Power Supply

Troubleshooting any electronic elements of the RigidBot

Power Supply

Postby jacobsdr » 01 Aug 2014, 16:56

In the G+ there has been lots of talk about the power supply. I was hoping to bring a little of the discussion here as well. I noticed my power supply getting extremely hot and then noticed my fan was not turning on. Well I opened it up and the fan wasn't even plugged in, additionally its mount was broken too. I know Marvin Stuart and Dennis Brown have done a lot of work with the power supply. I am going to modify the power supply cover to allow more airflow but I am also going to start looking into a replacement since Marvin said he monitored the power supply dropping all the way down to 14.9V, which is well outside it's 24V +-15% range that it says. Next I will come up with a list of sources for replacement power supplies. Since I have a rigidbot Big with dual extruders I will need at least 400W but a lot of people have been suggesting stepping it up a little to help out with warm up times, I mainly want it for a little more cushion.


https://plus.google.com/100675703457232 ... qb2J4we5CP (marvin's breakdown of the PSU)

https://plus.google.com/102831253296337 ... tijzkAUQDd (dennis's replacement of PSU)
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Re: Power Supply

Postby 3boysdad » 01 Aug 2014, 22:25

I'd save yourself the trouble and get yourself one of these guys.

http://www.ampflow.com/AmpFlow_400W_Power_Supply.htm

I used the 'remains' of my power supply and attached the cable from the original PS to this one. You'll have to keep in mind that the red/black wires are reversed. So attach the red cables to the V- and black to the V+ posts and you'll be fine.
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Re: Power Supply

Postby spiderdaddy » 01 Aug 2014, 22:58

I assume you have the S-400-24?
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Re: Power Supply

Postby jacobsdr » 02 Aug 2014, 00:47

3boysdad wrote:I'd save yourself the trouble and get yourself one of these guys.

http://www.ampflow.com/AmpFlow_400W_Power_Supply.htm

I used the 'remains' of my power supply and attached the cable from the original PS to this one. You'll have to keep in mind that the red/black wires are reversed. So attach the red cables to the V- and black to the V+ posts and you'll be fine.




Why did you select Amp Flow. I have seen others on ebay that looks very similar. I am trying to figure who makes a reliable one. Sounds like you already have this one. How many hours of use do you have on it?
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Re: Power Supply

Postby 3boysdad » 02 Aug 2014, 05:15

I selected the S-400-24 / Apex because well the distributor is only a 2.5 hour drive away from my house and I've seen other places that have indicated the supply is rock solid. I measured a consistent 24V from the device even under moderate load.

As far as using it on the RB? Sadly my board fried out b/c of the crappy PS prior to making the switch. However, I've been using this guy to power other things (ham radio) for a few weeks with zero problem.
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Re: Power Supply

Postby spiderdaddy » 02 Aug 2014, 09:32

It looks to me like a standard OEM part. http://www.amazon.de/Nunus-Netzteil-24V ... l+s-400-24

Barring rip-off copies my guess is that they are all from the same source.

Anybody have an opinion on that?
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Re: Power Supply

Postby greg » 07 Aug 2014, 13:06

I was actually thinking two classes of look-alikes are out there. The AmpFlow/MeanWell and the Nunu/no-brand that you find on eBay. Don't focus on the outer appearance, aluminum chassis like that probably come out of 100 different manufacturers, it's the cheapest way to make an enclosure. There's about a $50 price gap between those two groups of PSUs, and the stats are just a hint different in a few places.

I ordered a no-brand and it arrived DOA. I opened it up and it may have taken some shipping damage - the heavy transformer coil had ripped it's solder pads off. But it also had some pretty poor looking solder work underneath. I found some cold solder joints and a short from a too long lead. So I reworked/repaired and I've been running it on my Big for a week or so now with good results. Even the $30 ones are better than the stock, but I think the 3x higher price on the AmpFlow / MeanWell may actually come with a step up in workmanship. Just a hunch.
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Re: Power Supply

Postby mavgrab302 » 17 Aug 2014, 04:17

sucks to get something new and things be falling out..my fan seems to be working fine but oddly after printer has been off and sitting the fan still comes on intermittently..just odd to me, but it stays on when printing
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Re: Power Supply

Postby jacobsdr » 12 Oct 2014, 01:28

My fan did that as well on the IAP PSU. Here is a link following up on my PSU replacement.

https://plus.google.com/106025678388869 ... riTf346w6b
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