Power Brick Controller User Manual
Connections and Software Setup
42
Bias Correction
The Power Brick Controller has the capability of correcting for biases of the cosine / sine signals. These
corrections are suitable when interpolating in the Gate3 without the ACI (Auto Correcting Interpolator)
option. This procedure is described in the
Sinusoidal Encoder Bias Corrections
section of this manual.
Sinusoidal Encoder Count Error
With Sinusoidal encoders, the Power Brick Controller has the capability of trapping encoder count (loss)
errors. This is described in detail in the
Encoder Count Error
section of this manual.
Sinusoidal Encoder Loss Detection
Warning
Loss of the feedback sensor signal is potentially a very dangerous
condition in closed-loop control, because the servo loop no longer has
any idea what the true physical position of the motor is – usually it
thinks it is “stuck” – and it can react wildly, often causing a runaway
condition.
With Sinusoidal encoders, the Power Brick Controller has the capability of detecting the loss of an encoder
signal. This is described in detail in the
Encoder Loss Detection
section of this manual.
Note
Note the distinction between the encoder count error, which reports
loss of counts due to bad transitions of the quadrature signals, and
encoder loss, which indicates that one or more quadrature / sinusoidal
signals are missing.
