Peter:
No, that should work fine. As long as one slot is large enough in
comparison to the others it should work. Check the "#Slots" DRO, if it is
correct and stable, then all is well, if it is 0, then the larger slot is
not being seen. You will get no RPM reading or number of slots unless the
index slot is seen as unique.
Take note as well that there is no Timing Mark LED yet, only an index. I
will fix that soon...
Art
www.artofcnc.ca