Zero point adjustment
You can now perform a fine adjustment of the zero point, e.g. with the paper method as described in the “Set the Zero Point” chapter. If your piece contains blind holes or pockets and you need to precisely define what the depth should be, you must of course subtract the thickness of the paper from the Z-coordinates offsets.
When you know this thickness, (e.g. measure it with a callipers) you can bring down the Z-axis slowly and carefully and then press the Zero Button for the Z coordinate once more.
However, it is better not to risk any tool breakage and simply enter the figure directly. First, double click on the Z coordinates display and enter for example “0.1” in the pop-up window which appears. The zero point will then be 0.1mm deeper than the current position of the cutting tip. This also prevents any risk of the surface of the material being scratched.
When the zero point is correctly set, the graphical display of the tool path is represented as expected and there are no further error messages in the message windows, you may start the program. The button (4) to do this can be found on the main page (“program”) on the left below the graphic window.
In the event that an error message is displayed, or the text display (the “program” window below the graphic) is not displaying program start, it may be that the Start Button is locked (greyed out). In this case, you can first click on “rewind” (9), then the text display will jump to the Start program and the Start Button should be active again.
Before starting a new program for the first time, it is recommended that the Feed Override (Slide control bar “Feed %” above right) be set at a low value (e.g. 10-20%), so that the machine runs slower. If you have made a mistake while setting the zero point, or the wrong tool is in the spindle, or the machine makes an unexpected movement at the wrong position, then one has time to react to a potential collision.
Press the Stop Button (<) to stop the program, or in an emergency you can of course press the Emergency Button on the machine. If everything goes to plan and functions without problems, then you can set the Feed%-Slide control bar back to 100%.
Problems? Stop as soon as possible
If you encounter problems while processing, e.g. the tool is covered in shavings, or the tool breaks off and has to be changed, you can stop the program being carried out at any point, by pressing the Stop Button. After a short delay, when the spindle motor comes to a standstill, the Start Button will become active once more. After you have resolved the problem, you can continue to work again on the same spot.
If the tool has broken, it is possible that the control has allowed a part of the program to continue, while the (broken) tool was not in position. In order to retain the entire tool path, you will have to rewind this part of the program.
According to how far along the program has run after the breakage, you can scroll up a few rows in the text window to the desired row and mark it by double clicking. The Start Button on the left will be deactivated (greyed out) and the second button (4N…) on the right will become active. If you use this button to start, a window will appear containing a warning as the image on the right shows.