I purchased a Mini back when they launched in January 2015 and have been very pleased with the results. While doing my last few prints I started to hear an inconsistent ‘ticking’ noise that I couldn’t isolate. I took a break from printing for a month or two and when I went back the ticking was omnipresent. Here is a video of the behavior:
Searching the forums I found recommendations for cleaning the hobbed bolt in the extruder and for adjusting the springs on the latch jib using the spacing template as described here:
I also tried to using the unclogging tips posted here:
And the behavior improved on my first print. Stepping away for a day and printing again brought the behavior back somewhat which I was able to adjust out.
My question is, is the ticking sound the result of the tension being too loose or too tight, and is the sudden volatility of this setting an indicator of something more ominus? I ask only because since receiving the machine I never really had to deal with making the adjustment.
While investigating the behavior, I did notice one part of the extruder seemed to be delaminating:
Not knowing if this was contributing to a the problem, I set out to print a replacement of this STL:
When I looked at the part in the latest Lulzbot Cura, it appeared to have some built-in support to allow the print to complete as shown in the two Normal image previews. However when the part printed those elements were missing. When I went back to Cura and looked at the Layers view, the built-in supports disappeared (photos in the album below). Knowing that Lulzbot uses Slic3r to print parts in-house, I then tried slicing the part and printing it in Slic3r which appeared to work onscreen, but the actual print had issues with the support structure not maintaining its structure (also photos in album below) and I stopped it early on.
So my questions are these…is the delaminating part of the extruder body contributing to the ticking noise while printing? Is the fact that the part wouldn’t print as previewed in Cura a bug in Cura or my settings (or both)? Was the failure to print the part with Slic3r just my own configuration issues or something else? (I used the Lulzbot Slic3r guides as listed here -> https://www.lulzbot.com/content/mini-slic3r-profiles)
Sorry for the very long post, and thanks in advance for any insights given…