Page 571 - Dormer
P. 571

GENERAL HINTS




       PROGRAMMING WITH Rprg


       •   For easy adjustment of the thread tolerance always program with radius correction
       •   The Rprg value is the start value for a new cutter and is printed on the cutter shank. This should be entered in the
          tool memory offset
       •   Rprg is based on the theoretical zero-line of the thread meaning that when you program using Rprg the thread is
          never oversize, but normally tight

       •   This means that with a small modification to the program co-ordinates you can create the thread to the required
          size




       RECOMMENdATIONS


       •   Always use the correct cutting data (refer to the cutting data chart on page 198)
       •   Use the recommended drill size for the thread diameter, as for conventional taps

       •   For easy adjustment of the thread tolerance always start with the Rprg value printed on the shank of the threadmill
       •   Use a gauge to check the tolerance on the first thread to establish if the radius needs to be corrected.  The radius
          can be corrected 2 or 3 times before the threadmill is worn out
       •   When dry machining, compressed air is recommended to help with swarf removal

       •   When threading more difficult materials, it is recommended to take 2 or 3 passes



















































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