Failure - With solution - Something to watch for
 
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Failure - With solution - Something to watch for  

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AJS
 AJS
(@ajs)
Noble Member
Failure - With solution - Something to watch for

After the fact things are obvious, but at the time, I was puzzled.

I thought I would share for those of us climbing the learning curve as something to watch for.

First, I have things dialed in to my liking. Bed adhesion, flow, surface finish, etc. I was feeling bulletproof. Lots of small/med projects (in the center of the bed) very successful, with no issues. I was over-confident.

So I needed some specialized L brackets for a project (my enclosure actually). I need 36 of them, so I decided to print them 20 at a time, completely filling the bed with the L Brackets.

Failure. But in a strange (to me) way. The prints adhered perfectly, but part way up the vertical part of the L bracket the entire thing shifted by half the period of the L brackets. The result was the tops were connected between two bottoms, rather than individuals. Print completed fine, but parts were not usable.

After some consternation, I determined the cable from the extruder had been slowly dipping down over time. With a single print in the center of the bed, that had no harmful effects. But with a periodic array of things, it caught on the parts in back and caused the X-axis to skip. A bit of work getting that cable "up" and now I have 40 of those L-Brackets with no issues.

So, obvious fact, check that extruder cable is floating above the nozzle hight. Mine was just barely, and a long print, with some vibration, and it caught just once. Once was plenty to destroy the print.

Lost a lot of filament for that lesson, and wanted to save you the same.

Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage or loss. If you solve your problem, please post the solution…

Respondido : 16/04/2017 4:54 pm
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