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paul.m27
(@paul-m27)
Honorable Member
Re: Power Supply failure


I would be curious to know if most of the power supply failures have been on 110v or 230v ?
Maybe there is something in that, don’t know.

...

Jason.

Mine is 110V.

Posted : 30/01/2018 3:46 am
paul.m27
(@paul-m27)
Honorable Member
Re: Power Supply failure


Wouldn't worry too much, how many blown PSU vs Units shipped? Unfortunately it's the nature of the beast, I've had a PSU's blow on me on another printer. These Power Supplies were never designed for 3D Printers. If anything the Prusa PSU, has a an advantage as it appears to be a customized part for their load requirements vs a generic LED PSU which some aren't always equipped for the load. Not to mention (unlike most Chinese printers), there is a warranty on the part.

Agreed, I've had one blow and the replacement is defective, and I'm not worried about it. Neither failure (nor any other I've seen) damaged anything else, and a PSU swap is easy enough (although I've done it enough that I keep my PSU wire management separate from the rest of the wires).

At this point, if I was in a situation where I couldn't afford to be down for a week while the warranty item ships, I would keep a spare PSU around. They are available for $20 or so.

Posted : 30/01/2018 3:51 am
nathan0876
(@nathan0876)
Estimable Member
Re: Power Supply failure



Wouldn't worry too much, how many blown PSU vs Units shipped? Unfortunately it's the nature of the beast, I've had a PSU's blow on me on another printer. These Power Supplies were never designed for 3D Printers. If anything the Prusa PSU, has a an advantage as it appears to be a customized part for their load requirements vs a generic LED PSU which some aren't always equipped for the load. Not to mention (unlike most Chinese printers), there is a warranty on the part.

Agreed, I've had one blow and the replacement is defective, and I'm not worried about it. Neither failure (nor any other I've seen) damaged anything else, and a PSU swap is easy enough (although I've done it enough that I keep my PSU wire management separate from the rest of the wires).

At this point, if I was in a situation where I couldn't afford to be down for a week while the warranty item ships, I would keep a spare PSU around. They are available for $20 or so.

Im not to worried about it in the i wont get a replacement sense, or even the they are using super sub par cheap Chinese PSU sense, as they arnt(although i still believe its a design flaw to have it running at %100 output for warmup/startup). Customer service is great, one of the reasons i went Prusa was for not only the company support but community support which IMO is outstanding from what i have seen.

Im more worried about it in the that replacement is literally on the other side of the planet from me sense, so shipping time and therefore downtime is a large concern to me not just for this part but for the many parts that seem to have teething issues so far(fan shrouds melting when printing ABS/ PC/ Nylon, feed gears rusting, loud bearings, soft non hardened rods shipped instead of hardened rods, misaligned belts, etc).

Downtime is my main focus of concern at this time from my last 2 weeks monitoring these forums. Which is why im going to address as many of these issues as possible as soon as i get it setup and running by printing parts i may need(replacement fan shrouds, PSU brace for running a PSU not mounted on the printer, etc) So i have spare parts already on hand for any failures or issues that may occur, as after they occur may be to late to print parts. And having them on hand beats waiting for shipping from other side of planet.

Im glad there are cheap PSU alternatives available.

Posted : 30/01/2018 8:07 pm
paul.m27
(@paul-m27)
Honorable Member
Re: Power Supply failure


Im glad there are cheap PSU alternatives available.

Full disclosure, although there are inexpensive 240W PSUs available, I went with a 350W MeanWell that was well recommended, about $50. This is why I need the different PSU mount approach. Some of the 240W units might have had holes that lined up with the frame.

With two dead Prusa PSU's, my leaning is to stick with the MeanWell and use the 2nd Prusa replacement (when it comes) as a backup.

Posted : 30/01/2018 9:05 pm
JMcK
 JMcK
(@jmck)
Reputable Member
Re: Power Supply failure


Im more worried about it in the that replacement is literally on the other side of the planet from me sense, so shipping time and therefore downtime is a large concern to me not just for this part but for the many parts that seem to have teething issues so far.

