Tutorials: Orientation of gcode

• This is an example on how to orientate the g-code to fit the object present in the machine.
• For testing I’ve placed at a random position and orientation, a PCB that I made some time ago.

• Switch to the camera system, by clicking the “Switch” button on the ribbon.
  The button creats a virtual offset with G92 on the present workspace as the centre is moved
  to the camera location.
• By switching back to the spindle, the offset is cancelled with a G92.1 command

• Change to the “Probe -> Probe” tab
• In the PCB the holes are 0.6mm, so I set the Diameter to 0.6mm
• Jog the camera to a known location. In this example I’ve used a couple of drilled holes.
• Click on the Orient -> Add button
• Click with the mouse to the line on the centre of the hole.
  Note: there is a snapping mechanism in bCNC, that will snap to the closest gcode control point

• Jog to the 2nd marker

• Zoom and align the camera on the second marker
• In this quick example I had to make steps of 20um to align the holes

• Click on Orient->Add
• Click on the second marker gcode point on the canvas

• Repeat with a 3rd marker

• Add the 3rd marker
• Note: 2 markers are sufficient, but the more you provide the more accurate the system is going to be determined. bCNC is solving an overdetermined system to find the best match.
• Note: always observe the error for each marker. If too high, you can move the marker with the mouse or delete and add again.

• At this point clicking on the Orient -> Orient button the gcode will be transformed to match the markers.

• I’ve changed the location of the Camera display from Bottom Right to Gantry so that the camera image
  follows the gantry location when displayed in X-Y

• Inspect some points and see the camera image with the gcode overlay.
• Note: The image distortion from the macro focusing is visible. The gcode is matching close to the
  center but at larger distances is distorted.