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Servo presses cost 40-80% more than equivalent mechanical presses. Justifying this investment requires a structured ROI analysis that captures all cost and benefit factors.
## Cost Factors
**Initial investment premium:**
- Servo press price vs mechanical press price
- Installation and commissioning (typically 5-10% of press price)
- Training (2-5 days per operator/maintenance technician)
**Ongoing costs:**
- Energy consumption (servo press: 30-50% lower than mechanical)
- Maintenance (servo press: higher drive/encoder costs, lower mechanical wear)
- Tooling (servo press: 20-40% longer die life due to controlled forming speed)
## Benefit Factors
**Energy savings:**
```
Annual savings = (P_mechanical - P_servo) ? hours/year ? energy_cost
```
Example: 200-ton mechanical press at 45kW vs servo at 28kW, 4000 hours/year, $0.12/kWh:
Annual savings = (45-28) ? 4000 ? 0.12 = $8,160/year
**Tooling savings:**
```
Annual savings = (die_cost / mechanical_life - die_cost / servo_life) ? annual_strokes
```
Example: $15,000 die, mechanical life 500k strokes, servo life 700k strokes, 2M strokes/year:
Annual savings = (15000/500000 - 15000/700000) ? 2,000,000 = $17,143/year
**Quality savings:**
- Reduced scrap rate (servo: 0.1-0.5% vs mechanical: 0.5-2%)
- Reduced rework labor
- Fewer customer returns
**Flexibility premium:**
- Ability to run multiple part families on one press
- Faster changeover (programmable motion profiles)
- New business opportunities requiring servo press capability
## Simple Payback Calculation
```
Payback (years) = Investment premium / Annual savings
```
Typical result: 3-6 years payback for high-volume automotive applications.