Instructions on CNC offsets

1.Take the appropriate measurements of all the dimensions on the part while it is still in the machine. This way, you can re-run the line that
controls the tool for the operation that is out of tolerance. Measure using go/no-go gauges, calipers and micrometers and always measure
critical dimensions twice to make sure you have the correct reading.

2.Inspect the tool that is having the wear issue. You will need to know the tool position in order to make the correct offset change on the control. Look at the tool carefully and inspect for chipping or broken  edges. If there are either, change the tool immediately; otherwise,
simply make an offset change.

3.Call up the offset page on the computer control. This will vary greatly depending on the type of machine as well as the brand name. Most
tool offset pages are contained in a sub-page of the main tool section.

4.Change the offset for the diameter of that particular tool accordingly. Changing a diameter offset will make the cut more or less that of the noted program dimension. For example, if the cut was supposed to be .250 of an inch and was .251 of an inch, you would input -.001 to the diameter offset by entering that in the space for the offset dimension.

5.Change the offset for the length of that particular tool accordingly.Changing a length offset will make the cut more or less deep that the
noted program dimension. For example, if the drilling operation or depthof a hole was supposed to be .250 of an inch and was .251 of an inch,
you would input -.001 to the length offset by entering that in the spacefor the offset dimension.

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