Author Topic: DIY reflow oven - suitable UK/EU candidates (Read 59160 times)

bit.cyber · « **Reply #50 on:** May 31, 2017, 08:55:53 pm »

I was able to source the Boom Mat in Europe at a couple of different auto suppliers. Typically high performance / race car accessory suppliers.
Specifically I purchased suitable Boom Mat from TurboZentrum in Berlin, Germany.

There's a related thread which I started detailing my efforts: https://www.eevblog.com/forum/projects/adventures-in-home-reflow-toaster-oven-conversion/msg1177124/#msg1177124

Plus also check out my website with relevant postings: http://lagrangianpoint.net/tag/reflow/

Podrowski · « **Reply #51 on:** November 16, 2017, 11:30:05 am »

I know this is an older topic, but since it's referred to from the build guide on the Whizzo website it seems like the right place.

Another usable candidate for a reflow oven could be the Rommelsbacher BG950 'Speedy'. I'ts a 10 liter model, slightly bigger than the Steba KB 11. It has a top and bottom quarz heating element for a total 950 watts heating power. It also allows for the tray to be positioned exactly between the elements. It is a little low on power, but it's also quite cheap when buying from German Amazon, so you could buy two and use the heating elements of the second oven to double up on heating power.

ElektroQuark · « **Reply #52 on:** November 16, 2017, 11:51:55 am »

You can see my attempts for a reflow oven HERE.

It uses the Andy Brown reflow controller.
It's a 10 liter one, very small, vey cheap.
You will see how a resistance heating element fails at trying to maintain the correct profile.

okp · « **Reply #53 on:** December 16, 2017, 09:07:30 am »

Hey, I got my Controleo3; but can't find a small good oven. Any support is welcome !

https://www.eevblog.com/forum/beginners/reflow-oven-controleo3-in-eu/msg1376160/#msg1376160

ironcurtain · « **Reply #54 on:** December 19, 2017, 06:03:16 am »

I have been looking through Amazon for my country and Germany, considering these:

https://www.amazon.es/dp/B01LCOF9PI/_encoding=UTF8?coliid=I3LCQYFQHSMOHY&colid=EWIJYZXBUT9K&psc=1
https://www.amazon.de/Spice-Habanero-elektrischer-Umluftofen-5-6-verschiedene/dp/B01LCOF9PI
(convection, Spice - Habanero electric convection oven - 23 - 31 - 40 liters - 1380 - 1500 watts)

https://www.amazon.es/dp/B01MF5ORJ0/_encoding=UTF8?coliid=I1ME95WUL31JW0&colid=EWIJYZXBUT9K&psc=0
https://www.amazon.de/TZS-First-Austria-Innenbeleuchtung-Doppelglast%C3%BCr/dp/B01MF5ORJ0
(TZS First Austria - 19 Liter Minibackofen mit Krümelblech | 1380 Watt | Innenbeleuchtung | Umluft | Mini Pizza-Ofen | Doppelglastür | Timer | Backofen | Mini Backofen | Pizzaofen)
Probably my first choice, it seems well built and it's also a convection oven. Two heating elements plus fan and under 80 eur.

https://www.amazon.es/dp/B0079WCPFU/_encoding=UTF8?coliid=I1QCG270VWF3KO&colid=EWIJYZXBUT9K&psc=0
Probably my second choice, though the Spice is even cheaper. Looks solid, not sure if it has a fan. No information on heating elements.

https://www.amazon.es/dp/B01CI2JX5U/_encoding=UTF8?coliid=I3GRFSW1PW03F4&colid=EWIJYZXBUT9K&psc=1
(Moulinex Optimo, seems like you just pay for the brand here)

I have a few boards that will be a PITA to do by hand, so I'm more or less rushed to get this build started. Any comments? I hope this helps other people too.

TIOUK · « **Reply #55 on:** December 19, 2017, 12:28:40 pm »

For more heat input add these, worked for me.

https://www.ebay.co.uk/itm/CATERING-PUSH-FIT-COMPLETE-SET-HEAT-LAMP-AND-HOLDER-GANTRY-Lamp-Holder-220mm-R7S-/302084035412?hash=item46559c9354

yiancar · « **Reply #56 on:** February 27, 2018, 02:00:56 pm »

A bit of an old thread but.. here we go.

My attempted solution to our 230V problem is to combine 2 relatively big 120V ovens. Ill document as much as I can.

Firstly the ovens I chose where this B+D ones https://www.amazon.com/BLACK-DECKER-TO3250XSB-Convection-Countertop/dp/B00LU2I428/.

Firstly I disassembled one and got the elements out. It was pretty easy, just some metal tabs.

