Because of the difference between the centre of the shaft and the cutting tip of the blade, the tip trails behind the centre and so the overcut needs to add an additional length onto the end of each closed shape to make sure that shape is completely closed. The effect of the blade offset means another correction is needed when cutting closed shapes, this is the overcut.
If the offset value is incorrect the quality of the cut is seriously affected especially on corners as shown in the diagram below. Tools such as engravers,embossers and pens, etc do not need an offset because the centre of the shaft is also the centre of the tip, so the offset value should be set to zero. The diagram below shows three different 60 degree blades with very different offsets. Each one has the same offset between the blade tip and the centre of the shaft. The diagram below shows these three blade angles all from the same manufacturer. There are other specialised blades which may have the same cutting angles but very different offsets because of their design for cutting particular types of media eg those which are thick and/or dense. The most common blade angles are 30, 45 and 60 degree. This value, usually given in mm, varies with the manufacturer of the blade used and is sometimes related to blade angle.
Offset is the distance between the centre of the blade shaft and the blade tip.
#Is overcut with signcut pro the same as trap software
Some machines have a fixed offset and you will not be able to alter them, but where the machine does allow for an offset value to be set in the software ensure you use the correct values in order to obtain the best quality of cut. Instead as the diagrams below show, the cutting tip is offset from the centre thus widening the cutting area of the blade and making it stronger. Most blades follow a set design where the cutting tip of the blade is not in the centre of the shaft because centralising the cutting tip would weaken the blade by mGaking the cutting area too thin and so shortening its life by making it more prone to snapping. Settings that affect the cut include the blade offset and overcut, the blade angle, the blade depth/extension, the force or pressure used, the speed, the carrier or backing of the media and the stickiness of the carrier. Some machines will only have a few settings, other machines will have many. Setting up your knife Every cutting machine will vary in the settings needed to obtain the best cutting results.
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