Electronics > Projects, Designs, and Technical Stuff
power supply enclosure
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coppercone2:
keep in mind a metal chassis is better for electronics... plastic is cheap crap
exe:
As a teaser, enclosure for one of my power supplies. I'm doing load testing. As trannies can get hot I decided to go with PETG. It has better temperature rating than PLA, but has quite some flex. Most the bend on the picture is because bolt pulls the testplate inside. I think I just reinforce the mount area.

Why not anneal PLA: it shrinks :(. I didn't do it myself, but I watched videos, dimensional accuracy suffers a lot. It also shrinks differently in different axes. I have an idea how to avoid. I want just to leave it on hotbed at 80-90C for several hours in an enclosed space. But I'm yet to try this.
beanflying:

--- Quote from: exe on April 27, 2019, 07:20:40 am ---As a teaser, enclosure for one of my power supplies. I'm doing load testing. As trannies can get hot I decided to go with PETG. It has better temperature rating than PLA, but has quite some flex. Most the bend on the picture is because bolt pulls the testplate inside. I think I just reinforce the mount area.

Why not anneal PLA: it shrinks :(. I didn't do it myself, but I watched videos, dimensional accuracy suffers a lot. It also shrinks differently in different axes. I have an idea how to avoid. I want just to leave it on hotbed at 80-90C for several hours in an enclosed space. But I'm yet to try this.

--- End quote ---

CNCKitchen's Youtube channel has most of the good data on Annealing I have seen. There is now some lower shrinkage PLA's getting out there but they still shrink at different rates across or at 90 degrees to the layers  :--

Now I have all of my Printers in Enclosures I am going to get back to doing some ABS and more likely HIPS for enclosures for higher temps and stiffness over PETG. It's about 15 degrees today and with a single printer in my converted fridge it's 32 degrees away from the print bed (where the probe in shot is) and more like 35 directly over it. I will need to add some soft extraction for Summer use and also to help draw out any ABS nasties. Also apart from the Steppers all other electronics is being moved outside.
coppercone2:
:'(

That heavy transformer on a plastic plate. Come on, think of 1960 HP when you build stuff  :'(

1960:
Real chassis (can survive being rolled down steel from a 30MPH stop on top a hill that's like 4 stories high (and rolls down like 100 feet):

Aluminum frame (yes, frame, made of I-beam elements. The thing has a aluminum roll cage) with panels you screw on each side. Reinforcement bars made of aluminum rounds that have milled screw holes and milled aluminum I-beams for more reinforcement. Transformer with 6 rivets on a isolated back plate. Panel is thick enough that each screw hole has a chamfur drilled hole to hide the screw, and has a star washer in every hole. Use in mind : portable lab function generator powered by AC, used indoors. Obviously the wrong business decision, since HP pretty much survived for 60 years as a company and is still a industry leader (despite some renaming).

2020: Robot spits out weak decayed dinosaur remains that are melted together. Use: hang under all terrain vehicle. Ultimate design goal : how do we sell this thing using saran wrap, aluminum foil and spent bubble gum as a chassis (for military avionics use)? can we let this transistor run at 150C :palm: :treezcompany:


Wanna actually test your chassis: Try this: Put it on top of a car and do a sharp stop on a big hill with a long strait road infront of it. Have someone down below with a walki talki to make sure it does not hit a car. Have them wear a good safety helmet and goggles. (instead of fucking around with over powered tooth brush 'vibration test'. Yea its gonna need that testing if someone plugs it into a dildo.  :palm:
exe:

--- Quote from: coppercone2 on April 27, 2019, 03:51:12 pm ---
1960:
Real chassis (can survive being rolled down steel from a 30MPH stop on top a hill that's like 4 stories high (and rolls down like 100 feet)

--- End quote ---

ah, so, that was your piece of equipment :)
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