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Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 5:00 am
by SystemsGuy
That's nice work on the threading - you do that by hand? If so, damned nice work. If not, damned nice work - what did you use!? :-)

Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 5:21 am
by JeremyBP
I single-point cut the threads on my lathe. I just sharpened a 60ยบ bit and hoped for the best. I think it came out well.

For the relief behind the threads I just ground a narrow parting tool out of a high-speed steel blank and plunged. With oil, the chips roll right off and thepart comes out shiny.

Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 3:13 pm
by orcinus
JeremyBP wrote:EDIT: Yes, also coolness factor. The coolness factor is not to be underestimated. :D


Just please don't start doing rainbow anodized Ti hotends :lol:

Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 3:22 pm
by JeremyBP
orcinus wrote:Just please don't start doing rainbow anodized Ti hotends :lol:


Aww man...... But it reminds me so much of those cheap knives I saw in chinatown....

I was actually considering doing a dark red anodize on the hearer blocks and then laser etching patterns into it, but I think I'll stay simple (and un-anodized) for now.

Heat Pipe?

PostPosted: Sun Mar 03, 2013 3:27 pm
by bdring
OT: Has anyone ever used a heat pipe to cool a hot end?

Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 3:33 pm
by JeremyBP
That's interesting. I don't think I've ever seen one used. RepRap did a water-cooled one (http://blog.reprap.org/2012/07/water-co ... t-end.html).

I wonder how efficient it would be, over just having a large heat-sinking block at the top. I guess it accomplished the same thing as the water cooling (bringing the cooling off the extruder), but more rigidly (I'm not sure a very flexible heat pipe would work so well). Could be an interesting experiment.

Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 3:59 pm
by bdring
You basically model a heat pipe as if it has hundreds of times the thermal conductivity of aluminum. You then need to get the heat out of them, but it can be done at a more convenient place, over a larger area. They work especially well when they are vertical with the hot end down. Gravity helps return the fluid.

You can bend them over a form. Some have sintered wick material that can be damaged by bending. If you made a little coil at the bottom and damaged the wick it might not matter much.

The little ones are not that expensive. We use a few at work and the rep is always giving them away as tchotchkes.

Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 4:03 pm
by JeremyBP
That sounds really tempting. Are the ones you get flexible enough to mount on an extruder? The only ones I've used were large and rigid.

Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 6:23 pm
by SystemsGuy
Bart - we had - I *think* - a Comtech modem that and a heatpipe that was threaded and round at the "collection" end - it was probably bigger than an M6 - but that would be a pretty interesting thing to play with....

If you could find one already threaded at M6, and it was roughly the right height, could be something easy to try. I'm pretty sure I have a couple "standard" flat style laying around..

Re: My Latest Project -- Introducing The TiEnd

PostPosted: Sun Mar 03, 2013 6:37 pm
by bdring
I have a few that are about 1/8" diameter and about 6" long. I think the tip could be wrapped around a form. Maybe a copper disk with an internal thread and a groove around the outside.