Welcome to the SeeMeCNC Community

[img]http://farm9.staticflickr.com/8542/8673125930_9d2d209ba7_n.jpg[/img]
Untitled by foshon, on Flickr

It was about a fifth of the way through and knocked over one portion of the print. I made blue pasta. This is the piece it knocked over. What is up with the weirdness in the center??? The print was in three seperate peices up until this point. The other two looked normal.


[img]http://farm9.staticflickr.com/8396/8672031027_eb31f4f6a5_n.jpg[/img]
Untitled by foshon, on Flickr

[img]http://farm9.staticflickr.com/8385/8673129028_a81fcb612b_n.jpg[/img]
Untitled by foshon, on Flickr

You can see it had finished the perimeter and strted on the infill when this happened. Any ideas?

It looks as though your nozzle kit the piece and melted that center.
No ideas on why though. It sure looks melted to me.

Carl

I have had this happen. Seems like the material is hot and soft so when the hotend is building the layers it keeps going over the same spot and keeping the area hot. As it moves up the layers start to cool causing a high spot that will no longer be pushed out of the way as the hotend moves. Now the hotend gets stuck on the high spot and melts, knocking over your part. Or gets stuck to the part and takes a ride with the hotend until it falls off.
Always happens right after you walk out of the room.
What speed where you printing at?
And is your hotend parallel to the bed?
I slowed the speed down for small parts and triple checked the hotend and no more problems.

It was bizzare. I was sitting about 20 feet away from printer, it never made any odd noises. the other two uprights are nearly perfect. Since that event I have been having issues with stripping filament. I am going to try to hammer down my retraction settings today.

I believe I had the same issue on a large part, only I wasn't sitting there. Slicer estimated the print time at 37 hours and the "crash" happened at night while I was asleep. Mine didn't melt a spot in the middle like that, but it did hit hard enough to knock all the binder clips off my glass plate and shift it over about a quarter of an inch. When I came out to check on it, the last section of the print was offset. I never figured out what made the nozzle crash.

I wonder if the piece broke free from the heated bed but stuck to the nozzle for a little bit before falling off and making spaghetti. That would explain the burn in the piece.

Never had this happen, I'm just guessing.

harley573 wrote:I believe I had the same issue on a large part, only I wasn't sitting there. Slicer estimated the print time at 37 hours and the "crash" happened at night while I was asleep. Mine didn't melt a spot in the middle like that, but it did hit hard enough to knock all the binder clips off my glass plate and shift it over about a quarter of an inch. When I came out to check on it, the last section of the print was offset. I never figured out what made the nozzle crash.

HOLY SHNIKIES!!! 37 hour print??? What was it?

Jimustanguitar wrote:I wonder if the piece broke free from the heated bed but stuck to the nozzle for a little bit before falling off and making spaghetti. That would explain the burn in the piece.

Never had this happen, I'm just guessing.

Sounds plausable, I dunno. I printed the same thing today without issue.

foshon wrote:

Jimustanguitar wrote:I wonder if the piece broke free from the heated bed but stuck to the nozzle for a little bit before falling off and making spaghetti. That would explain the burn in the piece.

Never had this happen, I'm just guessing.

Sounds plausable, I dunno. I printed the same thing today without issue.

As a friend of mine says doing the same thing over and over and expecting different results is the definition of insanity except in 3D printing.

Polygonhell wrote:

foshon wrote:

Jimustanguitar wrote:I wonder if the piece broke free from the heated bed but stuck to the nozzle for a little bit before falling off and making spaghetti. That would explain the burn in the piece.

Never had this happen, I'm just guessing.

Sounds plausable, I dunno. I printed the same thing today without issue.

As a friend of mine says doing the same thing over and over and expecting different results is the definition of insanity except in 3D printing.

Sounds about right!

As a friend of mine says doing the same thing over and over and expecting different results is the definition of insanity except in 3D printing.

Oh I'm soo stealing this ha ha, sooo freeking true!

Foshon - I've seen similar things happen, usually seems to happen when the piece warps off the bed, and sticks to the print head as it moves around making a nasty mess as it goes.

cassetti wrote:

As a friend of mine says doing the same thing over and over and expecting different results is the definition of insanity except in 3D printing.

Oh I'm soo stealing this ha ha, sooo freeking true!

Foshon - I've seen similar things happen, usually seems to happen when the piece warps off the bed, and sticks to the print head as it moves around making a nasty mess as it goes.

I'm leaning that way myself, I just don't know why. It was abs on glass/abs juice. I think I'm going to chalk it up to new printer.

Bit of an aside here, foshon. You don't use kapton tape for ABS? I only ask because I'd be very happy not to have to deal with it.

dsnettleton wrote:Bit of an aside here, foshon. You don't use kapton tape for ABS? I only ask because I'd be very happy not to have to deal with it.

Nope no kapton. I run my bed around 80 degrees and use ABS juice where I'm printing.