|
Hanaldo
|
|
|
Group: Forum Members
Posts: 2.5K,
Visits: 28K
|
Just look at any replacement fan and motor unit for any model oven and adapt it to fit your oven. The thing you need is a fan mounted on an extended shaft so that you can have the motor mounted externally to the oven.
|
|
|
|
|
janardian
|
|
|
Group: Forum Members
Posts: 15,
Visits: 105
|
+xJust look at any replacement fan and motor unit for any model oven and adapt it to fit your oven. The thing you need is a fan mounted on an extended shaft so that you can have the motor mounted externally to the oven. I see, thanks!!
|
|
|
|
|
Steve Broad
|
|
|
Group: Forum Members
Posts: 408,
Visits: 4.1K
|
Are you still thinking of building an autoclave? If so, I strongly suggest that you don't! For example, a 1m x 1m x 1m oven would experience, at only 1 atmosphere of pressure (around 14 .7psi and what can be achieved using a vacuum bag), 134,000lb of force! Basically a home made bomb !!!
|
|
|
|
|
janardian
|
|
|
Group: Forum Members
Posts: 15,
Visits: 105
|
+xAre you still thinking of building an autoclave? If so, I strongly suggest that you don't! For example, a 1m x 1m x 1m oven would experience, at only 1 atmosphere of pressure (around 14 .7psi and what can be achieved using a vacuum bag), 134,000lb of force! Basically a home made bomb !!! No just an oven! I messed up in some of the wording - and yeah I agree that would be very dangerous to DIY with no experience! We use vacuum bags and the oven for curing. Since we're a student club with very little resources, the prepreg we get is usually donated by a company and that dictates the cure cycle and temperature; autoclave would be ideal but yeah impractical, so we are currently using a makeshift oven. We're trying to find benefactors who might donate out of autoclave prepreg instead, since that seems a lot more reasonable!
|
|
|
|
|
Steve Broad
|
|
|
Group: Forum Members
Posts: 408,
Visits: 4.1K
|
+x+xAre you still thinking of building an autoclave? If so, I strongly suggest that you don't! For example, a 1m x 1m x 1m oven would experience, at only 1 atmosphere of pressure (around 14 .7psi and what can be achieved using a vacuum bag), 134,000lb of force! Basically a home made bomb !!! No just an oven! I messed up in some of the wording - and yeah I agree that would be very dangerous to DIY with no experience! We use vacuum bags and the oven for curing. Since we're a student club with very little resources, the prepreg we get is usually donated by a company and that dictates the cure cycle and temperature; autoclave would be ideal but yeah impractical, so we are currently using a makeshift oven. We're trying to find benefactors who might donate out of autoclave prepreg instead, since that seems a lot more reasonable! Phew! :-) You are using autoclave prepreg in an oven? What are the results like? Any photos? Where are you?
|
|
|
|
|
janardian
|
|
|
Group: Forum Members
Posts: 15,
Visits: 105
|
+x+x+xAre you still thinking of building an autoclave? If so, I strongly suggest that you don't! For example, a 1m x 1m x 1m oven would experience, at only 1 atmosphere of pressure (around 14 .7psi and what can be achieved using a vacuum bag), 134,000lb of force! Basically a home made bomb !!! No just an oven! I messed up in some of the wording - and yeah I agree that would be very dangerous to DIY with no experience! We use vacuum bags and the oven for curing. Since we're a student club with very little resources, the prepreg we get is usually donated by a company and that dictates the cure cycle and temperature; autoclave would be ideal but yeah impractical, so we are currently using a makeshift oven. We're trying to find benefactors who might donate out of autoclave prepreg instead, since that seems a lot more reasonable! Phew! :-) You are using autoclave prepreg in an oven? What are the results like? Any photos? Where are you? We're from UCLA and we're competing this year at the SAMPE student bridge contest! Although this is our third year participating, this is the first time we are trying to be fully self-sufficient! I will post pictures and updates soon!
|
|
|
|
|
Steve Broad
|
|
|
Group: Forum Members
Posts: 408,
Visits: 4.1K
|
+x+x+x+xAre you still thinking of building an autoclave? If so, I strongly suggest that you don't! For example, a 1m x 1m x 1m oven would experience, at only 1 atmosphere of pressure (around 14 .7psi and what can be achieved using a vacuum bag), 134,000lb of force! Basically a home made bomb !!! No just an oven! I messed up in some of the wording - and yeah I agree that would be very dangerous to DIY with no experience! We use vacuum bags and the oven for curing. Since we're a student club with very little resources, the prepreg we get is usually donated by a company and that dictates the cure cycle and temperature; autoclave would be ideal but yeah impractical, so we are currently using a makeshift oven. We're trying to find benefactors who might donate out of autoclave prepreg instead, since that seems a lot more reasonable! Phew! :-) You are using autoclave prepreg in an oven? What are the results like? Any photos? Where are you? We're from UCLA and we're competing this year at the SAMPE student bridge contest! Although this is our third year participating, this is the first time we are trying to be fully self-sufficient! I will post pictures and updates soon! OK, look forward to seeing them. With regard to cheap prepreg - I have just received 11m2 of 270gsm prepreg for the cost of shipping only! The company had some out of date material that they couldn't sell. However, the storage life is similar to food storage Best Before times. The stuff remains usable for a lot longer than the 12 months stated. Maybe worth contacting local suppliers to see if they have any out of date OOA material they would be prepared to donate.
|
|
|
|
|
Barnsley-Bill
|
|
|
Group: Forum Members
Posts: 25,
Visits: 489
|
Hi I've just received my CN7800 pid controller and there is a small jumper in the box and download software ' how dose the pid controller receive data from the software and what is the jumper for as I can't see anywhere were it goes
Thanks
|
|
|
|
|
KOSTAS
|
|
|
Group: Forum Members
Posts: 30,
Visits: 244
|
+x+x+xbit of a late reply. But my curing oven is made from 100mm foil backed insulation board. with a piece of tilebacker on the base for durability and heat distribution I have wired two 2000w heating elements in series to bring power down to 500w and use a thermostat to regulate temperature. You could also use a PWM controller to regulate power. The fan motor is on the outside (would overheat inside). I use a tiny 12v van with a RC plane prop as a fan, connected through the walls. Thank you for your answer! every bit helps! Mine is made from ply sheet and 50mm insulation and silver foil. Heat is supplied by 4 separate circuits powering 150w bulbs. one of these circuits is connected to an adjustable thermostat, allowing me to control oven temps. Used an old metal desk fan with the motor in the wall :-) 
Old microwave glass for viewing progress. Controls and wiring is a little bit Heath Robinson, but it works and I might tidy it up some day (probably not :-) ) If you look between the rows of switches you can see some of the remote temp sensors that allow me to check that I am getting an even cook.
Oven built to take front clip of my car. It fits, just . Photo has loaded sideways for some reason :-(
 how it is called the internal silver lining and where should i look to find it ? thank you
|
|
|
|