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To help troubleshoot your specific issue, could you tell me what and thickness you are cutting? If you know your current lead-in style or feed rate , share those as well so we can optimize your SheetCam profile. Share public link

A legitimate SheetCAM license is a one-time purchase that includes lifetime updates at no additional cost— to worry about. It provides access to a clean, safe, fully-featured version of the software with official support.

Key features include:

To prevent the "blow-out" or cracking that occurs at the start of a cut, SheetCam allows for customized lead-ins (arc, tangent, or perpendicular). By piercing the material in a waste area and moving into the path, the initial thermal shock—the most likely moment for a hot crack to initiate—is kept away from the finished edge. Overcut and Cooling Pauses:

When the plasma arc superheats a localized area (often exceeding 30,000°F), the metal expands rapidly. As the cut progresses and the torch moves away, that area cools and contracts. If the geometry of the part (or the hold-down method) prevents this contraction, the steel literally pulls itself apart. sheetcam hot crack

If your SheetCam toolpath commands the torch to stop moving at the exact same time it commands the torch to turn off, the torch will dwell in place while the arc fades. This injects excess heat into a stationary point, creating a larger molten pool and a higher risk of hot cracking.

Plasma power supplies require a fraction of a second to extinguish the arc after receiving the "torch off" command from the CNC controller. To help troubleshoot your specific issue, could you

Ensure the piercing height is higher than the cutting height to avoid damaging consumables and overheating the material surface.

But what exactly is it? Is it a software glitch in SheetCam? A post-processor error? Or a physical law of metallurgy fighting back against your torch? It provides access to a clean, safe, fully-featured