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Not only does kerf width vary from one process to the next, but there are lots of things that affect the kerf width for each process.
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The more precise processes, like waterjet and laser, remove a smaller amount of kerf, which is one of the reasons they can be more precise! A typical example shown here is for 1/2” thick mild steel. That is why the kerf value is often referred to as “kerf offset”.Įach cutting process removes a different amount of material, or kerf. Most modern CNCs take the actual kerf amount and automatically offset the tool path by 1/2 of that amount, so that the finished part comes out very close to the programmed dimensions. Rather than re-program the part at a different dimension, the CNC will take care of this automatically just by telling it which direction to offset, and by how much. So the actual tool path has to be compensated by 0.100” to the side of the programmed path, all the way around the part.
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So if you program a 6” by 6” square, and the plasma arc removes 0.200” of material, as it cuts, then the resulting part is going to be 5.8” by 5.8”. When cutting parts on a CNC plasma or laser machine, you want to produce accurate cut parts, with final dimensions as close as possible to the programmed shape. The “cut angle” on the edge of the part makes measuring the kerf width sorta tricky, but for consistency, the word “kerf” should only be used when talking about the actual cut width. Over the years I’ve heard some people use the term when referring to the angle on the edge of the part, but that would be an incorrect use of the word. When talking about CNC shape cutting with typical cutting processes, kerf is the width of material that the process removes as it cuts through the plate. It was originally used to describe how much wood was removed by a saw, because the teeth on a saw are bent to the side, so that they remove more material than the width of the saw blade itself, preventing the blade from getting stuck in the wood.
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Employment Opportunity / RFQ (Request for Quote).Kerf is defined as the width of material that is removed by a cutting process.The system will work on very gentle rises like on thicker material and at much lower feedrates. Think about flying a drone at 6 ft above the ground over hilly county and your feedback is delayed by 1 sec! Factor in the added delay of the Proma that uses relays on the Up and DOWN and you will be luck to get stable operation at 30 IPM or less. The pure speed of MACH THC keeps practical response down to about 60 IPM in Z speeds on a fast Z. It's just not capable of responding or moving fast enough to keep up with warps while you cut at over 200 IPM. Once you have it working you will be disappointed in the ability to cut the thin stuff.
Offsets in sheetcam plate marker code#
The code should seek the home swtich closure (from touching the metal and moving the torch up and the g code sequence in the POST should lift it first to the top of the material (switchOffset distance), then up the programmed Pierce Height have defined in SheetCAM, fire the torch and then plunge down to the defined Cut Height value. You need to use a POST (like the THC 300 or the MP1000-THC) that is setup for the auto touch off sequence.either the G28.1 or the G31 probe sequnce.