| Electronics > Beginners |
| Reflow oven controller colaobration |
| (1/2) > >> |
| FriedMule:
I have got an idea on an external universal controller that can be used without having to "taking apaaart" any oven. I was thinking if wee all together could put our heads together and construct a great controller we all can use? :-) My idea is that if we could build a electronical "veriac" with a heat sensor. It should function by a program that follow the four steps in the heating profile: 1) Voltage enough to the heating elements almost glows (Ramp to soak) 2) Turn down the voltage (Soak) 3) Voltage enough to the heating elements almost glows (reflow) 4 Turn off the oven and alarm for opening the door (cooling) All that can be done outside via the AC cable. The heat censor is maybe an other problem but could it be made wireless? |
| rstofer:
It just isn't a big deal to add an SSR to the internal wiring when disconnecting all the existing controls. You need to add insulation between the walls if you expect to get to temperature any time soon. This is a pretty decent controller. I have the previous version mounted in a metal box with the display connected remotely. http://www.rocketscream.com/blog/product/tiny-reflow-controller/ |
| FriedMule:
--- Quote from: rstofer on December 04, 2018, 04:25:59 pm ---It just isn't a big deal to add an SSR to the internal wiring when disconnecting all the existing controls. You need to add insulation between the walls if you expect to get to temperature any time soon. This is a pretty decent controller. I have the previous version mounted in a metal box with the display connected remotely. http://www.rocketscream.com/blog/product/tiny-reflow-controller/ --- End quote --- You are right but you loose all warranty by modifying your oven, you do also risk the problem from the IR heaters that can darken your PCB if the heat elements is allowed to glow fully. |
| sokoloff:
Losing the warranty on a ~$50 (or even $150) toaster oven would almost literally be the least of my worries in a project like this. |
| rstofer:
--- Quote from: FriedMule on December 04, 2018, 06:29:32 pm ---You are right but you loose all warranty by modifying your oven, you do also risk the problem from the IR heaters that can darken your PCB if the heat elements is allowed to glow fully. --- End quote --- I bought the Black & Decker InfraWave Toaster Oven for the very specific purpose of building a reflow oven. I never even thought about the warranty! Not a consideration! I have toasted bare PCBs and PCBs with soldermask with no damage whatsoever. The lamps are a long way away from the board. I usually buy MiniBoard PCBs from ExpressPCB (much more expensive than Chinese boards) and I can cook them on a GE hot plate I bought from Target. I just put the board on the hot plate, turn the heat all the way up and wait for the solder to flow. Then I use a pair of tweezers to remove the board before turning the hot plate off. The only requirement for the hotplate is that it be flat and without voided areas such that the entire board touches the plate. I use either method with equal success. |
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