Digital BW, The Print

I'm starting to learn about the curve creation process and am in the 
ink density calibration stage. I've tried several ink limits to 
determine it, but what I would like to have some insight on is whether 
the percentages of the black output on the calibration mode at my 
chosen ink limit percentage should have visible separation from 0% to 
100%; as it would be in a conventional 21 step stepwedge? I've narrowed 
it down to printing calibration mode at 45% and I do have separation of 
the black from 0% to 100%. Help at this stage will help me go on to the 
next step of calculating the othere ink densities compared to the black 
ink. I think I'll have access to a densitometer sometime this week and 
can go on if these steps now have been determined correctly.

Your friend in Photography,

Johnny