a tape-measure attached to the Feed axis of a bender. CONRAC benders had tape measures riveted along the rail of the carriage that moves along the length of the bender. The lengths indicate where each bend begins. |
The bender data uses ABSOLUTE ROTATION data (twist angle between the planes of the bends). It is absolute because it always depends on the rotations in all preceding bends accumulated. The dial on an absolute rotation spindle reads from 0 to 360. The dial puts all rotations at the top of the dial. It starts with "0" at the top of the dial.
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