Set a line trigger

Internal line trigger

The internal line trigger provides a continuous signal in the frequency of the exposure time.

In the Configuration window navigate to Acquisition Control → Line Trigger. Below Internal select the Generate line trigger at frequency of line rate checkbox.

Alternatively, you can set the internal line trigger in the camera feature tree by executing the following step:

External line trigger

The external line trigger can be provided by an encoder signal or a signal generator. Refer to Trigger Selector.

1. In the Configuration window navigate to Acquisition Control → Line Trigger.
2. Below External select the Generate line trigger from external encoder signal checkbox.

In Encoder Source A and B select the desired input Line. Refer to electrical installation.  In Line Format select the electrical input signal. Refer to electrical installation. In Encoder Divider float input the number of encoder impulses to generate one LineStart signal. Refer to Encoder divider float. In Encoder Average input the number of averaged input signals.

Alternatively, you can set the external line trigger in the camera feature tree by executing the following steps:

Trigger Selector 

Encoder0

The Trigger Source → Encoder0 triggers the LineStart of the image acquisition. A certain number of encoder (Encoder divider float) impulses creates one LineStart signal. 

Line

The Trigger Source → Line triggers the LineStart of the image acquisition. Each impulse generates one LineStart signal. 

Encoder divider float 

An encoder typically does not have an integer ratio to the camera resolution. Arbitrary ratios of encoder pulses per sensor line are possible, for example, 2.25. The value range is 0.05 – 255 pulses per line.

Example

• Linear Stage with a tread pitch of 1 mm
• Encoder with a resolution of 1000 Impulses per turnaround (I/U) → 1 Impuls per µm 
• Optical lateral Camera resolution of 10 µm 

Encoder divider float =  Optical resolution × encoder transport resolution = 10 µm × 1 I/µm = 10 I