Then copied the cutouts over to the other oven. I tried to space them out as best as I could but the back element is very close to the back wall. I hope this is not going to be a problem.

I am heading to buy some high temp silicone to secure the elements in place and then wire them in series. They are rated for 650W 60V so 4 will do the job.

Ill keep you posted:)

floobydust · « **Reply #57 on:** February 28, 2018, 06:35:46 pm »

I use an open source Arduino with RocketScream Reflow Oven Controller Shield. It is discontinued but the sketch and schematic are very simple. Replaced by the Tiny Reflow Controller using dedicated ATtiny1634.
Point is, using Arduino you can change the software to your exact needs. It's a basic state-machine.
Avoid crapola MAX6675 thermopcouple-to-digital IC, it is terrible and picks up hum, cellphone RF etc and causes your reflow profile to malfunction due to temp readings being noisy. The newer MAX31856 I have not tried.

doobedoobedo · « **Reply #58 on:** March 03, 2018, 01:12:26 am »

I used one of the ovens Aldi sell from time to time. Rolled my own controller from an arduino pro-mini, a MAX6675 (which works just fine), a little OLED and 3 buttons.

There's no real need for PID on these, mine samples the temperature and switches on or off at 2Hz. It can store several different programs (I use it for drying wood, curing resin and tempering steel as well as soldering). It could use a little more power and I have some extra elements which I'll install when I eventually get round to it

.

floobydust · « **Reply #59 on:** March 03, 2018, 02:13:32 am »

Anyone using a convection oven?

IconicPCB · « **Reply #60 on:** March 03, 2018, 02:40:59 am »

Yes

I am using Kambrook convection oven.

No changes to the controller. st it to 150C and let it run for 3 minutes, change the set point to 250C and watch the solder paste melt. When melted switch it off. Open and let the PCB cool down with the oven for a couple of minutes and then remove.
Handles leaded and lead free paste.
!.5kW heating element.From 150C to finished about a minute and a half.

floobydust · « **Reply #61 on:** March 03, 2018, 03:24:53 am »

I figured the fan would be better. Stir up and distribute the hot air better, as long as it doesn't blow off SMT parts.

IconicPCB · « **Reply #62 on:** March 03, 2018, 11:28:40 am »

The oven works by sharing heat with the dish it cooks.

The larger the thermal mass of the oven the more uniform the temperature.
The fan amplifies the thermal mass of the oven providing for a more uniform thermal profile.

jmelson · « **Reply #63 on:** March 03, 2018, 06:26:20 pm »

Quote from: floobydust on March 03, 2018, 03:24:53 am

I figured the fan would be better. Stir up and distribute the hot air better, as long as it doesn't blow off SMT parts.

I have a toaster oven that I use for reflow soldering. It has 4 linear elements, 2 above and 2 below the rack. It also has a fan for convection. I really have NOT noticed the fan does anything, and generally do not use it. It is probably way too low volume. Certainly NO WAY it would ever blow parts off the board!

Jon

IconicPCB · « **Reply #64 on:** March 03, 2018, 11:28:57 pm »

John....

Use the fan ....

even though it does not have the force especially since the elements are probably shorter wave length IR elements.

jmelson · « **Reply #65 on:** March 05, 2018, 05:03:11 am »

Quote from: IconicPCB on March 03, 2018, 11:28:57 pm

John....

Use the fan ....

even though it does not have the force especially since the elements are probably shorter wave length IR elements.

I've used the fan, and NOT used it. I can't find ANY DIFFERENCE in the finished boards. I was hoping it would even out temp variations in the oven, but I don't see that. it is a TINY little fan outside the oven, and may end up blowing a lot of outside air into the oven.

Jon

yiancar · « **Reply #66 on:** April 23, 2018, 12:13:56 pm »

My Controleo3 oven is finally done! Picture attached.

I have performed the learning cycle and it seems to be doing very well. The 240v conversion seems to work wonders.

I will be testing some PCBs with leaded paste. What paste do you guys use?

IconicPCB · « **Reply #67 on:** April 23, 2018, 01:38:22 pm »

Did you applythe gold reflective tape onto the glass door?
What is that product?

yiancar · « **Reply #68 on:** April 30, 2018, 12:19:39 am »

Quote from: IconicPCB on April 23, 2018, 01:38:22 pm

Did you applythe gold reflective tape onto the glass door?
What is that product?

This is called Reflect-A-Gold. You can have a look here on the details of how I insulated the oven.
http://www.whizoo.com/reflowoven

flasonsmts · « **Reply #69 on:** July 22, 2018, 01:11:39 pm »

the reason that you built a small DIY reflow oven is you want to learn the thoery of reflow oven?


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Author Topic: DIY reflow oven - suitable UK/EU candidates (Read 59160 times)

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