Can the regulation of the ATX PSU be improved? January 14, 2014 05:06PM |
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Re: Can the regulation of the ATX PSU be improved? January 14, 2014 05:57PM |
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Re: Can the regulation of the ATX PSU be improved? January 15, 2014 03:35AM |
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Re: Can the regulation of the ATX PSU be improved? January 15, 2014 04:57AM |
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Re: Can the regulation of the ATX PSU be improved? January 15, 2014 06:22AM |
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Re: Can the regulation of the ATX PSU be improved? January 15, 2014 06:59PM |
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reprappro
We would love to provide a better power solution, at reasonable cost, if there is one. Replacing the ATX power PCB with something better would be great, and a sensible and easy place to start. But... we're not electrical engineers! If there is a way for the power to be better managed, is there any chance you could come up with a schematic? We can prototype boards to test.
Re: Can the regulation of the ATX PSU be improved? January 15, 2014 07:48PM |
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Re: Can the regulation of the ATX PSU be improved? January 15, 2014 07:55PM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 04:29AM |
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bobc
Although the ATX PSU has a lot of benefits, one of the things they are not so good at is dumping loads of amps onto a 12V rail.
Re: Can the regulation of the ATX PSU be improved? January 16, 2014 05:05AM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 05:16AM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 05:22AM |
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Radian
OK, so I just pulled the case of a PC with some random cheap looking ATX PSU and dumped a 12V/50W halogen on a spare 5V drive plug. The 12V went up by 0.25V! This is interesting.
As a light, it would go on and off with the Heated bed and drive you batty!
Re: Can the regulation of the ATX PSU be improved? January 16, 2014 05:24AM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 05:47AM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 05:15PM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 05:54PM |
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Rory166
Just found overclock selling Alpine psu cheaper than ACE. 500w alpine less than 10 pound including vat.
Re: Can the regulation of the ATX PSU be improved? January 16, 2014 05:55PM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 06:06PM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 06:23PM |
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Re: Can the regulation of the ATX PSU be improved? January 16, 2014 08:25PM |
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Re: Can the regulation of the ATX PSU be improved? January 17, 2014 04:25AM |
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Re: Can the regulation of the ATX PSU be improved? January 17, 2014 04:38AM |
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Re: Can the regulation of the ATX PSU be improved? January 17, 2014 04:58AM |
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Radian
dc42, obviously there's a finite budget involved and one use for it might be to source a better PSU. I agree with you that very few qualities are critical for powering a 3D printer but there will always be "lowest common denominator" PSU's like RRP ship. Pitching into a slightly higher price bracket won't necessarily return a better PSU. Droop on the 12V rail is all we need to eliminate to give the freedom to print in all common plastics and if a generic fix can be engineered that works with the poorest of examples then we have full control of the most critical factor.
Re: Can the regulation of the ATX PSU be improved? January 17, 2014 05:03AM |
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This could be what we are looking for!Quote
Rory166
Hi All
Just had a breakthrough. There is a 3.3V sense wire (brown) disconnect this from 3.3 V in Ormerod power board and feed from 12 v via potential divider. No need to open PSU case. R1 220R R2 82R will hopefully be low enough impedance to feed 3.3v feedback. Values quickly calculated to give 12.15V at Power board.
Rory
Re: Can the regulation of the ATX PSU be improved? January 17, 2014 09:36AM |
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