Most machine tools have a Maximum Programmable Radius (MPR), usually limited by the controller format. The MPR can be entered into position 18 of the MM line as shown in these examples:
*...|16 |17| 18 |19|20
MM=...,1.5,1
,9999.999,1 ,0 (MPR
set to specific value)
*...|16 |17|18|19|20
MM=...,1.5,1 ,0 ,1 ,0 (MPR
set to zero will convert all arcs to feed moves)
*...|16 |17|18|19|20
MM=...,1.5,1 ,-1,1 ,0 (MPR
set to -1 removes any limitations)
The MPR should be entered in the same units as set in switch 1 of the MM line. If non-default units are used in a part program, the decimal place for the MPR will be moved up or down 1 place accordingly.