Establish zero point
Zero point video, offsets, jog mode
Where to set zero point?
Before starting a program, you need to tell the control software where the workpiece is located in the machine. This can then be set to be the zero point. The zero point on the workpiece depends on the drawing. On the Sample.din file, the zero point is located in the lower corner at the drawing level.
Zero point for round and symmetrical parts
If the part is round or symmetrical, the zero point may be located in the centre. In the Z-direction, the zero point is usually located on the upper edge of the workpiece, so that the positive Z value is located above the material, the negative represents the plunge depth into the material. In some applications, placing the zero point on the underside of the material may make sense, in order to make the programs and settings dependent on the material thickness.
In the following description assume the zero point is set on the upper side of the material. The subject will be dealt with in greater detail later. The following example merely illustrates the fundamental understanding.
Switch to the “Settings” page where the buttons with arrows are located.
Clamp a workpiece (e.g. a sheet of plywood) on the machine’s machining surface for practice. Briefly press the arrow pointing to the right.
In the event no reference drive has been completed, a dialogue with a warning will appear. Select “Reference drive now”, in order to perform a reference drive. Manoeuvre with the buttons in the X and Y direction, so that tool is now located above the workpiece. Now you can lower the tool, until it is about 10 mm above the upper edge.
The speed should now be lowered. Go to the list and click on the speed “100.0 mm/min”. Now carefully lower until the tool is only a few millimetres from the surface of the workpiece. Reduce the speed further to 10mm/min. Now place a sheet of paper on the work piece.
Carefully lower further until the paper can no longer move and the paper is clamped beneath the tool. Now press the “0” button next to the Z coordinates display. The coordinates are then set to zero.
Set the speed back to 1000 mm/min and use Z to move a few millimetres upward. You can now use the X and Y to move the tool over the left (X) lower (Y) corners and then set both these axes to zero. Now the X and Y coordinates should both be zero and the Z coordinates display a few millimetres (positive).
Be careful as the tool approaches the workpiece, the machine table or another object. You can stop the movement by releasing the button at any time. When the material is particularly hard and the tool sensitive a few 1/100mm too much can cause a tool break. Please use a workpiece made from a softer material, such as wood or rigid foam for practice.
The zero point symbol
If a program is loaded, every change to the zero point triggers an update to the graphic display with the tool path.
The location of the zero points in the machining area is displayed using the tripod with three coloured arrows.