Heated bed unintentionally cooled power supply fan

[scottadams]

I stumbled on an issue that some of you might have. I keep my power supply inside the printer footprint under one side of the heated bed. I was moving the supply while heating up the bed and noticed the temperature spiking. Turns out my hand was covering the exhaust fan, which was keeping the comparatively cool exhaust from blowing directly on the underside of the heated bed and cooling it down! Instead of my bed heating to 65C in over 10 minutes, now it's down to about 3.5 minutes after adding a simple piece of cardboard to divert the air outside my printer footprint. Obviously I'll have to 3D print a better solution than a slanted piece of cardboard! If it matters, I have no insulation under my heat bed yet and haven't yet tried heating above 65C.

[macgyver03]

Scott,

You may want to mount your supply like I have it in mine. It will still cool a little when its in from of the supply, but the exhaust is straight out of the back.  If your interested I can put the files onto Thingiverse, but I am pretty lazy about loading files I don't think other will use.

[scottadams]

Thanks for the offer, but I've already designed and printed something. It's mounted on the side of the printer, but I've got my printer turned 90° currently so in effect the fan is pointing out the back.

I was mostly posting the above in case someone had mysterious cooling or suspiciously long bed heating times and missed the obvious problem like I did.

[3DprintedLife]

Mar 25, 2016 1:56:31 GMT scottadams said:

Thanks for the offer, but I've already designed and printed something. It's mounted on the side of the printer, but I've got my printer turned 90° currently so in effect the fan is pointing out the back.

I was mostly posting the above in case someone had mysterious cooling or suspiciously long bed heating times and missed the obvious problem like I did.

View Attachment

I really like those brackets! Would you mind posting them somewhere so others (myself included) can print them out!

[scottadams]

Glad you like them, I think they turned out well too. I went ahead and put up my first Thingiverse file: thing:1445049. In case you don't like Thingiverse, here's the files:

Power Supply Bracket v5.step (85.62 KB)
Power Supply Bracket v5.stl (79.86 KB)

[tonyv]

macgyver03,  would you mind posting your power supply brackets here or on thingiverse, I would like to mount my PS like you have in the pic.

Thanks

Tony V.