I made a quick test. I assumed that the Step Size comes from not 1/2 NCFZ, but straight from the full value of the NCFZ, so the Step Size is 26. If the linear algorithm moves the tube owtwards for 10 x Steps Size that is 260 steps, then the tube moves outwards less than 1mm. And that should be OK, as my calculation says that 1mm means 275.3390 steps.

But my question is still going: if the proper sampling begins after coming back, inwards, at the position of -5 steps, so is it able to find the focus within less than 1mm? (-5 steps, +5 steps)?

Martha.

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