Reflow Oven: Difference between revisions

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(Replaced the thermocouple compensator with the new pick with built-in ADC)
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Because modern electronics components are tending more and more towards becoming SMD-only, and because the associated size reduction can also be very useful for space projects, we need a reflow oven.
Because modern electronics components are tending more and more towards becoming SMD-only, and because the associated size reduction can also be very useful for space projects, we need a reflow oven.


== Donators ==
== Status ==
The current direction the project seems to be going (buying a new oven and modding it) we are going to need a little more funds than I (smeding) can provide on my own. 100 EUR should be more than enough to cover everything, to give an idea of the funds needed. Better budget will come when decisions and designs are finalised.
Oven has been acquired. It is a cheap 1kW Everglades toaster oven. It remains to be seen if it is powerful enough to reflow in a sensible amount of time.
 
First components for the controller have been ordered.
* smeding can contribute about €20
 
== Oven ==
Haven't hunted around that much, but current best choice seems to be [http://www.block.nl/article/getArticleDetails?artNr=83550 this]. We can do cheaper if we find something second-hand. Feel free to add suggestions.
 
We probably want the following from an oven:
* Small volume: 15L-ish
* High power: 2kW-ish, preferrably top and bottom elements1
* With exhaust fan if possible, as we'd need one anyway


== Controller ==
== Controller ==

Revision as of 18:27, 27 November 2011

Because modern electronics components are tending more and more towards becoming SMD-only, and because the associated size reduction can also be very useful for space projects, we need a reflow oven.

Status

Oven has been acquired. It is a cheap 1kW Everglades toaster oven. It remains to be seen if it is powerful enough to reflow in a sensible amount of time. First components for the controller have been ordered.

Controller

To be constructed. Will probably consist of a large triac to switch the heating element and a fan on and off in a control loop with a thermocouple. We still need a decent fan to speed up the cooling phase. Needs to be able to withstand rather high temperatures, something from an oven would be ideal.

Preliminary parts spec
Farnell order no. Type number Description Cost
1947871 ADS1118 thermocouple amplifier, ADC and reference € 5.21
4283831 SONDE890 Type K thermocouple itself € 4.76
8598282 - Type K thermocouple connector
- - 16x2 LCD display around €3
1057288 BTA41-600BRG Beefy TRIAC for heater switching € 4.66
1683241 IS620X optocoupler triac driver € 0.49
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