Hi,
not sure if this forum section or the JEOL one is the better place.
I have been noticing that my JEOL autofocus (JEOL 8900; unknown autofocus type - I guess maximum intensity) and the PFE autofocus (maximum intensity) results do not match and that the PFE autofocus has a constant slight offset, enough to screw with the Si and Al intensities.
Playing around with the settings has not produced the results I am looking for. Therefore, I wondered if anyone could weigh in with their preferred PFE autofocus settings.
Things I have tried so far:
Meddled with the actual brightness settings on the JEOL (OM-AFD) - no effect
Added an automatic offset to the probewin.ini file - no effect, maybe I did it wrong??
Change autofocustype to gaussian - better but results in an error message of 'not enough data points' relatively often.
I would love to play around with it in much more detail and run the debugger but I would rather avoid this now (paying customers). The fact that the JEOL focus does a better job, lets me think that some values in the probewin.ini should be tweaked.
Current settings:
AutoFocusPresent=1
AutoFocusType=1
AutoFocusOffset=0.0
AutoFocusMaxDeviation=30
AutoFocusThresholdFraction=0.33
AutoFocusMinimumPtoB=1.4
AutoFocusRangeFineScan=100
AutoFocusRangeCoarseScan=600
AutoFocusPointsFineScan=200
AutoFocusPointsCoarseScan=100
AutoFocusTimeFineScan=20 ; 1-500 msec
AutoFocusTimeCoarseScan=20
Any input is welcome. Thank you!
Anette