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Reflow Oven Controller

Reflow Controll

Teensy 3.1 based reflow oven Controller with TFT 2.8″ touch – on screen control.

Based on Teensy 3.1 takes care of the usual tasks of a reflow controller, namely running the PID loop needed to accurately control the oven’s temperature and control the heating profile.

This Reflow Oven Controller controls your reflow oven using the attached K type temperature sensor which is located in the oven – on top of baking PCB(s).

Adjustable is Conformance to specific time and temperature profiles, necessary in order to obtain the best results for reflow, when soldering SMD components with solder paste.

  • To configure the controller parameters, you need to set apropriate Profile on TFT screen. You can monitor actual temperature by serial interface port on your PC.
  • Boards and components are heated gradually during the preheating phase. This avoids generating mechanical stresses in the board and the components.
  • After preheating, the temperature is briefly raised to just below the soldering temperature. This allows the volatile ingredients of the solder paste to escape without forming bubbles.
  • Than, the temperature is raised to the soldering temperature. The solder paste liquefies and bonds the components to the board. The soldering temperature is maintained precisely during the soldering time to prevent damage from overheating.

The controller emits an acoustic signal to mark the end of the soldering phase, you need to open the front door for cooling to start take effect.
After cooling is done, the fully soldered boards can be removed from the oven.

Typical RoHS Reflow Profile:

RoHS Reflow Profile

Adjustable TFT screen:

Touch screen controll settings!

Needed Parts for installation into the Oven:

Power supply 230V 5V DC 3A – for Controller
800-1000W_Halogen_Ring_Infrared_Heaters (2pcs one on top, one on bottom of oven)
2 pcs Solid State Relays – 8A min (110 or 230V depending on your Voltage)
Solid State Relay 24-380VAC- 10A (3-32V DC Input)

Old Blog about Dispensing;

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It arrived! Works well. Thanks.
Thanks again for chasing up and trying to get some tracking info.
Hope your holiday in Indo was all you wanted.
Take care,
Scott
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ALTON dic222k@mail.ru http://ricunok.ru/ You have to take into account that this Dispenser is not as fast as air dispenser but it is fast enough to keep you doing right thing! I have placed a few videos on my YouTube test with different needles and paste have a look!!
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Scott Symes scott@huxconnect.com http://huxconnect.com This thing is great. Compact enough to pack away in my small workspace. It also improved neatness of solder paste on the PCB, resulting in super neat reflows, even for tiny WSON packages. Also provided great service trying to chase down a very delayed package (Australia Post suck! ) Thanks Mike!
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Feedback V4;

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Hi!

Just writing to let you know that someone reviewed Syringe Paste Liquid Dispenser 5V Dc Usb -New V4.

Excellent Product, Excellent Support
Very helpful for SMD assembly. Vendor very responsive and answers questions quickly. Much better than manual plunge-syringe systems.

You can see the review on the product page.

If you have any questions or concerns, please don’t hesitate to contact us.

Tindie Guarantee

My TINDIE Shop Buyer response:

Uncategorized

3 reviews

Product:

Documentation:

Shipping:

Communication:

Avatar

Reviewed By
Karan

Great product, fast shipping and great seller

Jan. 15, 2016
Really like the product. Great shipping and packaging too. It would be great if the seller could also give some combo options to buy solder paster and syringes too.

 

Response from the Seller

Feb. 19, 2016
Dear Karan,
In the meantime I have added some syringe connectors + parts to make life to you guys using Dispenser more comfortable!
I am Sorry but due to International shipping regulations Solder Paste could be a subject chemical substance import – and your import to USA (or any other country) could face customs clearance delays and could mean a lot of paperwork in order for you to import Dispenser…. Second issue is that there are so many different types of Solder paste and each guy likes his paste and it would be difficult for me to satisfy each guy needs… :-)I am glad my Dispenser works well for you and so many others using it!

Thank you for feedback and good luck! KEEP ON SOLDERING !!
Mike

Avatar

Reviewed By
Jarek

Great idea, excellent execution!

Jan. 7, 2016
Seller was very thorough in how to setup and use the dispenser, and it comes with a bunch of needle tips to use with the dispenser. I’m still waiting on my syringe adapter to come in (make sure you pick one up from somewhere!) and can’t wait to lay paste on my first board.

 

Response from the Seller

Feb. 19, 2016

Hello Jarek,

I am still patiently waiting for your feedback! I hope all is well and you are soldering full speed!!
Regards,
Mike

Avatar

Reviewed By
Paul

Works well, very pleased and highly recommended

Dec. 10, 2015
I received the dispenser after some delays in Canadian customs (the seller offered AMAZING support). The unit is solid and well built and fits well in the hand. I bought the dispenser for my first SMD project so I had high expectations and I was not disappointed. It took a few tries getting used to the operation of the buttons, getting the paste warm enough and choosing the correct dispensing needle. In 15 mins I was dispensing paste on 0402 and bigger pads without any problems (except for my eyesight!). This unit is now one of my go-to tools for building my small-run prototype SMD boards. I received the “older” version of the dispenser and the newest model looks to be even better. I highly recommend this dispenser.

Response from the Seller

Dec. 10, 2015
Thank you for your kind review!
I am glad that people appreciate my work and I am looking forward to new improvements!!Kind regards,
Mike

Solder paste printing process BASIC:

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Basic Operation of dispenser V-0.
In December Version V-1 was released! see http://wordpress.mencinger.biz/ for details!!

Solder paste is typically used in a screen-printing process, in which paste is deposited over a stainless steel or polyester mask to create the desired pattern on a printed circuit board. The paste may be dispensed pneumatically, by pin transfer (where a grid of pins is dipped in solder paste and then applied to the board), or by jet printing (where the paste is sprayed on the pads through nozzles, like an inkjet printer).

As well as forming the solder joint itself, the paste carrier/flux must have sufficient tackiness to hold the components while the assembly passes through the various manufacturing processes, perhaps moved around the factory.

Printing is followed by pre-heating and reflow (melting).

The paste manufacturer will suggest a suitable reflow temperature profile to suit their individual paste; however, one can expend too much energy on this. The main requirement is a gentle rise in temperature to prevent explosive expansion (“solder balling”), yet activate the flux. Thereafter, the solder melts. The time in this area is known as Time Above Liquidus. A reasonably rapid cool-down period is required after this time.

A good tin/lead solder joint will be shiny and relatively concave. This will be less so with lead-free solders.

As with all fluxes used in electronics, residues left behind may be harmful to the circuit, and standards (e.g., J-std, JIS, IPC) exist to measure the safety of the residues left behind.

In most countries, “no-clean” solder pastes are the most common; in the United States, water-soluble pastes (which have compulsory cleaning requirements) are common.

Storage
Solder paste should be stored in an airtight container at low, but above freezing, temperatures. It should be warmed to room temperature for use. Exposure of the solder particles, in their raw powder form, to air causes them to oxidize, so exposure should be minimized.

 

About Dispensing V2 & V3 Video Pages :

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Description of V2- V3 Solder Paste Dispenser

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DISPENSER for Manual solder Paste
application to PCB for reflow soldering or Hot-Air Soldering technics

Electronic 5V DC powered Solder paste V2 Dispenser AIR FREE /AIR LESS operation.  V2 and V3

The goal to build this Dispenser was to be as cheep as possible  and to avoid using any 3D printed parts! But still reliable and safe for use by hobby guys and school kids for low volume of PCBs.

This solder paste dispenser is generally to be used with any solder paste in a syringe (or flux, liquid, glue,..) –  syringe volume 10 to 15 cc.
Two buttons for PRESS and RELEASE turn the stepper motor shaft left or right and move piston in syringe in chosen direction and force the liquid or paste in syringe to move out through needle.
Dispenser has built in very powerful stepper motor with full metal gear gearbox witch with tremendous pressure forces paste or liquid out of the syringe. Basic use is for SMD SMT solder paste application to PCB for reflow soldering.
Appx. 25x PRESS-ings make 1 (one) rotation of the piston which moves the piston for apx. 0.5-1mm (0,019685 -0,3494 dec. inch) in the syringe.
I tested this V1 and V2 of Dispenser with several different Solder Paste Manufacturers and different needle sizes:
1) Blue/metric 0,41mm – US/Gauge 22- https://www.youtube.com/watch?v=uP4FD3tp3ck
2) Purple Gage 21 – 0.51mm
https://www.youtube.com/watch?v=LzHhUJj54ug
3) Gauge 23-24     (inside Dia 0.38 -0.41 mm)
https://www.youtube.com/watch?v=o4PbVOhY2UQ
and as well stepper motor force produced – apx. 14 kg / 30 pounds
https://www.youtube.com/watch?v=pAvSR6YC-Bs

Power Supply needed is 5V DC (0.5 to 1A).  I simply use USB cable and phone charger or computer USB port, spare phone USB battery pack…or similar.

Due to fact that many Solder Paste Co. request in manuals storage of the Solder Paste in cool areas with 0-10deg C storage temperature please note that Syringes stored in fridge shall be heated up with hot air/ shrink tube hot air gun / hair drier or in hot water to 40-60 deg C for better viscosity of solder paste for use with this dispenser.

You have to take into account that this Dispenser is not as fast as air dispenser but it is fast enough to keep you doing right thing!  I have placed a few videos on my You Tube – test with different needles and paste,… have a look!!
Here is a procedure we worked-out with one of my German Client: I quote the email text:
“I didn’t pre-heat the solder paste, just took it out of the fridge and let it rest for some hours at room temperature. I built up pressure until some paste came out of the needle and then released the pressure. First I tried pressing and instantly releasing again, but it was quite hard to get the right amount of paste on the pads…. It was a success with pressing and not releasing after. While the paste was slowly flowing I just did pad after pad and always got the right amount. I tried different needles and it worked even with really narrow ones. Did some DFNs, TQFPs, SSOPs, and many 0603s. Worked really neat, just had to remind me to build new pressure once in a while 🙂
I like the dispenser and I’m happy to finally leave my toothpick method behind me 🙂  “”
Best regards,
Nicolas

I would highly recommend BEGINERS NOT TO start with metal needles but with but with PLASTIC CONICAL outlets!!

Reference:
please refer to:
– http://wordpress.mencinger.biz/
– See photos here attached and in the blog at
http://www.eevblog.com/forum/reviews/solder-pasteflux-manual-syringe-applicator/
-My You Tube video link: https://www.youtube.com/watch?v=QcRrEAo1YXs

M.Mencinger, December 2015

Package Included:

1x PCB with Stepper Motor and build inn parts as on photo. (blue PCB & transparent cover),
1x Syrinage 10ml with LOCK needle output neck,
9 pcs plastic needles as on photo,
4 pcs cable ties,

NOT in supply 5V DC Charger and USB cable.

Do not hesitate to ask questions!!

GERMAN TEXT:
Lotpaste Spender/(Dispenser) – Controller – Extruder
Platine fertig montiert und geprüft.
Preis gilt für einen Lotpaste Spender, montiert und getestet. – siehe Foto.
Zentrale Funktionen:
Der Lotpaste Spender ist für Spritzen mit Lotpaste (Spritzen Volumen von 10
bis 15cc) .
Im Kühlschrank gelagert Spritzen sollten vor der Verwendung in heißem
Wasser auf 40 bis 60 °C aufgeheizt werden.
Funktionsweise:
Zwei Tasten, kurzer druck (Motor links + rechts)
Ca. 25 mal Drücken ergibt eine (1) Umdrehung des Kolbens, was einer Strecke von
etwa 0,5 mm entspricht.
Sehr leistungsstarker Shrit Motor mit starkem Druck für Reflow-Löten mit SMD/ SMT
Lotpaste auf Leiterplatten geeignet.
Stromversorgung und USB-Kabel erforderlich (beides nicht im Angebot
enthalten): 5V DC – 1A -siehe Bilder.

You Tube video link: https://www.youtube.com/watch?v=QcRrEAo1YXs
http://www.eevblog.com/forum/reviews/diy-solder-paste-dispenser/15/
more here : http://www.eevblog.com/forum/reviews/solder-pasteflux-manual-syringe-applicator/90/ with some videos…

Lieferinhalt:

1x PCB mit Motor Kolben und bauen inn Teile. (blaue PCB & transparente Abdeckung).
1x Syrinage 10ml with LOCK needle output neck,
9 pcs plastic needles as on photo,
4 pcs cable ties,

NICHT in Versorgung: 5V DC-Ladegerät und USB-Kabel.

Zögern Sie nicht Fragen zu stellen !!

NewV2PasteDispenser

MD Lötpaste Spender V3- Controller / Extruder-Platine mit montierten und geprüften Teilen.

Der Preis ist für 1einen Spender mit bestückter & getesteter Platine. ( siehe Foto.)

Zentrale Funktionen:

Der Lötpaste Spender ist verwendbar auch für Flussmittel, etc. (Spritzenvolumen 5-10, 15 ml max.), über den Joystick wird der Schrittmotor gesteuert der den Kolben nach vor oder zurück bewegt.

Die Stepper Geschwindigkeit und somit auch die Kolben Geschwindigkeit wird, entweder über den Joystick oder den eigenen „Speed Button“ gesteuert.
Es gibt 5 Geschwindigkeiten die über die 5 onboard LED’s angezeigt werden, in der Höchsten Geschwindigkeit wird der Kolben um ca. 0,5-1mm in die Spritze reinbewegt.

Der sehr leistungsfähige Schrittmotor mit Vollmetallgetriebe erzeugt einen hohen Druck ist ideal für SMD SMT Lotpaste Anwendung für Reflow-Löten.
Ein externes 5V 1A Netzteil mit Mini USB Stecker ist erforderlich (ist in den Preis nicht inkludiert) , siehe Foto.

Detailfotos und weitere Informationen sind unter folgenden Links zu erreichen:
http://www.eevblog.com/forum/reviews/solder-pasteflux-manual-syringe-applicator/240/
http://wordpress.mencinger.biz/

Spritzen die im Kühlschrank aufbewahrt werden, müssen vorher mit Heißluft / Fön oder in heißem Wasser bei 40-60°C erwärmt werden um eine bessere Viskosität der Lötpaste zu erreichen.

You-Tube Video-Link: https://www.youtube.com/watch?v=ucoj6OZu5kI

Lieferinhalt: