Welcome! Log In Create A New Profile

Advanced

Hot end design

Posted by scwerta 
Hot end design
February 28, 2012 04:00PM
Hi everyone,

Long time lurker here. I've had the chance to meet some of you at a CCHS meet before, was good to put names to faces.

I've been experimenting with a J-head derivative hot end recently and finally went with a small production run. There isn't much availability of hot ends locally, unless its custom made. Importing some of them is quite costly as well.



Here it is mounted to my Prusa.


there's more information at my blog post

any comments and CC's welcome.

Tom
Re: Hot end design
February 29, 2012 02:19PM
Let me know when you have the available to buy! Thanks, pinchies
Re: Hot end design
March 01, 2012 07:07PM
Just wondering what size is the nozzle? Do you do the 0.35mm heads?
Re: Hot end design
March 01, 2012 07:21PM
Right now, I can do 0.25mm, 0.35mm and 0.5mm. Those are the only micro drill bits I have currently. The smaller sizes are a bit harder to get right though..


0.25mm hole.
Re: Hot end design
March 01, 2012 07:34PM
Wow, 2.5 sounds pretty good? When are they available? and is it going to come complete with the Resistor and Thermistor? I've purchased 3 of these from OS and I would much rather get them here smiling smiley I assume Paypal or Pickup are ok?
Re: Hot end design
March 01, 2012 08:51PM
I'll have a limited amount (~5) next week for those that want to try them out. I'm awaiting supply of more Peek

Details about the full kit are at my blog

For now, each kit includes;
1x CNC machined nozzle (0.5mm,0.35mm or 0.25mm)
1x 40mm Peek insulator (12mm dia)
1x Axial thermistor
1x Heater resistor
12cm length of PTFE tube 4mmOD/3mmID (enough for 3 usable lengths)
1x M8 fender washer for the mount (drilled 4.5dia, 30mm spaced for Wade's type extruders)
2x M4x30 socket caps for the mount

$50Aud + postage, paypal, DD or pickup n pay cash is ok.

Just to note though, these hot ends are still very new and also quite untested! I'm quite confident they work, as they are based off the very capable J-head design. In saying that, I'll be happy to help in anyway if there are problems with it.


[kininarutom.blogspot.com.au]
[extrude3d.com]
Aussie made hot-ends
Re: Hot end design
March 04, 2012 08:50PM
My only concern is with printing PLA - isn't the Jhead only designed for ABS?
Re: Hot end design
March 04, 2012 09:20PM
pinchies Wrote:
-------------------------------------------------------
> My only concern is with printing PLA - isn't the
> Jhead only designed for ABS?


I've done 16 rolls of 3mm x 100m PLA on a Jhead and have no intention of ever changing!
Re: Hot end design
March 06, 2012 06:09PM
With my JHead I've had no problems at all printing ~500 meters of PLA and 1 jam with the 2-3 meters of ABS I tried. Might have been a problem with the ABS itself though.
Re: Hot end design
March 12, 2012 11:02PM
Gratefully received, thanks Tom. I will update once I have finished my printer and tried it out.
Re: Hot end design
March 14, 2012 12:44AM
Good to hear thanks! First batch is sold out now, but I'll have more early next week. Should be steady supply from then on as I've ordered material for at least 100 hot ends.

I've included 4x nylon washers and changed the m4x30 to m4x35s with all kits (m4x30 may be too short for some extruders).

Would love to hear any feedback from those that have received them! I've put about 50m through my hot end and it has been flawless so far.


[kininarutom.blogspot.com.au]
[extrude3d.com]
Aussie made hot-ends
Re: Hot end design
March 31, 2012 03:52PM
Hi,

I purchased a couple of hotends from Tom (0.5 and 0.35mm), after I managed to destroy the original hotend on my printer, and they were delivered in a couple of days.

I have fitted the 0.5mm one to my Longboat Prusa Mendel with no issues at all - The mounting washer provided fits the original hotend mounting bolts on my extruder with no modification at all. After running through a few calibration tests , and updating my Sprinter firmware accordingly, the results are much better than the original hotend that came with the Longboat. I've attached a photo of one of the first prints with the new hotend (note I am not an Arsenal fan, but the print was for a friend who is).

It really is great to see a local provider here in Melbourne. Keep up the great work Tom...

Jez_A
Attachments:
open | download - photo.JPG (64.1 KB)
Re: Hot end design
April 26, 2012 04:35AM
Hi Tom,
I bought one of your 0.5mm jhead for my cnc-based repstrap. Last night I finally got everything working and produced my first prints, a couple of calibration items from http://reprap.org/wiki/Calibration.

I have to say I was very pleased with the results, here's a couple of pics.
0.5mm thin wall Using Vik Ollivers translucent blue PLA
20mm box - 100% infill I have no bed heater so this one lifted a bit..

thanks for helping me to get started!
Jason
Re: Hot end design
April 26, 2012 05:51AM
JasonD Wrote:
-------------------------------------------------------
> Hi Tom,
> I bought one of your 0.5mm jhead for my cnc-based
> repstrap. Last night I finally got everything
> working and produced my first prints, a couple of
> calibration items from
> [reprap.org].
>
> I have to say I was very pleased with the results,
> here's a couple of pics.
> 0.5mm thin wall Using Vik Ollivers translucent
> blue PLA
> 20mm box - 100% infill I have no bed heater so
> this one lifted a bit..
>
> thanks for helping me to get started!
> Jason

Very cool color! I must try some next time I do an order from Vik.

Great to hear you're up and running now. You seem to have it calibrated well too as I can see the edges and corner are very well defined.

As for lifting, I find that a fan running over the newly extruded plastic also helps reduce warping. I still get lifting even with a heated bed occasionally. Probably partly due to dust/finger prints on my glass bed.


[kininarutom.blogspot.com.au]
[extrude3d.com]
Aussie made hot-ends
Re: Hot end design
April 30, 2012 08:06AM
I am very impressed with mine, have used it with pla and abs, and both printed very well, I still have some calibration to do with it, but all in all a very good hotend.
Re: Hot end design
May 05, 2012 06:36PM
Have just started with this hot end (0.35mm) very happy so far! I had one issue where the PLA swelled inside the tube, but disassembly could not be easier, and I figured out that it was my fault...

Can't recommend enough!
Re: Hot end design
June 07, 2012 09:53AM
How about an accurate thermistor table for the thermistors that you have with your kits?

Im not really interested in mapping one myself, so I put a different thermistor in so I could trust the readings, but if you have a temptable for those thermistors I wold be most appreciative.

By the way, I love this hotend and will be getting some more in the future.
Re: Hot end design
June 07, 2012 03:56PM
The thermistor in the kits is the 135-104LAF-J01, which is one of the common thermistor tables used in the sprinter/marlin firmwares. It is option 7, which is for the 135-104LAG-J01. However the 135-104LAF-J01 has better thermistor tolerance of +/-5%, rather than 10%. But they are essentially the same thermistor as far as i'm aware, as they share the same datasheet.

Have you found the accuracy of the thermistor to be inadequate?


[kininarutom.blogspot.com.au]
[extrude3d.com]
Aussie made hot-ends
Re: Hot end design
July 16, 2012 05:05AM
Something new in the works, see if anyone can spot the difference with the current hotend.



this one should make it more obvious tongue sticking out smiley



comments, cc's?


[kininarutom.blogspot.com.au]
[extrude3d.com]
Aussie made hot-ends
Re: Hot end design
July 19, 2012 03:32AM
Are you still looking at doing the 1.75mm filament version?
Re: Hot end design
July 20, 2012 04:27AM
I just got my prusa printing for the first time and your hot end worked perfectly! Very happy with the purchase.

Will get the calibration right then thinking of getting a fine nozzle.

I would be interested in a groovemount (like you've shown)
Re: Hot end design
July 20, 2012 07:57AM
pezzer2003:
No plans yet to make up a new set of nozzles suited specifically for 1.75mm filaments. The hotends do seems to handle 1.75 filament OK though with a slight modification. Using 4mmOD/2mm ID PTFE tube and also a 1.8mm entry hole in the PEEK. I have done little testing with that prototype though.

Daggy:
Great to hear you're up and running! smiling smiley


[kininarutom.blogspot.com.au]
[extrude3d.com]
Aussie made hot-ends
Re: Hot end design
August 03, 2012 06:09AM
Also interested in the groovemount! I had a little trouble with the mounting nuts on the previous design warping and melting through my extruder mount plate... now I need to find someone to reprint me the dodgy mount plate.

Edited 1 time(s). Last edit at 08/03/2012 06:12AM by pinchies.
Re: Hot end design
August 07, 2012 02:59AM
pinchies Wrote:
-------------------------------------------------------
> Also interested in the groovemount! I had a little
> trouble with the mounting nuts on the previous
> design warping and melting through my extruder
> mount plate... now I need to find someone to
> reprint me the dodgy mount plate.



The slot mounts will be available soon. I'll be happy to rework current hot ends out there with a slot, so early adopters I havent forgotten about you!

pinchies: PM me, I'll send you a replacement printed mount plate. smiling smiley

Edited 2 time(s). Last edit at 08/07/2012 03:04AM by scwerta.

[kininarutom.blogspot.com.au]
[extrude3d.com]
Aussie made hot-ends
Re: Hot end design
August 07, 2012 03:29AM
Gee, thanks Tom! smiling smiley I realised it was warping too late to reprint my own... and still haven't printed my own set of spare parts... my novice mistake.
Re: Hot end design
August 11, 2012 09:38AM
I'd like to introduce the updated version of the hot end. The X3D hot end, named after my new online store grinning smiley

Please check it out. www.eXtrude3D.com smiling smiley



I've done away with the fender washer and now included a machined aluminium mount. Price is still the same.

Also, I've added 1.75mm hot ends to the line up after completing testing with my roll of filament. I'm sticking with the same nozzles, so you dont need to have different nozzles for different filaments.



And lasty,

There is now a Bowden cable variant hot end.



More technical info on my blog, any comments and cc's welcome.


[kininarutom.blogspot.com.au]
[extrude3d.com]
Aussie made hot-ends
Re: Hot end design
October 27, 2012 09:27AM
I bought one of these in a 1.75mm filament variety .40 nozzle, scwerta was kind enough to source me most of the parts for a complete extruded, and I must say its been perfect, I now feel I'm getting better at printing and I attribute much of the success to the great extruder supplied from scwerta.

Gaz
SK
Re: Hot end design
March 12, 2014 04:58PM
This is the first hotend I've bought so can't compare to any others. I've just finished building my Prusa i3 - Modified with full steel frame & much larger 700x300x380 Build platform. I started with BilbyCNC 1.75mm ABS ($36/kg) with scwerta's 0.4mm hotend assembly and Wade's Reloaded Extruder. I was not expecting any decent results as I was starting with cheap filament & although reviews were good on scwerta's hotend - wasn't convinced it was the best out there, however was by far the cheapest except for ebay.

The results are amazing. Right off the bat I've been printing accurate parts with no issues at all with the hotend. It's been extremely reliable and quality of prints far exceeds the parts I bought to make the printer. I have not tried printing PLA yet, but for ABS it's faultless with not one blockage yet after using over 1/2kg of filament and at least 50 hot/cold cycles so far.

Very Impressed. Cheers!
Sorry, only registered users may post in this forum.

Click here to login