I hear you, but at least Prusa is Open Source Hardware, so in a pinch, you should be able to source most of the parts, not just the power supply. I’m currently dealing with a dead proprietary printer. I backed the company because they are just a few hours drive from my home. The thing is an unreliable POS; it’s been down awaiting parts shipping for more days than it has been up in the 3+ months I’ve had it. The part I currently need is on backorder with a late March ETA.

I guess all I’m saying is “the other side of the planet” isn’t necessarily something that should be a major worry.

When someone asks you if you're a god, you say, "YES!"

Posted : 31/01/2018 12:44 pm
Peter L
(@peter-l)
Honorable Member
Re: Power Supply failure



Im more worried about it in the that replacement is literally on the other side of the planet from me sense, so shipping time and therefore downtime is a large concern to me not just for this part but for the many parts that seem to have teething issues so far.

I hear you, but at least Prusa is Open Source Hardware, so in a pinch, you should be able to source most of the parts, not just the power supply. I’m currently dealing with a dead proprietary printer. I backed the company because they are just a few hours drive from my home. The thing is an unreliable POS; it’s been down awaiting parts shipping for more days than it has been up in the 3+ months I’ve had it. The part I currently need is on backorder with a late March ETA.

I guess all I’m saying is “the other side of the planet” isn’t necessarily something that should be a major worry.

Let's also take a moment to think of those people who spent $K for a premium Type A printer with lots of proprietary parts, only to see them go out of business with no warning.

I don't have anything against proprietary printers--both of my current printers are from TierTime--but each has its plusses and minuses. My TierTime printers are great workhorses for the money, but if the manufacturer ever stopped supporting them, they would be paperweights as soon as the first critical part broke.

Posted : 31/01/2018 5:31 pm
nathan0876
(@nathan0876)
Estimable Member
Re: Power Supply failure



Im more worried about it in the that replacement is literally on the other side of the planet from me sense, so shipping time and therefore downtime is a large concern to me not just for this part but for the many parts that seem to have teething issues so far.

I hear you, but at least Prusa is Open Source Hardware, so in a pinch, you should be able to source most of the parts, not just the power supply. I’m currently dealing with a dead proprietary printer. I backed the company because they are just a few hours drive from my home. The thing is an unreliable POS; it’s been down awaiting parts shipping for more days than it has been up in the 3+ months I’ve had it. The part I currently need is on backorder with a late March ETA.

I guess all I’m saying is “the other side of the planet” isn’t necessarily something that should be a major worry.

True enough, and it seems from a quick amazon search you can get a suitable PSU for $35-45 anyways if it came down to it and i needed it NOW, with sameday shipping.

Posted : 31/01/2018 6:25 pm
sean.s8
(@sean-s8)
Active Member
Re: Power Supply failure

So my PSU just failed. Nothing as dramatic, but about 30 minutes into a typical ABS print with stock Slic3r settings I head a small pop and the printer was dead. I verified the fuse was blown and was hopeful that was the extent of the problem.

Unfortunately when I replaced the fuse, I powered on the printer and nothing happened. There was a *very faint burning smell so I immediately disconnected power. I have not disassembled the PSU and will not until I get shipment verification from Prusa and I cannot see what failed through the guarding but I will update when I do.

Posted : 01/02/2018 5:52 pm
paul.m27
(@paul-m27)
Honorable Member
Re: Power Supply failure


So my PSU just failed. Nothing as dramatic, but about 30 minutes into a typical ABS print with stock Slic3r settings I head a small pop and the printer was dead. I verified the fuse was blown and was hopeful that was the extent of the problem.

Unfortunately when I replaced the fuse, I powered on the printer and nothing happened. There was a *very faint burning smell so I immediately disconnected power. I have not disassembled the PSU and will not until I get shipment verification from Prusa and I cannot see what failed through the guarding but I will update when I do.

Welcome to the club. If you want to print sooner than the replacement comes and are comfortable wiring mains voltage, you can use a temp replacement. I bought this:

https://www.amazon.com/gp/product/B00KTJE3L4/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1

but I expect a cheaper supply like this would work:

https://www.amazon.com/JoyNano-Transformer-Surveillance-Industrial-Automation/dp/B01H53WIW2/ref=sr_1_6?s=electronics&ie=UTF8&qid=1517512357&sr=1-6&keywords=24v+240w+power+supply

You can just wire them to mains (snip an old three wire power cord), wire the 24v terminals to the Einsy, and then wrap the bottom of the PSU in tape so the mains voltage is not exposed. Use a power-strip with switch as your on/off, and you'll loose power-panic, but you can print.

I've designed/printed a more permanent mount (with switch, power-panic, plug) for the first psu now, so I'm permanently printing with that now. My replacement was also defective (not dead, just dropped voltage whenever the bed heated, resetting the einsy)

Posted : 01/02/2018 8:25 pm
ShamusTheTinker
(@shamusthetinker)
Eminent Member
Re: Power Supply failure

I finished building my printer last night, and when I plugged it in and turned it on nothing happened except an led in the power supply and one on the einsy by the usb port lit up. After looking online this thread seems to have the best answers but I did see something suggesting I check whether it is set to 110 or 220. Only problem with that is, I can't find the switch between the two. Does anyone know where it is on the power supply? If it's just set incorrectly (not surprising considering it's built in europe) than I'd like to set it right and see if that fixes it before I break something.

Posted : 02/02/2018 1:52 am
sean.s8
(@sean-s8)
Active Member
Re: Power Supply failure



So my PSU just failed. Nothing as dramatic, but about 30 minutes into a typical ABS print with stock Slic3r settings I head a small pop and the printer was dead. I verified the fuse was blown and was hopeful that was the extent of the problem.

Unfortunately when I replaced the fuse, I powered on the printer and nothing happened. There was a *very faint burning smell so I immediately disconnected power. I have not disassembled the PSU and will not until I get shipment verification from Prusa and I cannot see what failed through the guarding but I will update when I do.

Welcome to the club. If you want to print sooner than the replacement comes and are comfortable wiring mains voltage, you can use a temp replacement. I bought this:

https://www.amazon.com/gp/product/B00KTJE3L4/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1

but I expect a cheaper supply like this would work:

https://www.amazon.com/JoyNano-Transformer-Surveillance-Industrial-Automation/dp/B01H53WIW2/ref=sr_1_6?s=electronics&ie=UTF8&qid=1517512357&sr=1-6&keywords=24v+240w+power+supply

You can just wire them to mains (snip an old three wire power cord), wire the 24v terminals to the Einsy, and then wrap the bottom of the PSU in tape so the mains voltage is not exposed. Use a power-strip with switch as your on/off, and you'll loose power-panic, but you can print.

I've designed/printed a more permanent mount (with switch, power-panic, plug) for the first psu now, so I'm permanently printing with that now. My replacement was also defective (not dead, just dropped voltage whenever the bed heated, resetting the einsy)

Yep, I purchased the same replacement for use until I get the replacement. Not sure when Ill have the time to wire it up though as I just moved and have to dig all my stuff out of boxes.... Pretty bummed.

Luckily I have a Taz 6 I will be using in the meantime, the girlfriend isn't a huge fan of the noise though.

Posted : 02/02/2018 5:00 am
Chris
(@chris-16)
Reputable Member
Re: Power Supply failure


I finished building my printer last night, and when I plugged it in and turned it on nothing happened except an led in the power supply and one on the einsy by the usb port lit up. After looking online this thread seems to have the best answers but I did see something suggesting I check whether it is set to 110 or 220. Only problem with that is, I can't find the switch between the two. Does anyone know where it is on the power supply? If it's just set incorrectly (not surprising considering it's built in europe) than I'd like to set it right and see if that fixes it before I break something.

The psu auto switches i believe. have you talked to chat support? if you have lights on the psu and the einsy my guess would be you have the display cables installed upside down either on the back of the lcd or in the einsy

Posted : 02/02/2018 7:34 am
Chris
(@chris-16)
Reputable Member
Re: Power Supply failure


Im more worried about it in the that replacement is literally on the other side of the planet from me sense, so shipping time and therefore downtime is a large concern to me not just for this part but for the many parts that seem to have teething issues so far(fan shrouds melting when printing ABS/ PC/ Nylon, feed gears rusting, loud bearings, soft non hardened rods shipped instead of hardened rods, misaligned belts, etc).

