One thing nobody's mentioned yet ??the motion profile is where servo fine blanking really separates from hydraulic fine blanking.
On a hydraulic fine blanking press, you get a constant velocity through the cut. On servo, you can program a velocity reduction right at material entry (the last 0.5-1mm before contact), then ramp back up through the shear zone. We run about 15mm/s approach, drop to 3-5mm/s for the initial 0.3mm of penetration, then 8-10mm/s through the rest of the cut.
Why this matters: the initial contact is where rollover forms. Slower entry = less rollover = better edge quality without going to insanely tight clearances. We've gotten parts that pass the "100% burnish" spec with 0.6% clearance instead of the usual 0.3-0.5% just by tuning that entry velocity.
Counter punch force is the other big one. On hydraulic you set it and forget it. On servo you can program the counter punch to ramp up progressively as the punch advances. Start at maybe 30% of blanking force, ramp to 60% by mid-cut. This keeps the slug flat without the energy waste of running full counter force the entire stroke.
Tonnage budget for fine blanking on servo: plan for 2.5-3x your calculated blanking force. That covers blanking + V-ring + counter punch. If you're right at the edge of your press capacity, you'll have problems ??fine blanking is not the place to run a press at 90% rated tonnage.