counter − counts input pulses (DEPRECATED)
loadrt counter [num_chan=N]
counter is a deprecated HAL component and will be removed in a future release. Use the encoder component with encoder.X.counter−mode set to TRUE.
counter is a HAL component that provides software- based counting that is useful for spindle position sensing and maybe other things. Instead of using a real encoder that outputs quadrature, some lathes have a sensor that generates a simple pulse stream as the spindle turns and an index pulse once per revolution. This component simply counts up when a "count" pulse (phase−A) is received, and if reset is enabled, resets when the "index" (phase−Z) pulse is received.
This is of course only useful for a unidirectional spindle, as it is not possible to sense the direction of rotation.
counter conforms to the "canonical encoder" interface described in the HAL manual.
counter.capture−position (uses floating-point)
Updates the counts, position and velocity outputs based on internal counters.
Samples the phase−A and phase−Z inputs and updates internal counters.
counter.N.phase−A bit in
The primary input signal. The internal counter is incremented on each rising edge.
counter.N.phase−Z bit in
The index input signal. When the index−enable pin is TRUE and a rising edge on phase−Z is seen, index−enable is set to FALSE and the internal counter is reset to zero.
counter.N.reset bit io
counter.N.counts signed out
counter.N.position float out
counter.N.velocity float out
These pins function according to the canonical digital encoder interface.
counter.N.position−scale float rw
This parameter functions according to the canonical digital encoder interface.
counter.N.rawcounts signed ro
The internal counts value, updated from update−counters and reflected in the output pins at the next call to capture−position.
encoder(9). in the LinuxCNC documentation.