Downtime is my main focus of concern at this time from my last 2 weeks monitoring these forums. Which is why im going to address as many of these issues as possible as soon as i get it setup and running by printing parts i may need(replacement fan shrouds, PSU brace for running a PSU not mounted on the printer, etc) So i have spare parts already on hand for any failures or issues that may occur, as after they occur may be to late to print parts. And having them on hand beats waiting for shipping from other side of planet.

Im glad there are cheap PSU alternatives available.

prusa ships 2nd day air for replacement parts, for me they were faster than i could order one delivered by amazon prime.

Posted : 02/02/2018 7:38 am
josh.w3
(@josh-w3)
Estimable Member
Re: Power Supply failure

Add mine to the list of failed power supplies (110v). I have 150+ hours of PLA printing on my MK3. Just received some PETG filament the other day and managed to print two small PETG jobs successfully. About 9 hours into my first large PETG job is when the PSU blew, apparently the sustained 240C/90C was too much for faulty component(s) to handle. Have not closely examined it yet to see if anything visibly burned, but my office definitely smelled a bit 'burny' when I got home last night. Glad that it didn't cause an actual fire.

- My MK3 Power Supply and Pwr Mgmt Upgrade
- My MK3 Camera Bed Mount Arm
Posted : 02/02/2018 4:39 pm
nathan0876
(@nathan0876)
Estimable Member
Re: Power Supply failure

prusa ships 2nd day air for replacement parts, for me they were faster than i could order one delivered by amazon prime.

good to know.

Posted : 02/02/2018 5:07 pm
Cowwolfe
(@cowwolfe)
Active Member
Re: Power Supply failure


I would be curious to know if most of the power supply failures have been on 110v or 230v ?
Maybe there is something in that, don’t know.

I’ve not yet received my printer (week 44) so kind of hoping that Prusa has a bead on the root cause of the failures,
and ships me a good one.

Jason.

My PSU is still operational (110V in USA). But I do get the clicking noises when the heat bed cycles power. I particularly notice it when the bed is heating for PET filament. The clicking noise is in sync with the room lights flashing too.

-Eric

Eric Z.

Posted : 02/02/2018 5:27 pm
Casey
(@casey-2)
Estimable Member
Re: Power Supply failure

Add me to the list with click and light flicker when heatbed cycles. It's only a 2 amp AC according to the label, and I have stuff in here that doesn't do that, at a much higher current. Something is wonky, and annoying...

My dad is saying the power supply seems under-powered. I trust his judgement, as he has worked with switch mode power supplies for many years (since I was 6 - when he was a manager for a Panasonic service center)...



I would be curious to know if most of the power supply failures have been on 110v or 230v ?
Maybe there is something in that, don’t know.

I’ve not yet received my printer (week 44) so kind of hoping that Prusa has a bead on the root cause of the failures,
and ships me a good one.

Jason.

My PSU is still operational (110V in USA). But I do get the clicking noises when the heat bed cycles power. I particularly notice it when the bed is heating for PET filament. The clicking noise is in sync with the room lights flashing too.

-Eric

Posted : 02/02/2018 10:55 pm
Dewey79
(@dewey79)
Honorable Member
Re: Power Supply failure

For those that had a power supply go bad, were any of them connected to a UPS?

Posted : 03/02/2018 1:45 am
john.n13
(@john-n13)
Estimable Member
Re: Power Supply failure

For those that had a power supply go bad, were any of them connected to a UPS?

Why might that be considered significant?

Posted : 03/02/2018 2:02 am
Dewey79
(@dewey79)
Honorable Member
Re: Power Supply failure

I was just wondering if normal house current played a role or not. Other power draws throughout the house could put a strain on a particular circuit. UPS would be able to provide clean power even though the house current dips a little.

If house current pulls in power for the printer, another device draws power out of the same source. The secondary source cuts off providing a momentary spike to normalize.
The flickering lights reminds me when a vacuum cleaner is switched on in a circuit that is already max'ed out. Just trying to see if there are any outside issues that could play a part.

My last house only had 110 amps and I would run two six foot cabinets at home with a network training lab. Just trying to think of things that could cause this. Not saying the PS isn't the problem.
And no I didn't consider it significant.

Posted : 03/02/2018 2:25 am
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