Sheetcam Hot Crack May 2026

Some SheetCam post-processors (like Mach3 or LinuxCNC) allow a "Thermal Dwell." You can edit your post-processor file (.scpost) to add G04 P0.5 (a 0.5 second pause) at every corner. This is tedious but effective for thick plate.

Sometimes a "crack" is actually just the torch piercing too close to the cut line or the kerf being set incorrectly. If the kerf width is too wide, the torch may sit on the edge of the material too long during the lead-in, creating a hot spot before the cut even begins. sheetcam hot crack

The Fix:

A hot crack is often a velocity issue. If your machine is set to decelerate abruptly into a corner, the plasma arc continues at full power while the movement slows down. This is the recipe for a blowout. Some SheetCam post-processors (like Mach3 or LinuxCNC) allow

The Fix: