![]() The bottom is 10-20C colder from my thermocouple investigations but does catch up if I let it sit for too long. After tin/lead components have been reflow-soldered, use selective soldering with a laser to place and solder all lead-free BGAs. ![]() Do not place lead-free BGAs with other tin/lead components. The FTDI chip on top didn't fall off the board when I reflowed a second time with it hanging upside down. Use the standard tin/lead reflow profile with peak reflow of 210 to 220C for all components except lead-free BGAs. I did two steps, top side with less components first, then bottom side with more components. I'll produce some videos so you can see what I see. I have to hand solder the holder next time. Many yellow-orange residue and some seem more than just surface. ![]() I just did the same run again and similar result. I tried to find temperature with my thermocouple taped to a board but the center seems to be up to 25DegC hotter than indicator on the oven and there is considerable hysteresis. Maybe my coin battery holder will not melt. Maybe I need longer pre-heat time and higher temperature? If it is not a result of sitting for too long in the oven after soldering phase, I will increase the "keep" temperature and let the oven cool boards sooner. The oven seems to be ramping at max rate all the time and then just sit at the set temp once it reaches it. The oven has only 3 temperatures and timers, and then a fourth temperature below which it turns on air cooling. Nitrogen atmosphere reduces the chances of oxidation during the process and ensures superior soldered joints.The boards are 10cm*8cm each. Integrated interior lighting reveals the status of the soldering process and allows for on-the-fly job modification where needed to optimize the reflow process.Įxternal connection with flow meter for inert gas is available for the LPKF ProtoFlow S. ![]() Observe the process through the ProtoFlow S's window. An operator is not required to constantly attend the process. The drawer can be programmed to open automatically, starting the cool-down phase. The LPKF ProtoFlow S is equipped with a motorized drawer which allows easy access to the circuit board. This data can be stored on a PC and analyzed later. The LPKF ProtoFlow S can be fitted with four optional thermocouple probes, which can be mounted anywhere on the PCB or components, allowing for complete data logging of temperature changes and instant feedback to the user. All profile parameters such as temperature, process duration, and cooling airflow can be individually programmed and stored as custom profiles, both in the ProtoFlow memory and via USB cable onto a host PC, allowing for virtually unlimited flexibility and profile storage. The LCD display allows for extremely easy data setting. Inert gas option prevents oxidation during process Motorized drawer for easy access and automatic cool-down after reflow process Integrated USB communication port for easy programming of reflow profiles and process recording and analysis Preprogrammed with industry standard profiles User-friendly LCD display ensures easy operation The LPKF ProtoFlow S can be fitted with a flow meter for inert gas to prevent oxidation during the reflow process, assuring optimal results of soldered joints. The LPKF ProtoFlow S is excellent for SMD Reflow soldering, adhesive hardening by precipitation, hardening by precipitation of conductive paste for plated-through holes, and other thermal procedures. Compact and versatile, the ProtoFlow S offers a large working area with motorized drawer for automatic cool-down and easy access, and microprocessor controlled temperature/time profiles. It is a key component in rapid SMD prototyping and small batch production. The LPKF ProtoFlow S is a convection oven for lead-free reflow soldering. The compact design and efficient power consumption make it one of the most useful components in any rapid PCB prototyping environment. ![]() The ProtoFlow S features even heat distribution, easy programming, and many pre-defined temperature profiles. The ProtoFlow S is LPKF's premiere convection oven, ideal for lead-free reflow soldering, meeting the stringent demands of rapid PCB soldering applications. ProtoFlow S - Lead-Free Reflow Oven Description: ![]()
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