I have a crossfire with a new Hyperthem XP Sync 45 Machine torch. Using Fusion360 to model, then import into sheetcam. I finished setting up the machine with the new torch but having issues with Actual part size VS model size.
If I cut a 30mm Square, actual dims are 29.3 x 29.3 This is consistent with material thicknesses 1/8", 1/4", and 3/8" Mild steel.
Made sure that the offset is correct, my toolset is new in sheetcam, using Hypertherms cut charts for Pierce height, Speeds, and Kerf. I checked to make sure that the XY Travel is correct i.e. a 1000mm travel equals 1000mm in actual distance.
Anything else I can check?
EDIT: After reading some similar posts, maybe its Fusion360? However, I use Fusion extensivly for 3D modeling and get perfect prints. Could this be a DXF export issue? Is there a way to check geometry in Firecontrol?
This is definitely caused by an incorrect kerf setting in the Sheetcam tool. The kerf width is what the program uses to determine the amount to offset the torch from the line. If your kerf value is to small, the torch will not be offset far enough and your part will be undersized.
Think of it as if you set up a machining operation with a 1/4” tool, but ran a 3/8” tool instead.
You can either make a cut and measure the actual kerf width or experiment by changing the value in the tool and making test cuts.