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Well, ideally, we don’t want to have to change the part program to handle the coordinates of each part position. What would a program for such a 4 part setup look like? This requires much less effort than swapping out ever single part as it is finished. This can speed up production as we can stick 4 workpieces in the vises, push the “Start” button, and not have to worry about it until the machine has finished 4 parts.
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For example, suppose we have 4 vises on the table capable of holding 4 parts for machining. They identify places in your machine’s work envelope (the range of positions it can move to) that are of interest.
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Why would we want to offset the coordinates to a work location? Think of work offsets as being like bookmarks. Why Offset Coordinates to a Work Location? After the prior steps in the pipeline, our coordinates have been converted to the proper units (Imperial or Metric), converted to absolute coordinates (via G90/G91 status) and now we’re ready to offset those coordinates to the actual work location. This chapter on g-code programming is all about G52, G54, G92 and related work and fixture offset commands. Recall the Coordinate Transformation Pipeline that is used to convert coordinates in g-code to the actual coordinates the machine is to move to:
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