Sheetcam Hot ((new)) Crack Direct

SheetCam isn't just a tool for generating G-code; it’s a tool for managing . By adjusting how the torch interacts with the material, you can significantly reduce the internal stresses that lead to cracking. 1. Optimizing Lead-ins and Lead-outs

When a torch finishes a closed loop (like a circle), it often leaves a small "divot" or a localized hot spot where the start and end meet. This is a prime location for a crack to propagate.

Use a "Leadin Type" of Arc in your operation settings. This provides a smoother transition for the plasma arc, reducing the sudden thermal shock to the boundary layer of the part. 2. Path Rules and "Overburn" sheetcam hot crack

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

Use SheetCam’s Optimization settings. Instead of cutting the "closest next" part, you can manually sequence the cuts or use a "keep cool" strategy. By jumping the torch to different areas of the sheet, you allow the material to dissipate heat, keeping the overall temperature of the HAZ below the critical cracking threshold. 4. Cutting Speed and Feed Rates SheetCam isn't just a tool for generating G-code;

Ensure your Pierce Delay is perfect. A delay that is too short causes the torch to move before the metal is molten, creating mechanical stress; a delay too long creates a massive heat "puddle." Conclusion

Use SheetCam to program a "pre-heat" or use specific path rules that avoid sharp 90-degree corners, which act as stress concentrators. Optimizing Lead-ins and Lead-outs When a torch finishes

Setting a small overburn (cutting slightly past the start point) ensures the metal is fully severed, preventing the mechanical "tearing" that happens when a part is forced out of the skeleton. 3. Heat Management through Cut Sequencing