A compilation of the best practices when using the Cobalt.
- Do not uncheck 'Use Arms as Mouse'
- Always have Wi-Fi turned off when using the Cobalt.
- When using the Range Finder, make sure to turn it off before scanning with the Cobalt.
- A "Lens Set" consists of 3 lens (2 camera and one projected lens).
- Left and right camera lens are interchangeable, but correct project lens must be used in coordination with required FOV of the camera lens.
- Compensation must be run whenever lens are changed.
Home - Returns the rotary table to the home position (the initial position it was at when powered on).
Align - Performs rotary stage alignment when relationship between rotary table and Imager has changed.
Range Finding - Used to set standoff distance from Imager to the artifact. Must be immediately turned off after setting distance.
Targets - Enables targets to be captured as single points for auto-alignment as well as aiding alignment.
Exposure Color Mapping - Colors live image with blue. For areas underexposure and red for areas over exposed.
Rotary Table Registration / Calibration & Alignment
- When the rotary table is properly aligned and the point cloud rotary table wizard is used, 360 degrees of an artifact can be scans and pre-aligned without additional user input.
- Pre-alignment will position the clouds in a group and transform them close to their exact location
- Fine registration must be performed on clouds grouped with the rotary stage as the stage in not designed to position the clouds precisely
During alignment, Imager must be at least 30 degrees above the rotary table in order to identify the targets.
- The minimum standoff distance for the imager is 320mm for the 500 Cobalt and 505mm for the 250 Cobalt
Capturing Modes and Capturing Data
Stereo - Captures points that are identified by both left and right cameras
Enhanced Stereo - Captures points that are identified by both cameras plus identified by either the right or left camera alone. This allows data that is hidden from one of th cameras to be captured and therefore the coverage is larger.
- Quick - Captures points using fewer fringes, allowing the user to quickly verify exposure settings.
- Clicking "Options" in the Measurement window, you can:
- Change Area of Interest, Exposure Profiles
- Turn on Rage Finding and Enable Targets.
For reverse engineering, it is beneficial to remove the photogrammetry target data.
Tangential points are points significantly off normal to the projector and can be less accurate.
- Clicking, 'Remove tangential points', you have less data but better sphere fits.