Sheetcam Hot Crack ((top)) May 2026

Title: Understanding and Mitigating Hot Cracking in Sheet Metal Assemblies

• Solution: In SheetCam, add Micro-tabs (also called bridges or hold-downs). Keep 4-5 small tabs per part. These tabs physically hold the part in the cold sheet, providing a heat sink. Cut them manually later.

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

• Use the "Cut Rules" or "Operation Ordering" in SheetCam.
• Ensure internal holes are cut first, but allow for a travel move to a different part of the sheet before returning to cut the perimeter.
• Don't let the torch "nest" in one area for too long. Spread the heat across the sheet.

5. Post-Processor Thermal Logic

Thermal cutting methods like plasma and laser naturally leave residual stresses that pull at the cut edge. CUMIC Steel sheetcam hot crack

1. The "Lead-In" Revolution

Torch Height Control (THC)

: Improper torch height can cause excessive heat buildup. SheetCam includes "Cut Rules" to disable THC during tight corners or lead-ins, preventing "torch dives" that could damage the material or cause thermal stress leading to cracks. Title: Understanding and Mitigating Hot Cracking in Sheet