Heated chamber air circulation fan
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@chris94 said in Heated chamber air circulation fan:
My favourite solution would be a simple fan motor outside the chamber
If the fan is outside the chamber where is it drawing air from? If it's drawing air from inside of the chamber that is at 110c then you'll be hard pressed to find a plastic construction fan and motor that would survive that. Best I've seen rated at 70c.
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@phaedrux the fan itself sits in the chamber and is connected to the motor by a shaft through the chamber. same principle as an oven fan
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@chris94 said in Heated chamber air circulation fan:
My current solution is a radial fan out of a temperature resisted filament.
What filament?
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@phaedrux 3dktop
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@chris94 said in Heated chamber air circulation fan:
3dktop
Wow, I've never heard of that before.
https://3dk.berlin/en/3dktop-heat-resistent/200-3dktop-white.html
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@phaedrux it's quite nice and not too expensive for its properties
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Well since you have the fan blade portion possibly solved, the external motor and it's control is where you're stuck?
How heavy is the shaft/blade? Do you have a normal fan you could cannibalize to attach to the shaft?
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@phaedrux the rotor itself is currently 16,54 Grams and the inertia is at 86,87 gcm². the shaft will be as small as possible and so not really heavy. cannibalize of some random fan would be possible but I don’t have one on hand and i would rather by a separate motor (less getto style)
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Buying a new motor for the task is going to be unnecessarily expensive when so many fans are available for pennies. I'd pick up an old desk fan at a garage sale, especially if it has a metal blade, and add a shaft coupler. You're not trying to control the speed, just stir the air, so all the controller has to do is switch it on and off. One of the controller's standard fan outputs can drive a small SSR to operate the fan. If you don't want it running very fast add a small speed controller and just set it to run slow.
Whenever you're running the chamber heater you probably want to run the fan, too, so you could just power the two from the same source.
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What about using a convection blower of an oven?
Used ones are really cheap and metal blades are included.... -
@diy-o-sphere all the cheap ones are loud but the bigger problem is that there is no space for one. under the chamber is a filament drawer so its not possible to mount something down there. i cant put something in the top part because of the motion system. so the only place left is at the back between the side panel and the cabel cover (95mm)
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