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Power Problem, PSU issue?  

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MTom
 MTom
(@mtom)
Trusted Member
Power Problem, PSU issue?

Hi,

recently I have randon print fails due to power issues, the PSU suddenly starts to stutter likehaving a loose contact, the print stops, the printer goes off and back on. I had the feeling that wiggling at the power cable had an effect but I am not so sure. Pretty hard to reproduce this.

I dismounted the PSU from the frame now, to see if the vibration while the print could cause this.

This already is the second PSU (black) the first silver one died pretty soon after I got the printer.

Someone with a similar problem?

Posted : 28/11/2020 10:36 am
cwbullet
(@cwbullet)
Illustrious Member
RE: Power Problem, PSU issue?

Check you fork connectors and terminal screws to make sure they are tight and the power panic is tightly connected.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 28/11/2020 11:04 am
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Power Problem, PSU issue?
Posted by: @mtom

Hi,

recently I have randon print fails due to power issues, the PSU suddenly starts to stutter likehaving a loose contact, the print stops, the printer goes off and back on. I had the feeling that wiggling at the power cable had an effect but I am not so sure. Pretty hard to reproduce this.

I dismounted the PSU from the frame now, to see if the vibration while the print could cause this.

This already is the second PSU (black) the first silver one died pretty soon after I got the printer.

Someone with a similar problem?

I would also check all power lines on the PSU and the Einsy for corrosion and loose contacts and check the output voltage of the PSU.

Nominal voltage = 24V.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 28/11/2020 11:37 am
MTom
 MTom
(@mtom)
Trusted Member
Topic starter answered:
RE: Power Problem, PSU issue?

Yes thanks, I did already check these, except for the voltage test. I did a 6h print yesterday and it stopped at about 4 1/2 so it is pretty difficult to reproduce the problem. Currently printing again with dismounted PSU. Shouldn´t the printer allow me to resume the print? There is no power fail in the stats log once the printer restarted.

Posted : 28/11/2020 11:45 am
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Power Problem, PSU issue?

@mtom

Does the printer perform a reset or does it lose power and restart completely?
Electrostatic discharges can often reset the printer, which means that printing cannot continue.

Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 28/11/2020 12:22 pm
MTom
 MTom
(@mtom)
Trusted Member
Topic starter answered:
RE: Power Problem, PSU issue?

I´d say it loses power and restarts. Hard to say as it isn´t happening on demand. :-/

Posted : 28/11/2020 1:22 pm
karl-herbert
(@karl-herbert)
Illustrious Member
RE: Power Problem, PSU issue?

@mtom

The only thing I can think of because of the little information is:
- Check voltage during operation
- Check fuses and contacts

If you do not find anything there, I would turn to the Prusachat.

Maybe you will find a hint here:

https://help.prusa3d.com/en/article/power-panic_2092

https://help.prusa3d.com/en/article/testing-safety-features-mk3-mk3s_2079

 
Statt zu klagen, dass wir nicht alles haben, was wir wollen, sollten wir lieber dankbar sein, dass wir nicht alles bekommen, was wir verdienen....
Posted : 28/11/2020 2:20 pm
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