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Printer failing on jobs > ~1.5 hours  

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Alyssa
(@alyssa)
Eminent Member
Printer failing on jobs > ~1.5 hours

Hi all,

I'm very new to 3d printing and this is my first printer, so bear with me as I'm very not experienced with its functionality. I've printed a total of about 5 shapes, 2 of which are within 1.5 x 1.5 x 1 inches (area smaller than a square on the metal bed) and 3 of which are above that (from 1.7 x 1.7 x 0.5 up to around 2 x 2 x 0.75). In the two that were relatively small, there were no issues from start to finish, except for some minor stringing. However, when I scaled up the prints, these started failing prematurely (almost 3 hours in for the big print and 1.5 hours in for the small print). I have footage of what happened to the smaller print as I'd been trying to investigate this for a while, although the effect on this print was a lot more violent (extruder just divebombed straight for the print and destroyed the partial result). Is this a simple calibration issue or is there something more complicated to fix? Thanks in advance y'all!

Link to footage here

EDIT: There was also a minor thing that I noticed but assumed was natural for accuracy, as I heard some relatively quiet scraping every time the nozzle moved (which was a lot). I assumed this was because the extruder was directly touching the print, and I thought this was to increase accuracy so that the melting ink didn't go any particular direction. Not sure whether this is related, but something I thought I'd mention. Thanks again!

Posted : 29/05/2021 6:43 am
cwbullet
(@cwbullet)
Member
RE: Printer failing on jobs > ~1.5 hours

Can you upload the 3MF file from this print?  You will have to zip it.  

Have you had any successful prints that you have sliced?

--------------------
Chuck H
3D Printer Review Blog

Posted : 29/05/2021 1:18 pm
ksweir
(@ksweir)
Active Member
RE: Printer failing on jobs > ~1.5 hours

The spring steel sheet is installed incorrectly on the heatbed and is moving around.  Spin it 180 degrees.  The tab on the steel sheet fits between the two threaded studs on the side with the power connection.

 

Posted : 29/05/2021 7:51 pm
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

Yes, so like I said the 2 first slices that I printed that were within a square worked perfectly and came out really well, actually (these are just the a.3mf file but scaled down to 50% rather than 75%). These are the only ones that were problematic.

heart 3mf file

Here's another one that also failed but not as destructively:

a.3mf

Thanks for the help!

Posted : 29/05/2021 7:58 pm
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

@ksweir

I actually literally just figured this out earlier today lmao but thanks, I figured it was a bit precarious. This isn't the problem though right, since it's still a flat surface?

Posted : 29/05/2021 11:25 pm
Diem
 Diem
(@diem)
Illustrious Member
RE: Printer failing on jobs > ~1.5 hours

@alyssa

Before anything else do what @ksweir suggests.   Your print bed is out of place and moving.

I suspect there may be another minor problem here too but make a new print after the easy fix and let's see how you get on.

Cheerio,

Posted : 30/05/2021 8:36 am
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

@diem

working on it as I type this, same print that failed at 67% and it's actually at 63%, fingers crossed...

Posted : 30/05/2021 8:52 am
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

Very unfortunate news, it ended up failing even later at 87%, only 18 minutes left on the print. There's literally no reason why this happens and it's not like the extruder is clogging, since I was able to remove the filament right after very easily.

Posted : 30/05/2021 9:50 am
Diem
 Diem
(@diem)
Illustrious Member
RE: Printer failing on jobs > ~1.5 hours

@alyssa

So some improvement...

Please post a picture of the new failure, top and bottom.

Cheerio,

Posted : 30/05/2021 12:35 pm
ksweir
(@ksweir)
Active Member
RE: Printer failing on jobs > ~1.5 hours

After looking at the video again there may be an issue with the sliced file on the usb device, or the usb device itself.  I loaded heart.3mf into Prusa's g-code viewer.  The tool travel at the time of the failure in your video does no match any travel lines in the g-code viewer.  Also, in the video the print is at 67 % with 47 minutes remaining, then jumps to 22% with what looks like 34 minutes remaining at the time the print head begins to move erratically.

Did the failure with 18 minutes to go happen in a manner similar to the video?

Posted : 30/05/2021 12:56 pm
cwbullet
(@cwbullet)
Member
RE: Printer failing on jobs > ~1.5 hours

@ksweir

You might be right.  I do not see an issue with the file or GCODE that it makes.  I am away from my printers for a long weekend.  I will try and print it Tuesday night if it continues to fail.  

--------------------
Chuck H
3D Printer Review Blog

Posted : 30/05/2021 1:37 pm
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

hi y'all, sorry for the long delay, was dead tired after the print. this is the result, and yes it just went back to a weird percent then started moving erratically. I only have the top of the failure. Thanks for the help!

Posted : 30/05/2021 8:36 pm
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

@ksweir

I do agree with this, there's literally no reason it would make the erratic movements (not only this, but it also went from a z-value of around 10 to a z-value of around 14). My theory was that there was a clogging issue and this resulted in the firmware simply ignoring the gcode and instead going under error handling procedures, but any higher of calibration to prevent clogging resulted in filament not sticking. And also this behavior just seems completely out of place. I'm not finding any similar issues online either...?

Posted : 31/05/2021 1:44 am
Diem
 Diem
(@diem)
Illustrious Member
RE: Printer failing on jobs > ~1.5 hours

To narrow things down a little - try printing from a different USB drive.

Cheerio,

Posted : 31/05/2021 8:46 am
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

I just tried on my Cruzer Glide that I formatted as FAT32, but the printer isn't detecting any files... methinks the USB reader might be bugged but *shrug*. I'm using the original USB and it doesn't seem to have had problems other than this, so hopefully it just magically works after replugging it back in?

Posted : 31/05/2021 10:01 pm
Diem
 Diem
(@diem)
Illustrious Member
RE: Printer failing on jobs > ~1.5 hours

Next try cleaning the contacts.  You will need a slimmed down cotton bud and some acetone to get into the usb socket and make certain there is no grease in there.  While you are there use a magnifying glass to check the solder joints are ok and no tracks are broken.

Can you print any of the Prusa supplied files?

If the Prusa files print OK then we need to look at your source files and your copy of the slicer.

If the Prusa  files also jump sections then its time to contact support:

Log into your Eshop account, navigate to support and live chat is at bottom right in most browsers. If not you may need to disable your ad-blocker temporarily.

Cheerio,

Posted : 31/05/2021 10:50 pm
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

Update, so I just figured out what I had to do to get my new flashdrive formatted and this was a combination of 1) must be FAT32, 2) must be MBR, and 3) must have only one volume total in it. Once I plugged this in and started the print again, though, it's all perfect! Thanks for the help y'all!!

Posted : 01/06/2021 4:09 am
Alyssa
(@alyssa)
Eminent Member
Topic starter answered:
RE: Printer failing on jobs > ~1.5 hours

@diem

Thank you for the help although fortunately I didn't have to go digging around (I'm very bad with electronics, haha)

Posted : 01/06/2021 4:09 am
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