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J-Head Mk 12 High Temperature Development

Posted by reifsnyderb 
J-Head Mk 12 High Temperature Development
June 05, 2018 10:48AM
Hello,

Development of the new J-Head Mk 12 is going great! After one more round of positive testing, we expect to have it available at [www.hotends.com]


Here is a picture of the J-Head Mk 12 heat sink between an e3d and hexagon hot-end.


bA0dqwh.jpg

Latest video:

[youtu.be]

Edited 2 time(s). Last edit at 06/05/2018 03:33PM by reifsnyderb.
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 12:55PM
BUT,BUT that pic doesn't look like the heat block in the vid? ( appears more like the volcano in the vid )
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 01:14PM
The heater block is a vertical heater cartridge design. All new J-Heads will be using it. cool smiley

I'll post a picture of the heater block soon.

Best Regards,

Brian





Quote
jinx
BUT,BUT that pic doesn't look like the heat block in the vid? ( appears more like the volcano in the vid )
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 03:51PM
But But a Volcano heatblock is only $1, Looks more like a copy of a cheap chinese copy of your Jhead - 1
(I can only see a pic with one hotend)

Edited 2 time(s). Last edit at 06/05/2018 05:05PM by MechaBits.
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 04:00PM
I just looked up the price and e3d wants $20 for a Volcano heat block. I am not sure where you got your prices at.

The center part is the heat sink. The E3d shown is a real V5 and the Hexagon is real as well. No knock-off parts shown.

Brian



Quote
MechaBits
But a Volcano heatblock is only $1, Looks more like a copy of a cheap chinese copy of your Jhead - 1
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 04:23PM
Not the best pic, but here is the heater block.

leOcWh9.jpg
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 04:32PM
will the Mk12 have the grub screws holding the heat break into the heat sink ( think that a nice feature to bring in from the hexagon).

NO heat break! kind of hoping to see a chimera style break in the design

Edited 1 time(s). Last edit at 06/05/2018 04:45PM by jinx.
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 04:35PM
like that brass work,, but whats the stubby piece next to the threading
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 04:59PM
The aluminum piece above the brass is the heat sink for the J-Head Mk 12. cool smiley

Quote
jinx
like that brass work,, but whats the stubby piece next to the threading
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 05:01PM
Hello,

The part with the heat break isn't present in these pictures. However, the heat break has a wall thickness of about 0.25mm. So there is very little heat conduction up to the heat sink.


Quote
jinx
will the Mk12 have the grub screws holding the heat break into the heat sink ( think that a nice feature to bring in from the hexagon).

NO heat break! kind of hoping to see a chimera style break in the design
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 05:06PM
Ok, Ok $4 [www.ebay.co.uk] must have gone up since i last looked.
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 05:18PM
Well, if you are interested in a cast chinese knock-off of dubious quality, yes, around $4 or so with free shipping.

Quote
MechaBits
Ok, Ok $4 [www.ebay.co.uk] must have gone up since i last looked.
Re: J-Head Mk 12 High Temperature Development
June 05, 2018 06:52PM
Was only joking(before seeing any pic with someone mentioning the volcano), didnt want to start the whole debate over again,
good luck with it, 0.25 on the heatbreak sounds like some feat on machining.
Re: J-Head Mk 12 High Temperature Development
June 06, 2018 03:45AM
0.25 mm walls and a set screw to hold it in place? You'd need to be a surgeon to assemble this thing without crushing it. Also, that's a tiny heatsink, how effective is it and what fan will you use to cool it?
Re: J-Head Mk 12 High Temperature Development
June 06, 2018 05:47PM
There is no set screw to hold the heat break in place. The entire part that contains the heat break is one machined piece and is held in place within the brass heat block. The tiny heatsink is highly effective due to the heat break design. Practically any fan can be used for cooling.

Best Regards,

Brian



Quote
Trakyan
0.25 mm walls and a set screw to hold it in place? You'd need to be a surgeon to assemble this thing without crushing it. Also, that's a tiny heatsink, how effective is it and what fan will you use to cool it?
Re: J-Head Mk 12 High Temperature Development
June 06, 2018 08:41PM
I'm having trouble picturing how the heater block, heatbreak and heatsink go together.
Re: J-Head Mk 12 High Temperature Development
June 06, 2018 09:23PM
I'll be posing a picture of the second revision of the prototype soon. Then you'll see. smoking smiley


Quote
Trakyan
I'm having trouble picturing how the heater block, heatbreak and heatsink go together.
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