You can create a "Code Before" or "Path Rule" in SheetCam to modify the behavior as the torch approaches the end of the cut. "On all corners" or "Before end of cut." Action: Feed rate reduction.
To understand the defect, one must first define the mechanism of hot cracking. Unlike "cold cracking," which occurs after the metal has cooled and is often related to hydrogen embrittlement, hot cracking occurs at high temperatures, typically just above the solidus temperature of the material. As molten metal cools, it undergoes a transition from a liquid to a solid state. During this process, impurities and alloying elements with lower melting points—such as sulfur and phosphorus in steel, or silicon in aluminum—are pushed to the grain boundaries. These impurities form liquid films along the grain boundaries. If the thermal contraction stresses exceed the strength of these liquid films before the metal fully solidifies, the material separates internally, resulting in an intergranular crack. sheetcam hot crack
Let’s get into the practical fix. If you are currently suffering from a , open your operation settings and adjust these five parameters immediately. You can create a "Code Before" or "Path
SheetCam serves as the bridge between CAD design and machine G-code. Its configuration directly impacts the "Heat Affected Zone" (HAZ), where hot cracking is most prevalent. 2.1 Lead-ins and Lead-outs Unlike "cold cracking," which occurs after the metal
He saved the job as "HOT_CRACK_FIX.job" and shut down the PC.
The start and end of a cut are high-risk areas for defects. A "divot" or crack at the end of a cut often occurs because the torch dwells or slows down (M05 command), increasing local heat. What is hot cracking (solidification cracking)? - TWI