As the worm drive has many advantages

widely used in production and life

therefore the worm processing（especially multi-start worm processing） is a very important in the field of machinery manufacturing.Because the worm has the larger tooth profile

the deeper tooth depth

the larger cutting area

it happen the problem of shake

breaking off

breaking edge

and drop-dead halt in the cutting process easily.And it is similar in CNC lathe.It does not have specifical instructions for worm processing in Fanuc 0i-mate system

lead to error of process routes in cutting

and not cutting reasonably and efficiently.It write NC program with custom macro program for multi-start worm

resulting in achieving processing routes

and realizing reasonable and efficient processing.