Simple and Mighty
Our SimpleFlow-II Reflow Oven Controller with Dual Thermocouples.
PID Temperature Control
The PID algorithm has been greatly reworked in velocity form. A great steady temperature control is very much achievable.
Check out the temperature curve in our reflow oven mod. This is from 19~100 degC.
USB Serial Data Output
Outputs serial data via FTDI FT231X USB UART for thermal profile analysis and for refining the thermal profile.
We like FTDI for its great SW support and HW stability.
Mini-Jack Connectors
The right PCC-SMP mini jacks, just Plug and Play. No need to mess with the thermocouple wires.
This also ensures proper signal delivery.
Two Is Better Than One
The SimpleFlow-II has Two Thermocouples (MAX31856) onboard.
Monitor the actual PCB/component temperature profile against the oven temperature profile.
Remember, it's the actual PCB/component temperature that really matters, not the oven; and chances are they are not equal.
Compensate Reflow Profile In-Flight
With only seconds left, you sense the Reflow Profile needing more time in the phase to yield success. What would you do?
Compensate the profile while halfway into the Soak/Reflow Phase.
Bake / Curing / Drying
Yes, you've seen those MSL warning labels. You may have ignored them for various reasons (as we once did).
Many IC's, LED's, connectors are moisture sensitive and need to be baked before SMT process. Bake before use will reduce unexpected field failures.
Heat treatment is also an important phase for other works such as powder coating, porcelain clay paint, pre-process for electro-plating and many more; not just SMT.
PS...Yes, do bake before using that PCB or that QFN chip stored in the drawers 3-months ago.
Enhanced Servo PWM Output
We gave the Servo Output a separate power path to ensure system stability; and added reverse EMF protection.
The stability boost is good.
Want More Thermocouple Inputs?
OK, so Two MAX31856 thermocouples are not enough. How about the option to add four more MAX31856?
ARDUINO PLATFORM
The SimpleFlow Reflow Oven Controller was created using some of the best parts and with the Arduino Platform. If you'd like to utilize this controller board for something else, you are very welcome to. We can supply the base display libraries for your tinkering.
| Features | Descriptions |
|---|---|
| Power Input | 5VDC (with reverse polarity protection) |
| Control Method | PID |
| Lead-Free Reflow | Yes |
| Reflow Profile Type | Soak-Ramp Profile |
| Bake Function | Yes, adjustable target temperatures from 30-250 degC with a Pre-Heat Phase |
| Bake Duration | From 15mins to 10 days |
| Self Learning | Yes |
| In-Flight Adjust | Yes |
| Buzzer Alerts | Yes |
| Data Link | USB Serial Link via FTDI FT231X |
| Thermocouple IC | 2 x MAX31856 (with enhanced noise immunity and expandable to 6) Cold-Junction Error: +/- 0.7°C (-20-+85 degC) Gain Error: -0.13 / +0.12 (-200°C to +1372 degC) Built-In Linearity Correction |
| Thermocouple Connector | PCC-SMP compatible mini jacks |
| Outputs | 4 x MOSFET output (200mA; open drain); 1 x Servo PWM output (with reverse EMF protect and separate power path) |
| Output Terminal Block | Eurostyle (Rising Cage Clamp) |
| Output Status Display | Yes, LED on each output |
| Supported Output Types | Top/Bottom Elements Additional Heat Elements Internal Convection Fan External Cooling Fan |