TomDesign (05/12/2016)
so guys i simply need to make big owen correct? any help what is needed?Yes..
You can make it as simple or as complex as you want.. The better is it insulted the less power it needs is obvious. But there are a few things you need to do and not cut corners.
You need a duct with a fan that is driven independently of the heater element. You can still run a cheap heater but you need to rewire it to let the fan run from its own power cable. Also use a fan that can take higher temperatures as most chinese heaters have a thermal cut out on the fan motor that will not let you run at the temperatures you want..
http://www.ebay.co.uk/itm/High-Temperature-Extractor-Fan-VA-16-2-/221929876966?hash=item33ac0d2de6:g:WOEAAOSwj0NUfHGaThe duct needs to force air to flow through the whole oven. So I have it pulling air from the front of the oven across the door. It is ducted to the back corner and blows up to the roof of the oven so the air has to go corner to corner..
The box can be MDF and expanded foam insulated (kingspan) if you want and just use a sliding door of MDF. It will lose some heat if you do this (I have but I have a lot of old sheets and blankets draped over the door to keep the heat in as much as possible).
Then you need to have a controller as it makes your cure repeatable with every cure cycle.. you can get ramp and dwell controllers from eBay if you want to just get going. They are called re-work station controllers and do need some thought as the timers work in seconds not minutes or hours. Plus you need to add a on off switch to the control panel or the controller will not work, I think the Omega ones do this too, but their instructions are better than the ALTEC PC410 instructions. Wire the controller to a relay (mine is 40amp) to turn the heater element on and off.
http://www.ebay.co.uk/itm/Altec-Pc410-Temperature-Controller-Panel-For-Bga-Rework-Station-Rs232-Module-O-/122009754612?hash=item1c68591bf4:g:dmsAAOSwImRYIlZw After that all you need is to plumb in some vacuum pipes....