1 Topic by Mic (edited by Mic 2013-05-18 23:25:49)

  • Mic
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Topic: I melted My Hot End

It got clogged because a few to many times letting ABS cook in it. So I took it apart and put it back together. Well the kapton tape holding the little sensor crapped out. Brown goo rolling out of the black piece. Well, I knew that was no good so I stripped it back down and decided I was going to have to replace that white piece. I thought about epoxy but then I saw some old machine screws I have in a can. The screw is almost the perfect size so I cut a piece long enough to go all the way down to the brass and drilled a hole thru it. Cleaned up the ends and tapered the top end.
I slid it 3/4 of the way in and then put some black RTV on the last few threads and pushed it in then let it sit over night.

Only trouble I have had with it is my hole is a bit to big, didn't have the right size bit.

I thought heat might be an issue but it hasn't so far.

I can say one thing interesting that has come out of this, I"m putting on the MK4 Jigsaw extruder with the quick release. About to start that in just a minute.

2 Reply by 2n2r5

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Re: I melted My Hot End

lol... that is what inspired me to switch to the MK4 myself. What is with those encapsulated M3 cap screws that hold the wood on. Tell me that isn't a PIA!.

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website

3 Reply by Mic

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Re: I melted My Hot End

I stripped one and have a piece of bare copper wire twisted around the bolt under the nut which after this time coming off probably won't go back on.

Just not meant to be worked in and out so many times.

Honestly I am thinking about moving the extruder to the frame and using a custom hot end. I have a couple of heat sinks I can melt down to pour a body from.

I like the brass part of it though.

4 Reply by 2n2r5

  • 2n2r5
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Re: I melted My Hot End

Mic wrote:

Honestly I am thinking about moving the extruder to the frame and using a custom hot end. I have a couple of heat sinks I can melt down to pour a body from.


That's what I am going to do too. But I am going to use commercially available hot ends.

http://www.soliforum.com/topic/2428/yet … den-style/

adrian already has a pretty good design printed out.

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website

5 Reply by Mic

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Re: I melted My Hot End

Sorry for the long departure. I haven't had much time lately with work and gardening to.
I'm waiting on a resistor still. I can use the machine but it fluctuates the temp to drastically. So I picked one up just waiting for it to ship.
What little I have done Im not sure the Black RTV is the best thing to glue the bolt piece into the hot end. Its supposed to be for high temp but gets a bit soft. Maybe thats why it works in engines, swells and plugs the gap?