What happened to cause this?

I have an Ender 5S1. I started printing with pteg from this 3D printing Canada.

I got 3 prints out 2.5 hours each.

Running the print again filament stopped coming out on 1st layer.

I could not pull the filament out even when nozzle was heated to 260.

I was printing at 80mm/s 235

Taking the hotend apart thinking it was a clog I found absolutely no leaking or backup filament.

Then this part is what has the issue.

Trying to pull the filament out of this it broke off inside.
The end with filament still is one that goes to the heartbreak.

The plastic tube in the heartbreak is not deformed whatso ever.

So how did this happen with a freshly opened filament? After using 8 hours of printing?

Also how do I get the hole cleared?

Here’s additional pic of hotend.

Is this caused because of using petg? I’ve never ran the printer hotter than 230 before, and I’m using a 0.6 nozzle for the last dozen or so hours.

Thanks in advance

It is possible that there was just something that clogged up the hole, if you are using a hardened steel nozzle I would tend to print a little bit higher temperature, maybe 245-250.

I don’t think temperature had anything to do with it, I guess I forgot to add this picture with it assembled right? In the middle of that black piece where I circled is where it was wedged in tight. So the filament on both sides of the black thing after taking it apart had not even experienced any heat deformation.

I saw someone make a post about this type of issue when using two ends of filament that you fuse together manually so that it runs as a single continuous strand, where you fuse it together? We’ll have a bulge that won’t go through the pinhole type of issue.

I’m not sure if rules are filling up at points in their length that you purchase can have these or not.

Oh and I did heat it up to 270 during the time, but I was attempting to purge the nozzle of backup. So at that
temp and no heat deformation for most of the length of filament that hadn’t reached the nozzle. It’s got to be some kind of problem with the spool right?

Its not out of the realm of possibility that there could have been a large spot in the filament, its also possible that if there was still moisture in the PETG it could have boiled off and expanded the filament.

I wouldn’t take temperature out of the picture entirely though, its possible that the lower temperature could have been a catalyst for everything to go wrong.