Hot End Options?

Re: Hot End Options?

Sublime — Tue, 10 May 2011 23:17:44 -0400

HereinCS Wrote:
-------------------------------------------------------
> Thanks for putting up the instructions. I'm
> wondering what the advantage is for making the
> nozzle out of an acorn nut or gas jet nozzle vs
> simply boring out the threaded rod?

The reasons to have a removable nozzle are to make it easier to clean/re-drill as well as having different nozzles .35 .4 .5 etc and from my experiences stopping the bit .5 - 1 mm from the end of the hole is very hard with out a lathe. You don't want the .5mm hole any longer than 1mm or the force to extrude gets higher.

There are some disadvantages too, the two piece design can leak where a one piece can't. I found in my previous designs if the nut didn't fit flat enough against the heater block I had to wrap the top of the threads with 4-5 wraps of teflon plumbers tape to seal it.

Re: Hot End Options?

HereinCS — Tue, 10 May 2011 23:00:45 -0400

Thanks for putting up the instructions. I'm wondering what the advantage is for making the nozzle out of an acorn nut or gas jet nozzle vs simply boring out the threaded rod?

Re: Hot End Options?

Sublime — Tue, 10 May 2011 17:55:13 -0400

Removed, i recommend buying a J-head or Makergear hotend now.

Re: Hot End Options?

jcabrer — Fri, 06 May 2011 18:52:06 -0400

My Wildseyed Simple Hot End requires only simple tools, and the mechanical components can be sourced from the hardware store. It fits the Wade's Extruder nicely, and you have a lot of control over how small to make the nozzle hole.

Pictures are at Thingiverse

Re: Hot End Options?

SebastienBailard — Fri, 06 May 2011 02:33:27 -0400

Is there a template I should use?
Yup:
http://reprap.org/wiki/Example

But I've loaded it into
http://reprap.org/wiki/Plumbstruder
so you just need to log in and start doing up photos and text. :D

Thanks for helping out!

Re: Hot End Options?

Sublime — Fri, 06 May 2011 01:12:29 -0400

SebastienBailard Wrote:
-------------------------------------------------------
> I'm documenting the entire build this time
>
> Hmmm ... want to do it up in the
> Plumbstruder wiki page? (:D

That should not be a problem. Is there a template I should use?

Re: Hot End Options?

SebastienBailard — Fri, 06 May 2011 01:06:51 -0400

I'm documenting the entire build this time

Hmmm ... want to do it up in the
Plumbstruder wiki page? (:D

Re: Hot End Options?

Sublime — Fri, 06 May 2011 01:02:46 -0400

I mentioned how I did it in the notes at the very bottom, but here it is again.

All holes were drilled using a cordless hand drill.
The hollow brass bolts were made by spinning the bolt in the drill while holding the drill bit with pliers. (0.4mm hole drilled while holding the bit in my fingers)

A similar technique can be found [staff.bath.ac.uk]

And this is how most repStrappers are building there wades. (including myself) [www.thingiverse.com]

Re: Hot End Options?

SmurfKiller — Fri, 06 May 2011 00:52:05 -0400

Thanks for the reply. I must of skimmed over part of the text. but it looks like i could make this with a drill press and some sort of jig?

[reprap.org] <-- as noted in this wiki entry.

That with the wade's geared extruder shouldn't be too hard to make without a lathe. I think :)

Re: Hot End Options?

Sublime — Thu, 05 May 2011 23:57:08 -0400

Removed, I recommend buying a J-head or Makergear hotend now.

Hot End Options?

SmurfKiller — Thu, 05 May 2011 23:39:27 -0400

Hi all, I am trying to track down parts to build a Prusa Mendel and I have found almost everything I need, except for the hot end. I do not have access to the tools required to build one myself, from what I understand I need a lathe. And getting one just for this is just stupid :)

Is there anywhere where I could source one? Or an alternate option? One which could be built with tools that are not going to break the bank :)