Adventures in Printing 2 - "Whoa, that doesnt look like ABS"

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cweiss
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Adventures in Printing 2 - "Whoa, that doesnt look like ABS"

Post by cweiss »

After my 2nd print, I saw something on the heated bed I didn't expect - a blob of metal...

[img]https://lh4.googleusercontent.com/-VW3K ... 091747.jpg[/img]

WTF? I'm not *that* sloppy with my soldering iron, where the heck did that come from? Is there metal in my ABS?

Then, I took a closer look at my hot end (stop snickering) - holy cow!
[img]https://lh6.googleusercontent.com/-uyB4 ... 091804.jpg[/img]

My first though was that I was actually melting the hot end itself. After closer inspection, it looks like the resistor leads were getting so hot, it was melting the solder I'd used in the wiring crimp, which had then run down and dripped onto the print. Also, pretty sure I should have mounted the shroud so it wasn't pinching the resistor wiring.
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by geneb »

And THAT ladies and gentlemen, is why you NEVER, EVER solder the heating resistor wires.

g.
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by Polygonhell »

It looks like one of the resistor leads is shorted against the hotend heater block, that's never going to end well.

I soldered my first hotend wires, the solder doesn't usually melt per-se, it sort of evaporates, then at some inconvenient time mid print, the connection comes loose and your hotend cools down.
cweiss
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by cweiss »

Good catch, Polygonhell - I did go back and re-bend the wires to not touch, as well as scraped away the few bits of solder left that had flowed over the RTV. The fan shroud also acts as an insulator, so I'm less worried about shorting out.
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by McSlappy »

And that's why I never got to use the stock heating resistors... I shorted mine, blew them up and ended up switching to a 40w heater cartridge. :)
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Eaglezsoar
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by Eaglezsoar »

That's why the assembly manuals tell you NOT to solder the resistor connections. Now it makes sense.
Everyone does read the manual, right?
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Captain Starfish
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by Captain Starfish »

There's a manual?
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by McSlappy »

Manuel, he works at SeeMeCNC?
I loved my Rostock so much I now sell them in Oz :)
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by Captain Starfish »

Que?
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by JohnStack »

Speaking of not soldering, where do you find those crimps that SeeMeCNC puts on their assembled hot ends?
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by guanu »

JohnStack wrote:Speaking of not soldering, where do you find those crimps that SeeMeCNC puts on their assembled hot ends?
really any crimps will work, these are a quick search result... we use 16-14 non insulated butt connectors...

http://www.grainger.com/product/POWER-F ... &pbi=4X290" onclick="window.open(this.href);return false;

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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by Eaglezsoar »

JohnStack wrote:Speaking of not soldering, where do you find those crimps that SeeMeCNC puts on their assembled hot ends?
http://www.mcmaster.com/#crimp-on-wire- ... rs/=s8g5il" onclick="window.open(this.href);return false;
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by guanu »

yes eagle, http://www.mcmaster.com/#7227K33" onclick="window.open(this.href);return false; would also be correct

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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by Eaglezsoar »

guanu wrote:yes eagle, http://www.mcmaster.com/#7227K33" onclick="window.open(this.href);return false; would also be correct

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Thank you sir, just trying to give alternative companies to get the parts from.
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by notarat »

Eaglezsoar wrote:That's why the assembly manuals tell you NOT to solder the resistor connections. Now it makes sense.
Everyone does read the manual, right?
I only ever read the manual if I can't figure out the pretty pictures.

So...I anticipate making a repost of this thread at some point in the distant future if I can ever get motivated enough to open the cardboard box my Rosktock is currently in and putting the darned thing together, lol
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by nitewatchman »

Manuals are only manufacturers reccomendations or at least that is how our customers see them.

You always know what's coming when the discussion starts with, "We figured out a new way to install that."

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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by cweiss »

That's the problem with me and printed stuff, I always check out the pictures and never get to the articles.
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Re: Adventures in Printing 2 - "Whoa, that doesnt look like

Post by PopolZ »

cweiss wrote:That's the problem with me and printed stuff, I always check out the pictures and never get to the articles.

I thought it was the only way to follow a manual :oops:
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