Software optimization must be paired with proper machine setup and material handling to be fully effective. Gas Selection and Consumables
To make sure I’m giving you exactly what you need, I have to ask for a quick clarification. "Hot crack" in the context of (the CNC software) usually points to one of two very different things:
The most effective way to eliminate a hot crack is to use the feature in SheetCam. An overcut instructs the torch to continue moving past the starting point of the cut along the waste side or the perimeter line before turning off. sheetcam hot crack
Use the "Edit Start Points" tool (the S icon) to manually move pierces away from sharp corners or structural stress points on the part. Implement Heat Dissipation Strategies
When a CNC machine approaches a sharp corner, the gantry naturally slows down to change direction. This deceleration causes a spike in heat input at the corner, often leading to a corner hot crack. Software optimization must be paired with proper machine
Hot cracking occurs when a metal—most commonly aluminum or high-carbon steel—is heated to its melting point and then cools too rapidly or under too much physical stress. As the weld pool or cut edge solidifies, the shrinking metal pulls apart, creating a "crack" while the material is still at elevated temperatures.
CNC plasma and laser cutting have revolutionized metal fabrication. They deliver speed, precision, and repeatability. However, fabricators often encounter thermal defects that can ruin expensive workpieces. One of the most frustrating issues is hot cracking, particularly when it occurs near the start or end of a cut configured in SheetCam. An overcut instructs the torch to continue moving
SheetCam gives you granular control over how the CNC torch behaves. You can leverage specific software settings to manipulate heat input and stress distribution to mitigate cracking. 1. Optimize Lead-Ins and Lead-Outs
Worn nozzles or swirled rings distort the plasma arc, causing an asymmetrical heat distribution. Replace consumables regularly.
Several factors can contribute to the occurrence of hot cracks when using SheetCam:
What and CNC control software are you using?