Reflow Oven: Difference between revisions

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(Status update, parts list is junk)
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== Status ==
== 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.
Oven has been acquired. It is a cheap 1kW Everglades toaster oven and has been able to do very crude reflow.
First components for the controller have been ordered.
A prototype for the controller has been built and successfully measures temperature. I (smeding) am currently hammering out the PID loop to keep it at a fixed temperature. After that, all it needs is a little bit of UI and we should be good to go.
 
== 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
|-
 
| [http://nl.farnell.com/texas-instruments/ads1118idgsr/adc-16bit-temp-sensor-10msop/dp/1947871 1947871] || ADS1118 || thermocouple amplifier, ADC and reference || € 5.21
|-
 
| [http://nl.farnell.com/_/sonde890/probe-thermocouple-k/dp/4283831 4283831] || SONDE890 || Type K thermocouple itself ||  € 4.76
|-
 
| [http://nl.farnell.com/labfacility/im-k-lcf/socket-mini-single-sprung-type/dp/8598282 8598282] || - || Type K thermocouple connector
|-
 
| - || - || 16x2 LCD display || around €3
|-
 
| [http://nl.farnell.com/stmicroelectronics/bta41-600brg/triac-40a-600v-top-3/dp/1057288 1057288] || BTA41-600BRG || Beefy TRIAC for heater switching || € 4.66
|-
 
| [http://nl.farnell.com/isocom/is620x/optocoupler-dip-6-triac-o-p/dp/1683241 1683241] || IS620X || optocoupler triac driver || € 0.49
 
|}

Revision as of 20:54, 3 March 2013

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 and has been able to do very crude reflow. A prototype for the controller has been built and successfully measures temperature. I (smeding) am currently hammering out the PID loop to keep it at a fixed temperature. After that, all it needs is a little bit of UI and we should be good to go.

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