At first a Video from the handling:
Program start from SD card - Automatic tool measurement.
The simple construction of the reference sensor:
The shaft material is brass, this is softer as the milling tool and does not destroy them.
Different thickness of the material or different tools are not a problem for the reference sensor.
How do it works:
The Start sequence in front of the cnc program is always the same.
- Homing x and Y
- Go to park position over the sensor
- Homing Z Axis
- When the sensor touch the shaft, the Z Axis position is 26,0 mm from the top of the material.
- Lift mill from the sensor - time to remove the sensor
- Start milling program
Wiring and safety device:
Controller board und used Cam Software:
For my CNC Machine I use the BAM&DICE controller board, it based on Arduino 2560 and run with the Marlin firmware. My used Cam Software is Estlcam. It calculate the CNC program from the top side of the material.
BAM&DICE board Link: BAM Shield mit Arduino und vier mal DICE-STK - 2PrintBeta - 3D-Drucker, Entwicklung, Prototypen
The sensor work also with the 3D Print-Tool:
Reference sensor for CNC Tools
For the x and y Axis you set the zero point with a limit switch, but how can you get the zero position for the z Axis? You have different thickness of material to mill and when you change the tool, you have also a other z Axis positon. With the Sensor, you can define the zero position of the piece automaticly.
- Build License:
- CC - Attribution - CC BY