e3d nozzle jam. My fault?

This is my first time printing on a newly built printer, so I'm wondering what I did wrong. .40mm e3dv6 nozzle heated to 250degC, starting extruding 3mm ABS at 15mm/s. Within 30 seconds the filament stopped feeding, and when I retracted it the nozzle was jammed.

Disassembled, confirmed the heat break was free and clear, with the plastic stuck solid in the nozzle. What could I have done to cause this "hollow" jam?

Attachment 7875

I'm currently switching over to the magma hotend while this soaks in acetone.

You can read this article to solve your problem about nozzle jam. Let me know if this works for you.

Still working on getting a sewing needle through it, been soaking for 48 hours. . Thank you for the link

When I get a huge jam I use a torch and burn the jam out.

Heat gun works just as well without the flame.

Quote:

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starting extruding 3mm ABS at 15mm/s

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This is not clear to me. Do you mean 15mm/s of the 3mm filament, or 15mm/s of the extruded plastic (900 mm/min? at which width and layer height?)

If the former, you are trying to extrude (1.5^2)*PI*15=106 mm3/s which is way too much for any hotend I know of.