Sheetcam Hot Crack Fixed (EXCLUSIVE ⇒)

In fabrication, a hot crack isn't a bug—it's a feedback loop. And the hardest material to reprogram is always yourself.

SheetCam is a highly reliable software tool for CNC plasma, laser, and waterjet cutting, but software precision cannot completely override the laws of metallurgy. One of the most frustrating defects fabricators face when cutting metals—particularly aluminum and stainless steel—is the formation of hot cracks. Also known as solidification cracking, this issue occurs during the cooling phase of the thermal cutting process.

Never use a straight-line lead-in perpendicular to the part if you are experiencing cracking. Switch to an with a radius of at least 3mm to 6mm (0.125" to 0.25"). This allows the torch to smoothly transition into the cut path, distributing the thermal load across a curve rather than shocking a single point. Implement a Lead-Out and Overcut sheetcam hot crack

SheetCam is a software application developed for CNC plasma cutting systems. It provides users with a user-friendly interface to create and edit G-code files, which are then sent to the CNC machine for cutting. The software supports various CNC machines and offers features like automatic nesting, scaling, and mirroring, making it a popular choice among CNC plasma cutting enthusiasts and professionals.

If you are preparing parts for subsequent welding, general metallurgical practices should be combined with your SheetCam setup: SheetCam - Layers and the Contour Tool In fabrication, a hot crack isn't a bug—it's

What and type (steel, aluminum, etc.) are you cutting? What plasma cutter model and amperage are you using?

The job came in at 4:47 PM on a Friday. A rush order. 3/8" hardox, fifty parts. "No problem," Mark thought. He fired up , dragged the DXF into the workspace, and let the automatic path generator do its thing. One of the most frustrating defects fabricators face

If you cut a small internal circle first, then cut the large external perimeter, the entire outer edge stress will release, causing the internal circle to become an oval. If you cut all the small parts in one corner before moving to the rest of the sheet, that localized area will overheat, buckle, and ruin the cut quality. This is the "hot crack" dilemma. Plate preheating or post-heating are also common methods used in industrial settings to reduce thermal shock during processing.