Do stepper systems lose position?
Under normal circumstances they don’t. However, if they are overloaded they can stall. Fortunately, this is usually very obvious: as a stepper motor stalls, it does not just miss a step, but it misses a whole series of steps and the actual end position is far of the commanded position. It is therefore always smart to do some check at the end of a measurement whether the positioner is still in the commanded position. One can use the drift check for that, which compares the AUT response on a certain AUT/probe postion before the measurement starts with the response on that same AUT/probe postion after the measurement has completed.
Related Questions
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