Cognex Trevista CI Dome

The Cognex Trevista Dome is parameterized using the setup wizard. This takes over the correct configuration of all camera functions in the background.

Information: The correct setup and cabling can be found in the Cognex Trevista instructions.

Setting up the camera

The camera settings are set automatically by the setup wizard and do not need to be entered in the program management. The setup wizard is started via the "Live image" button of the respective camera stationt.

Important: The wizard works universally for Trevista area scan and line scan cameras. The menu items are adapted specifically to the device.

Best Practise for the initial setup

Guidance for best practice

It is recommended to set up the lens and the camera distance first

First start in "Setup mode for initial setup" mode
Start continuous image acquisition
Set a rough exposure time . 0.050 to 0.5ms is usually a good starting point
Set contrast to 0 for optimum image quality
Setting the working distance of the lighting
Focus the lens
Set trigger mode

Important: Make sure that the image in the area to be checked is not overexposed!

Once the camera has been mechanically set up, the detailed configuration is carried out

Only for area scan cameras:
- Rotate image 180° according to the desired display
- Parameterize additional image recordings
Define the area to be checked (ROI)

Main menu

The main menu contains control functions for setting up and testing the camera. The menu items are activated dynamically depending on the camera's operating mode.

	Menu	Description
	Continuous	Starts continuous image acquisition by triggering one software trigger after the other. This creates the impression of a live image without overloading the system with too many images.
	Software Trigger	Triggers a single image acquisition.
	Setup Mode	This function is helpful for the initial setup of the system. It deactivates the ShapeFromShading image and provides a standardized greyscale image for setup.

"Basic settings" menu

The basic settings are defined here.

Device
	Camera	Image capture device connected to the Trevista. Either GigE Vision camera or CameraLink frame grabber.
	ShapeFromShading	Image capture mode: Setup mode or ShapeFromShading.
	Status display	Image counter for diagnosing the acquired images.

	Trigger settings
		Mode	The trigger mode is used to set the start signal for image capture: Manual: For triggering via fieldbus or Ethernet External: For digital triggering via IN7 via Trevista controller Freerun: Endless self-triggering of the controller

Image acquisition
	Image setup	This option is only active for area scan cameras with active multi-image acquisition.
	Exposure time	Exposure time of the image acquisition in milliseconds.
	Contrast	Contrast level of the image: 0: lowest contrast / highest image quality 1: highest contrast / lowest image quality

Region of interest
	Rotate image	This option can be used to rotate the image of area scan cameras by 180°.
	Offset X	Offset of the image area along the X-axis.
	Offset Y	Only for area scan cameras: Offset of the image area along the Y-axis.
	Width	Width of the image.
	Height	Height of the picture.
	Maximize	For area scan cameras: Maximizes width and height to the supported maximum of the camera. For line scan cameras: Maximizes the width of the image to the supported maximum of the camera.
Information: The image area (dashed rectangle) can be set graphically in setup mode.

♣Line scan camera settings
	Line encoder	This option is only available for line scan cameras: Software Encoder or Hardware Encoder
	Line frequency	For software encoder: Line frequency in Hz.
	Lines/revolution	For hardware encoders: Number of lines per encoder revolution.
	Speed	For hardware encoders: Maximum line rate of the last recording to maximum possible line rate.

Inspection tools

If setup mode is deactivated, the captured images can be loaded directly into the inspection tools from the sequence.

Important: In multi-image mode, only the tools that are linked to the selected image capture are displayed.

Tools

CogTrevistaTool or EasyTool (with CogTrevistaTool included) from the test sequence. All changes to the tool are written directly to the test sequence.

Diagnosis
Important: The diagnostic functions are only available in setup mode!
	Timeout	Timeout for image capture in setup mode.
	Trevista Diagnose	Diagnostics directly from the Trevista Grabber. These are used for the initial setup and testing of the device. The available diagnostics vary depending on the device type.

"Advanced settings" menu

The advanced settings should only be changed by advanced users with the appropriate specific expertise.

GigE settings
	Latency	The latency level controls the CPU load during GigE transmission. 3 reduces the CPU load, but increases the transfer time. 0 increases the CPU load, but shortens the transfer time.
	Interpacket Delay	Delay between sent packets (microseconds) to reduce the CPU load on the host PC.
	Request Timeout	Specifies in milliseconds how long the GigE application should wait between receiving the header and trailer packets.

	Mechanical design
		Alignment	Mounting angle of the camera in relation to the CI Dome: 0° 90° 180°: (Standard for area scan camera devices) 270° (Standard for line scan camera devices)