Jun 3, 2010

Plastruder Fail — again!

Posted by at 2:46 AM
Plastruder Fail w/MK5 Drive Gear

I just rebuild my plastruder and installed the new MK5 Drive Gear, and it failed catastrophically!

Ok, well, I didn't blow a retainer or anything, but I think that's a testament to the Drop-in Paxtruder that I'm using.

But man, can that thing push! It twisted the filament up in the tiny space available. Here's a few more photos to show the damage (click on any photo to see it bigger):

Plastruder Fail w/MK5 Drive Gear 2

Plastruder Fail w/MK5 Drive Gear 3

And here's what the filament looks like when I pulled it out:

Filament detail after fail 1
Filament detail after fail 2

You can see that there's something binding it up, but I think the real problem is heat. I cleaned this out and plugged it back in, and my temperature reads 109ºC at room temperature, so I think my thermistor failed.

If that happened mid-build then that would explain this. The temperature got too low and the plastic was no longer liquid enough to extrude.

Wow.

Now to rebuild, again! Gah!
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2 comments:

  1. If you can switch to 1/8" thick delrin for the entire layer where the plastic is, then you won't get that much buckling. then again, maybe it saved you from breakage of the retainer.
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  2. Wow, I had no idea that the MK5 was so powerful. Granted, I haven't had a single problem with the MK4 yet, but it's good to know there are options out there.
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