An automatic coffee roaster uses a programmable control system — typically a PLC — to execute and repeat roast profiles without constant manual intervention. Once you program a roast profile, the machine follows it automatically on every batch, ensuring batch 200 is identical to batch 1.
What Makes a Coffee Roaster “Automatic”?
- Profile recording and replay — save a roast curve and repeat it exactly
- Automatic gas valve modulation — PLC adjusts flame to follow the target temperature curve
- Automatic airflow control — VFD adjusts drum fan speed automatically
- Automatic drop trigger — machine drops the bean at the exact programmed temperature
- Data logging — every batch recorded with time, temperature, and event data
Yoshan Automatic Coffee Roasters: YS Series with Siemens PLC
Yoshan’s YS Series is built around a Siemens S7 PLC — the industry standard used in food processing, pharmaceuticals, and beverage manufacturing worldwide.
YS Series automatic features:
- Siemens S7 PLC with 7-inch touchscreen HMI
- Up to 50 saved roast profiles
- ±1°C temperature control accuracy
- Real-time Artisan roasting software compatibility
- Automatic green bean loader (optional, for 10kg+)
- Remote alarm system (SMS/email on fault)
Available from 6kg to 300kg per batch.
Automatic vs Manual Roasters
| Type | Operator Skill Required | Best For |
|---|---|---|
| Manual (SD Series) | High — trained roastmaster | Artisan, small batch |
| Automatic (YS Series) | Low — operator loads/unloads beans | Scale, consistency, multi-shift |
Frequently Asked Questions
Can an automatic roaster replace a skilled roastmaster?
An automatic roaster executes a programmed profile perfectly — but the profile must be created by a skilled roastmaster. Think of it as locking in expertise: the roastmaster creates the recipe once, and the machine repeats it indefinitely.
Can I connect a Yoshan automatic roaster to Artisan software?
Yes. The YS Series exports real-time data via USB or Ethernet, compatible with Artisan roasting software.
Want to bring consistency and scale to your roasting operation? Request a Yoshan automatic coffee roaster quote →
