Basler raL2048-48gm User Manual download pdf (Page 153)

AW00118302000 Acquisition Control

Basler racer GigE 143

int64_t encodercounterSize = Camera.ShaftEncoderModuleCounter.GetValue();

// Reset the shaft encoder module counter and the shaft encoder module re-

verse counter

Camera.ShaftEncoderModuleCounterReset.Execute( );

Camera.ShaftEncoderModuleReverseCounterReset.Execute( );

For detailed information about using the pylon API, refer to the Basler pylon Programmer’s Guide

and API Reference.

You can also use the Basler pylon Viewer application to easily set the parameters.

For more information about the pylon Viewer, see Section 3.1 on page 23.

For more information about the line start trigger, see Section 8.2.4 on page 87.

The Reverse Counter

The main purpose of the reverse counter is to compensate for mechanical "jitter" in the conveyor

used to move objects past the camera. This jitter usually manifests itself as a momentary change

in the direction of the conveyor.

The rules that govern the operation of the reverse counter are as follows:

 If the conveyor is running in the reverse direction and the current reverse counter count is less

than the maximum (i.e., less than the current setting of the Reverse Counter Max parameter),

the reverse counter will increment once for each shaft encoder reverse tick received.

 If the conveyor is running in the forward direction and the current reverse counter count is

greater than zero, the reverse counter will decrement once for each shaft encoder forward tick

received.

 When the Shaft Encoder Mode is set to Forward Only:

If the reverse counter is not incrementing or decrementing, the software module will output

a trigger signal for each forward tick received from the shaft encoder.

If the reverse counter is incrementing or decrementing, trigger signal output will be

suppressed.

 When the Shaft Encoder Mode is set to Any Direction:

If the reverse counter is not incrementing or decrementing, the software module will output

a trigger signal for each forward tick or reverse tick received from the shaft encoder.

If the reverse counter is incrementing or decrementing, trigger signal output will be

suppressed.

To understand how these rules affect the operation of the encoder software module, consider the

following cases:

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Basler raL2048-48gm User Manual Page 153