Reflow Oven


  • Hero Member

    One thing to note. I was getting worried after the 6th time it failed on learning, not reaching soak time fast enough...

    The aluminum tray I had was a perfect fit, I mean perfect. Turns out is was so perfect that it was blocking a lot heat. After trimming the tray and notching the back corners out, its has worked perfect since..


  • Admin

    Nice :thumbsup::thumbsup::thumbsup:


  • Contest Winner

    @ServiceXp

    Very nice... you hardware guys have all the fun!

    So the question is what's next for me... Surface Mount or 3D printing?


  • Admin


  • Admin

    @hek

    Now I know what to ask santa for next year :) That's a VERY cool machine..



  • @ServiceXp

    Hi,

    I really appreciate your comments and build-notes, both here and on the KS thread, too.

    Like you, I find the B&D TO1675B an attractive model for turning into a reflow oven.

    A few questions (don't worry most are Yes/No, or short answer!):

    How well does your larger oven work?
    Does it have <some reasonable amount> of excess up-slope heating capacity? Meaning, does it have any trouble getting up to temp, quickly enough? (My concern is 'barely' being able to run a lead-free profile. Like you, I would insulate the shell).

    Do you remember the size/dimensions of PCB support plate you made (so I can get one made-to-order)?
    Was one roll of the Reflect-A-Gold tape enough? I get that this is a labor-intensive step!
    Ever done several boards at once? Any consistency or 'even-heating' problems?
    Do you have any real feel for whether having a convection-type oven makes a difference... is the heating any more uniform?

    Thanks again for any insights you can offer.

    Ken



  • @Kenski

    I built a reflow oven using a ControLeo2 a few months ago, and I used a larger Farberware convection oven I got from Walmart for $40.

    It seems to work well so far, but I still need to capture the data from it on a run and see how it compares to the ideal profile. It seems to be a bit slow to me, but the ControLeo2 isn't complaining. It does seem like it's not that easy to find ovens which are both on the small side and come with a convection fan, which to me was essential. I reflow a lot of boards at once and I need uniform heating throughout the oven, and this oven does that.

    One roll of Reflect-a-Gold was not enough. I used one sheet of Thermo-Tec heat barrier, cut in half, for the top and bottom. This was the perfect size for this oven, and the top part hasn't had any trouble with the adhesive. However, despite only needing to cover the back, sides, and door, I needed a second roll of the Reflect-A-Gold.

    My next two projects are to capture the data from a run, and to add a servo to open the door. I've got the servo now, I just need to find a pushrod and figure out how to hook it up.


  • Hero Member

    Ken,
    Man I'm sorry, somehow I missed your post... :-(

    1 The setup above works very well, I have no complaints, I would like a little more flexibility in profile options, but outside of that works well.

    2 I can use this oven with the oven at 10F outside. No problems getting to the target profile temps.

    3 8.5"x 11-7/8"

    4 1 Roll was "just enough".

    5 No, single only

    6 I would NOT build one of these oven without the convection fan. That said I don't have any experience with a standard oven ;-)

    @Kenski said:

    @ServiceXp

    Hi,

    I really appreciate your comments and build-notes, both here and on the KS thread, too.

    Like you, I find the B&D TO1675B an attractive model for turning into a reflow oven.

    A few questions (don't worry most are Yes/No, or short answer!):

    How well does your larger oven work?
    Does it have <some reasonable amount> of excess up-slope heating capacity? Meaning, does it have any trouble getting up to temp, quickly enough? (My concern is 'barely' being able to run a lead-free profile. Like you, I would insulate the shell).

    Do you remember the size/dimensions of PCB support plate you made (so I can get one made-to-order)?
    Was one roll of the Reflect-A-Gold tape enough? I get that this is a labor-intensive step!
    Ever done several boards at once? Any consistency or 'even-heating' problems?
    Do you have any real feel for whether having a convection-type oven makes a difference... is the heating any more uniform?

    Thanks again for any insights you can offer.

    Ken


  • Hero Member

    These ovens are killing me here. No matter where I look I can't seem to find a convection oven at a reasonable price with quartz elements. It's either one or the other, or crazy prices or ridiculously large volumes that will take ages to heat without the addition of extra heating elements.

    Here are my candidates so far:

    http://www.amazon.it/Ariete-Cousine-Petit-Forno-Elettrico/dp/B004JLN2EW
    10 litres, 1000w. Quartz. High W for the volume if it checks out.

    http://www.amazon.co.uk/gp/product/B00K22YJEY
    9 litres, 800w. Quartz. Looks a lot like the one Rocketscream used with great success.

    http://www.harald-nyborg.se/wasco-miniugn-18l-1380w.html
    18 litres, 1380W. Not quartz? But can be found locally. A bit low wattage for the volume.


  • Hero Member

    Not sure you need quarts elements



  • Hi, here is another ControLeo2 reflow oven for european users :)

    Korona reflow oven – 02:57
    — StaringLizard

    Regards,
    StaringL


  • Hero Member

    @Staringlizard Cool! Is it this oven you're using? 14L, 1200W? Are you happy with the temperature ramp-up time?



  • I have been looking at the ControLeo for a while.
    I already have an oven which I use for baking wet snuff.
    Today it has three DS18bB20 sensors which needs to be replaced. And I will try to get the sketch working on a Nano.
    Then will need two Nanos, one for board baking and one for baking snuff.

    Have anyone run the sketch on an ATMega328?


  • Admin

    Peter Easton, the ControLEO inventor, is about to release a servo-based automatic oven-door opener that will use the 4th relay to open the door at the end of the reflow cycle. I saw a prototype when I visited him recently but he is planning to launch it at the Maker Faire in San Francisco, CA this Thu/Fri, I plan to pick one up when I visit his booth.


  • Hero Member

    @blacey I'm hoping, at some point, he offers upper and lower temperature zones and stored temperature profiles.. That would place his product far ahead of the rest.


  • Admin

    @ServiceXp Have you sent that request directly to Peter? He is pretty responsive to suggestions...


  • Hero Member

    @blacey Yes Sir.


  • Hero Member

    So, my reflow build is coming along ... slowly. Looking into plotting curves on a larger LCD, like the Zallus oven and using a small servo or stepper motor to open the door.

    One thing that is bugging me though is the reflect-a-gold tape. Costs a fortune and I can't even seem to find any or even an equivalent product in Sweden. What do you guys think about the Ebay / Ali knockoffs? Are they good enough? I mean I don't care if they fall short a few percent in heat reflection, I'm not building a spaceship here, as long as the adhesive holds up.


  • Hero Member

    @bjornhallberg said:

    So, my reflow build is coming along ... slowly. Looking into plotting curves on a larger LCD, like the Zallus oven and using a small servo or stepper motor to open the door.

    One thing that is bugging me though is the reflect-a-gold tape. Costs a fortune and I can't even seem to find any or even an equivalent product in Sweden. What do you guys think about the Ebay / Ali knockoffs? Are they good enough? I mean I don't care if they fall short a few percent in heat reflection, I'm not building a spaceship here, as long as the adhesive holds up.

    Not sure, but I think maybe the more important characteristic is it's "Sticky Power" :stuck_out_tongue: You don't want the tape coming loose..



  • @bjornhallberg Sorry for late reply :(, I forgot about my post and did not get any update on mail. But yes, the link you posted is correct :)
    I have not checked it very thoroughly yet, but so far it gets the job done with the automatic calibration from ControLeo. I even put a board in the oven 3-4 times without anything breaking.


Log in to reply
 

Looks like your connection to MySensors Forum was lost, please wait while we try to reconnect.