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: Slow travel speeds that allow heat to build up in a concentrated area. Improper Lead-ins

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. sheetcam hot crack

When setting up your operation, ensure your toolpath is configured to cut all internal contours (holes and slots) before tackling the external profile. While SheetCam's thermal distortion mode generally handles this well, you may need to manually adjust if you are working with extremely thin gauge metals or very detailed parts. Sometimes, breaking the operation into separate layers (one for holes, one for the outline) gives you ultimate control over this sequence. : Slow travel speeds that allow heat to