Tool setter function, measuring and compensating the tool offset value in five directions, can effectively eliminate the error and inefficiency caused by the setting of the hand tool. No matter what kind of cutting tool is used to turn or mill the contour of the workpiece, all the points of the tool tip or the axis lines of the tool involved in the cutting must be adjusted or compensated so that they are accurately placed at the same theoretical point or axis of the workpiece coordinate system on-lineHow to use:1. The alligator clip is fixed on the cutter2. port has been connected to the control board (A5 interface on the 3018pro control board)3. Space (Plastic + Aluminum Plate) Under Tool Material: Plastic Color as shown GRBL Z-Probe Tool for CNC Milling Machine Auto Tool Setting. Thickness: 1.6mm ( 0.03mm)The tool setting function can accurately locate the work surface and is most suitable for PCB engraving. Easy to use, you can refer to our video to understand how to use it correctly. Replace the probe in Grbl with: G91G21G38.2Z-30F100; G92z1, 6; G0Z5F10Co G91G21G38.2Z-30F100; G92z1, 6; G0Z5F10 means:G91: use relative coordinate modeG21: use the unit mmG38.2: tool setting instructionZ-30: the Z axis moves 30mm in the negative direction, if it touches the tool setter, it will stop and set this point as the originF100: