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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. |
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| == Controller ==
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| 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.
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| 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.
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| {|
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| |+ Preliminary parts spec
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| ! Farnell order no. !! Type number !! Description !! Cost
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| | [http://nl.farnell.com/texas-instruments/ads1118idgsr/adc-16bit-temp-sensor-10msop/dp/1947871 1947871] || ADS1118 || thermocouple amplifier, ADC and reference || € 5.21
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| | [http://nl.farnell.com/_/sonde890/probe-thermocouple-k/dp/4283831 4283831] || SONDE890 || Type K thermocouple itself || € 4.76
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| | [http://nl.farnell.com/labfacility/im-k-lcf/socket-mini-single-sprung-type/dp/8598282 8598282] || - || Type K thermocouple connector
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| | - || - || 16x2 LCD display || around €3
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| | [http://nl.farnell.com/stmicroelectronics/bta41-600brg/triac-40a-600v-top-3/dp/1057288 1057288] || BTA41-600BRG || Beefy TRIAC for heater switching || € 4.66
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| | [http://nl.farnell.com/isocom/is620x/optocoupler-dip-6-triac-o-p/dp/1683241 1683241] || IS620X || optocoupler triac driver || € 0.49
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| |}
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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.
