Trouble all of a sudden

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mhackney
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Re: Trouble all of a sudden

Post by mhackney » Sun Mar 15, 2015 7:53 pm

Yes, always set the suck to prime the same unless you have good reason not too (I can't think of any).

No, don't make a thicker first layer. Keep that the same and let's figure out what the real problem is!
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Muggs
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Re: Trouble all of a sudden

Post by Muggs » Mon Mar 16, 2015 12:02 pm

OK, tried another today with the 1.5 Prime/Suck, but same result. :evil:

So, I started thinking; what could this possibly be?
I took the entire extruder apart, and found problem #1; the hobbed bolt groves were completely clogged with filament. When I first got the TAZ I started to print with an extruder temp of 185, which I was told was too low, but I had already cut into the filament many times, so that must have filled the groves in the hobbed bolt.
I cleaned those out with an X-acto knife and put it all back together again.

Because I removed the extruder I needed to recheck the bed level, that's when I found problem #2; the bed is bowed up (like a turtle shell) in the middle. Not really sure what I can do about this except home to the middle of the plate and let the edges fall off slightly.

Any other thoughts?

Thanks.

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mhackney
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Re: Trouble all of a sudden

Post by mhackney » Mon Mar 16, 2015 12:07 pm

Ok, that's progress!

On the bed - can you remove it from the printer and use a good straightedge check to see if it is flat? It might be that putting it in the corner clamps is pushing the corners in and bowing the center. How much bow is in it?
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Muggs
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Re: Trouble all of a sudden

Post by Muggs » Mon Mar 16, 2015 12:22 pm

Absolutely PERFECT first layer. See previous post.

Very happy again.

Thank you Mike and Baltimorebully.
Mike, this is with 1.5 Prime/Suck settings, any reason to change that? . Stupid question I know based on what I'm looking at right now.
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Muggs
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Re: Trouble all of a sudden

Post by Muggs » Mon Mar 16, 2015 12:24 pm

Mike, I posted before I saw your reply.

I would guess about 0.005 - 0.007" (that's in inches. LOL)

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mhackney
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Re: Trouble all of a sudden

Post by mhackney » Mon Mar 16, 2015 12:44 pm

No need to change the suck/prime (as you know!)

So that's quite a bit of variation > .1mm. Is that with the plate removed form the machine, or clamped in?
Sublime Layers - my blog on Musings and Experiments in 3D Printing Technology and Art

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Muggs
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Re: Trouble all of a sudden

Post by Muggs » Mon Mar 16, 2015 12:48 pm

I have a part building right now, so that was a guess. When this part is finished I'll put a dial indicator on it and let you know.

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mhackney
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Re: Trouble all of a sudden

Post by mhackney » Mon Mar 16, 2015 12:49 pm

I'd like you to check flatness with the bed removed so we can eliminate compression warpage from the mounting mechanism.
Sublime Layers - my blog on Musings and Experiments in 3D Printing Technology and Art

Start here:
A Strategy for Obtaining Great Prints

Strategies for Resolving Print Artifacts

The Eclectic Angler

Muggs
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Re: Trouble all of a sudden

Post by Muggs » Mon Mar 16, 2015 1:24 pm

Mike,

OK will do.

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Re: Trouble all of a sudden

Post by BaltimoreBully » Mon Mar 16, 2015 2:50 pm

Glad you are starting to get things sorted out. That really is a very nice first layer on those pics that you posted.

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