STC Servo Series (C‑Frame Double Crank) Solves High‑Volume, High‑Precision Stamping Challenges

2. Qiaosen STC Servo Series – Key Specifications & Advantages

Core Technical Data (STC‑200sv)

• Nominal capacity: 200 tonf
• Frame: One‑piece heavy steel, stress‑relieved
• Fuselage deflection (110% load): ≤0.025 mm/m
• Slider parallelism: ≤0.015 mm / 300 mm
• Repeat positioning accuracy: ≤±0.003 mm
• Stroke: 10–250 mm (programmable)
• Speed: No‑load 20–120 SPM; full‑load 55–65 SPM
• Motor: Direct servo drive (no belt loss)
• Energy consumption: 0.72 kWh/h
• Noise (full load): ≤72 dB
• Precision standard: JIS Class 1 (ISO 9001 & CE certified)

Why STC Double Crank?

• Wider bed & double crank → better balance, minimal deflection
• Ideal for wide progressive dies and large single parts
• More stable than single‑crank STA under eccentric load

3. Customized Solution for the Customer

1. STC‑200sv main units (3 sets)
   • 15.6” HMI, multilingual, 9 standard motion curves
   • Electronic cam + soft limit + overload protection
2. Progressive die optimization
   • Pendulum curve + slow forming at critical stations
   • Reduced cracking on 2.0–3.0 mm 304 SS
3. Automation interface
   • Connect to existing servo feeders & safety light curtains
4. Mold memory & fast setup
   • 200 mold recipes stored; change time <20 min

4. Measured Results – Before vs After