Allow adjusting Unexpected Movement threshold independently from Position Error Window
The axis process monitors the position of the axis while the drive is disabled, and will fault if the motor moves too far while deactivated. Currently this error threshold is the same as the Pos Error window used for monitoring following error while the axis is activated.
This is acceptable for axes with brakes, as the axis should generally not be able to move while deactivated. However for low-friction axes without brakes you are left with the choice of either living with large numbers of nuisance Unexpected Movement Detected errors, or effectively disabling position error monitoring while the axis is activated (which is an important safety feature.)
It would be better if these values could be set independently.
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