Difference between revisions of "Reflow Oven"

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(Started specifying parts)
Line 11: Line 11:
 
We probably want the following from an oven:
 
We probably want the following from an oven:
 
* Small volume: 15L-ish
 
* Small volume: 15L-ish
* High power: 2kW-ish, preferrably top and bottom elements
+
* High power: 2kW-ish, preferrably top and bottom elements1
 
* With exhaust fan if possible, as we'd need one anyway
 
* With exhaust fan if possible, as we'd need one anyway
  
Line 17: Line 17:
 
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.
 
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.
 
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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 +
{|
 +
|+ Preliminary parts spec
 +
|-
 +
 +
! Farnell order no. !! Type number !! Description !! Cost
 +
|-
 +
 +
| [http://nl.farnell.com/analog-devices/ad8495armz/ic-thermocouple-k-w-comp-8msop/dp/1864707 1864707] || AD8495ARMZ || Type K thermocouple amplifier and compensator || € 6.82
 +
|-
 +
 +
| [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
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|-
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| - || - || 16x2 LCD display | around €3
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|-
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| [http://nl.farnell.com/vishay-formerly-i-r/irfp15n60lpbf/mosfet-n-600v-15a-to-247ac/dp/8658404 8658404] || IRFP15N60LPBF || Beefy N-channel MOSFET for switching the heating element
 +
|}

Revision as of 20:48, 17 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.

Donators

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.

  • smeding can contribute about €20

Oven

Haven't hunted around that much, but current best choice seems to be 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

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
1864707 AD8495ARMZ Type K thermocouple amplifier and compensator € 6.82
4283831 SONDE890 Type K thermocouple itself € 4.76
8598282 - Type K thermocouple connector
- - around €3
8658404 IRFP15N60LPBF Beefy N-channel MOSFET for switching the heating element