Sheetcam Hot Crack !free! -

Moving too slowly pours excessive thermal energy into the material, widening the heat-affected zone (HAZ) and increasing contraction stress.

Do not use a straight lead-in. In SheetCam, navigate to the Cut path tab.

Understanding and Preventing SheetCam Hot Cracks in Plasma and Laser Cutting

Step-by-Step Solutions within SheetCam to Prevent Hot Cracking sheetcam hot crack

If you notice microscopic hairline cracks or visible fractures along your cut edges, systematically check the following parameters: Potential Cause SheetCam / Machine Fix Cracks initiating at the pierce point Severe thermal shock from direct pierce Switch to an with a longer radius. Cracks at the final corner of the part Heat accumulation from torch deceleration

Ensure your Tool Library in SheetCam is calibrated to your plasma cutter’s manual. You want the fastest travel speed possible that still maintains a clean cut. The faster the torch moves, the narrower the HAZ and the less time the metal spends in that "danger zone" where cracking occurs. Material Considerations

Thermal cutting methods like plasma and laser naturally leave residual stresses that pull at the cut edge. CUMIC Steel Moving too slowly pours excessive thermal energy into

(solidification cracking) that occurs during thermal cutting processes like plasma, laser, or oxy-fuel.

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

Hot cracking occurs at high temperatures near the solidus of the metal, typically when tensile stresses from shrinkage exceed the strength of the solidifying material. It is often caused by: Excessive Heat Input: Understanding and Preventing SheetCam Hot Cracks in Plasma

Understanding and Preventing "Hot Cracking" in SheetCam: A Guide for CNC Plasma Cutting

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