Reflow oven zone temperature set up and thermal profile
The process of hot air reflow soldering is essentially a heat transfer process. Before starting to “cook” the target board, the reflow oven zone temperature needs to be set up.
Reflow oven zone temperature is a set point where the heat element will be heated to reach this temperature set point. This is a closed loop control process using a modern PID control concept. The data of hot air temperature around this particular heat element will be fed back to controller, which decide to turn on or off the heat energy.
There are many factors that affect the board’s ability to warm up accurately. The major factors are:
The conclusion is:
Oven setup temperature is not exactly the same as PCB temperature. When you need to optimize the reflow profile, you need to analyze the board parameters such as board thickness, copper thickness, and components as well as be familiar with your reflow oven’s capability.
Initial PCB temperature
In most of situations, the initial PCB temperature is the same as room temperature. The greater the difference between PCB temperature and oven chamber temperature, the faster the PCB board will get heat.
Reflow oven chamber temperature
Reflow oven chamber temperature is the hot air temperature. It may be related to the oven setup temperature directly; however, it is not the same as the value of set up point.
Thermal resistance of heat transfer
Every material has thermal resistance. Metals have less thermal resistance than non-metal materials, so the number of PCB layers and cooper thickness will affect heat transfer.
PCB thermal capacitance
PCB thermal capacitance impacts the thermal stability of the target board. It is also the key parameter in obtaining quality soldering. The PCB thickness and the components’ thermal capacitance will affect heat transfer.
SMT Reflow Oven, Lead free Reflow Oven, Reflow Oven Manufacturer, LED reflow oven, PCB Reflow Oven, Nitrogen Reflow Oven, Dual Rail Reflow Oven, China Reflow Oven, wave soldering machine, Dual Rail Wave Soldering Machine, Nitrogen Wave Soldering Machine, Wave Soldering Machine Manufacturer.
|Flason Electronic Co.,ltd provide a full SMT assembly line solutions, including
SMT Reflow Oven,
Wave Soldering Machine,
Pick and Place Machine,
SMT Stencil Printer,
SMT AOI SPI Machine,
SMT Reflow Oven,
SMT Peripheral Equipment,
SMT Assembly line,
SMT Spare Parts
etc any kind SMT machines you may need, please contact us for more information:
wechat whatsapp:+8613691605420, Skype: flasonsmt, Email: firstname.lastname@example.org
1) This is the first time I use this kind of machine, is it easy to operate?
There is English manual or guide video that show you how to use machine.
If you still have any question, please contact us by e-mail / skype/ phone /trademanager online service.
2) If machine have any problem after I receive it, how can I do ?
Free parts send to you in machine warranty period.
If the part is less than 0.5KG, we pay the postage.
If it exceeds 0.5KG, you need to pay the postage.
3) MOQ ?
1 set machine, mixed order is also welcomed.
4) How can I buy this machine from you? ( Very easy and flexible !)
A. Consult us about this product on line or by e-mail.
B. Negotiate and confirm the final price , shipping , payment methods and other terms.
C. Send you the proforma invoice and confirm your order.
D. Make the payment according to the method put on proforma invoice.
E. We prepare for your order in terms of the proforma invoice after confirming your full payment.
And 100% quality check before shipping.
F.Send your order by air or by sea.
5)Why choose us ?
A. Gold supplier on Alibaba !
B. Trade assurance to US$54,000 !
C. Best price & Best shipping & Best service !