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Author Topic: Cutting the A4000 PSU housing  (Read 3064 times)

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Offline motorollinTopic starter

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Cutting the A4000 PSU housing
« on: March 13, 2007, 08:30:54 PM »
Hi all

I received a cable from Amigakit this morning which allows me to use a (micro-) ATX PSU to power my A4000. I have gutted the original PSU's housing so it's just an empty box with the power switch mounted on the front. I now want to cut a hole in the front (where the fan used to be) and on the side (adjacent to the hard drive) to allow me to tuck cables inside the original housing. This will give me more space in the A4000 case and also allow me to get the cables from the ATX PSU to the motherboard and drives. Can anybody offer any advice on the best way to cut the metal housing? I don't really have any specialist tools. I have a good drill with metal cutting bits and a hacksaw.

--
moto
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Offline keropi

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Re: Cutting the A4000 PSU housing
« Reply #1 on: March 13, 2007, 08:43:50 PM »
did you first try the mATX psu to make sure it works OK in amiga???
just load OS, with your normal rtg screenmode and try a "heavy" whdload game, like KID CHAOS ECS ... play it a little, _if_ there are probs you will see gfx corruption and eventually a crash...
that is my psu-test-game lol
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Offline alexh

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Re: Cutting the A4000 PSU housing
« Reply #2 on: March 13, 2007, 08:45:47 PM »
Make sure your MicroATX PSU is within Amiga tolerance levels for voltages under high load. (Amiga voltage tolerances are much tighter than PC).

Keropi found he was unable to use his uATX PSU with his A4000.
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Offline motorollinTopic starter

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Re: Cutting the A4000 PSU housing
« Reply #3 on: March 13, 2007, 08:48:13 PM »
Yes it works fine :-D I'm thinking that drilling 4 holes, one in each corner where I want the hole to be, then cutting between them will be the best way to remove a large piece of the housing. But what type of saw would be best?

--
moto
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Offline alexh

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Re: Cutting the A4000 PSU housing
« Reply #4 on: March 13, 2007, 09:16:58 PM »
I'd use a metal scissors cutter... something a bit like a wire cutter only bigger.
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Offline orange

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Re: Cutting the A4000 PSU housing
« Reply #5 on: March 13, 2007, 09:23:25 PM »
but why are you keeping original PSU casing? the switch? it should be easy making new one.
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Offline Zac67

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Re: Cutting the A4000 PSU housing
« Reply #6 on: March 13, 2007, 09:33:15 PM »
Nibble pliers (?) are also nice for cutting arbitrary holes into thin metal.
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Offline motorollinTopic starter

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Re: Cutting the A4000 PSU housing
« Reply #7 on: March 13, 2007, 09:35:48 PM »
@alexh
Would they make the edges of the cut-away piece bend outwards as they cut?

@orange
I'm keeping it because it supports one side of the hard drive bracket. I think it will be easier to adapt it for my needs than to make a new one from a sheet of metal.

--
moto
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Offline motorollinTopic starter

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Re: Cutting the A4000 PSU housing
« Reply #8 on: March 13, 2007, 09:39:07 PM »
@Zac67
Thanks for the suggestion. Unfortunately they are only suitable for metal up to 1.2mm thick. The A4000 PSU casing is quite a bit thicker than that.

--
moto
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Offline keropi

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Re: Cutting the A4000 PSU housing
« Reply #9 on: March 13, 2007, 10:02:08 PM »
I used an electrical hand grinder with an INOX cutting disk (because it is thin)


motorolin, try to post a pic and model/make of your good working mATX psu... it will be handy!
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Offline keropi

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Re: Cutting the A4000 PSU housing
« Reply #10 on: March 13, 2007, 10:05:01 PM »
or use "hole saws" for metal , they come in different diammeters but are somewhat expensive... u just attach them to a driller or electrical screwdriver



ah, the joys of having a father that owns an INOX works factory....  :lol:
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Offline motorollinTopic starter

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Re: Cutting the A4000 PSU housing
« Reply #11 on: March 13, 2007, 10:09:43 PM »
Would you use that tool to cut holes then use something else to cut between them?

--
moto
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10  IT\'S THE FINAL COUNTDOWN
20  FOR C = 1 TO 2
30     DA-NA-NAAAA-NAAAA DA-NA-NA-NA-NAAAA
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50  NEXT C
60  NA-NA-NAAAA
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80  GOTO 10
 

Offline keropi

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Re: Cutting the A4000 PSU housing
« Reply #12 on: March 13, 2007, 10:27:04 PM »
of course, you can cut 2 holes on the 2 edges, and then with the hand grinder connect them...
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Offline amazing

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Re: Cutting the A4000 PSU housing
« Reply #13 on: March 13, 2007, 11:14:01 PM »
when i see all those tools i get a bit scary
u can also use a dremel with cutting disc on it
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Offline keropi

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Re: Cutting the A4000 PSU housing
« Reply #14 on: March 14, 2007, 06:47:11 AM »
moto:

don't forget to give detailed description of this mATX that works!
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