Sureway Metals Success Story

Good Day Bob, Per your request I have listed my qualifications and my comments about the nests created with Sigmanest that UMC sent to Geoff Prince. My name is Don Smith, I have been a CNC programmer and machine operator at Sureway located in Canada for 24 years. My specialty is in both laser and plasma programming. After reviewing the Sigmanest pictures, I have several comments about why I would never cut a nest like this with a plasma or laser machine. . ASSIGNING OF LEAD-INS AND SEQUENCING OF A NEST ARE CRITICAL COMPONENTS OF CUTTING. . IN-ACCURATE PARTS - picture #1, sequence #13 Cut sequence #13 like many others parts will likely warp because the lead-in is located in the top left corner of the part. When the heat is trapped in the part and there is no where for the heat to go, the part moves and will become bad. . LOSS OF CUT BECAUSE OF HEAT- picture #1, parts 4, 11, 13, 16, 21, 27, 32 and more. As the torch cuts the left side of sequence # 13 the torch is likely to lose the cut as the part becomes hot and there is no material left between cut sequence 11 and 13. Picture #1 - Issues with the lead-in locations.