#### Uses for Looping

There are three main uses for the looping option:

- You have a multiple part fixture that holds a grid of parts. The fixture should use consistent spacing between the rows. The translation / rotation offsets allow you to index from one part to the next in the grid of parts.

- You have a fixture that holds one part and you want to swap in a new part before each loop of the program. A COMMENT command is helpful to stop the CMM when the part is being replaced with a new one. The command can be at the beginning or end of the loop.

- You want to use the LOOP option to rotate the part program to measure a different portion of the same part. For example, you could create a part program to measure a complicated hole pattern that was duplicated 10 times on the part. Your part program would only need to measure one of the hole patterns. The LOOP option could be used to offset this part program to measure the other 9 occurrences of the pattern.

Note: If you're using an alignment inside of a loop PC-DMIS 3.6 and above allows you to use the active alignment in the ALIGNMENT/START command line instead of always recalling a previously stored alignment. See the "Using an Alignment Inside Loops" topic in the "Creating and Using Alignments" chapter.

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To Use Looping: