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Print failures. Why (with images)?

Aug 12, 2018 2:04 pm

I'm using a brand new i3 mk3 to print one of my first objects. Material is the original roll shipped with the prusa i3 kit.
While the prusa test print and another object printed succesfully at first try, i have issues printing the next object.

Images of the failed prints can be found on my google album: https://photos.app.goo.gl/63P9gS3xx7uXCVvF7

There are 5 photos:
1) The one where the object is placed on a wood surface is the first failed tentative
2) All the other one are from second tentative
3) there is a photo showing a piece of abs coming out of the extruder while heating before print. This piece sometimes get stuck somewhere on the plate or at the sides of the extruder, messing up some prints because it attach at random somewhere on the printing object.
Extruder motor don't seems to rotate while this pla piece is coming out.

I actually managed to start an apparentrly positive print of the same object by adjusting the z axis distance from the plate, but is still running and i'm not sure yes if is going to finish without issues.

Note that:
1) The printer was a kit. I built it.
2) i always clean the print plate with isopropyl alcohol pads (i found on amazon the same pads shipped with the printer)

There are some suggestions for there problems?
Thanks in advance!

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Posts: 1299
Joined: Dec 31, 2017 2:28 am
Answers: 30
Location: New England/NE US
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Re: Print failures. Why (with images)?

Aug 12, 2018 4:41 pm

It's a bit hard to say for sure in those pics because you're showing multiple layers. Until you get the 1st layer to lay down properly, there's no point trying more ambitious prints. I suggest the "life z" method to get things sorted out initially. You want a nice, even 1st layer with minimal distortion across the print.

Just a note: The 2 alcohol wipes that came with the printer are fine for a 1st couple of tests, but you really want 91%+ isopropyl alcohol (IPA) for use with PLA. The wipes are typically 70%, and may contain impurities that interfere with bed adhesion. A good clean with dish soap and water is a good place to start. Above all else, avoid touching the bed. I can get 3-4 or more prints with a good IPA clean.
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