Just want to show the first pic of my new experimental hotend.

3D Printing
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Just want to show the first pic of my new experimental hotend.
There are a lot of things different compared to other hotends on the market.
This is actually only a test to find the limits of my tools. The main problem is actually to drill a 0.3 mm hole in the nozzle. The drills I have are not very good and designed to drill pcb’s.
Monday / Tuesday I’ll make a new nozzle an finish the cooler.
The heater block is actually not very beautiful, for a prototype it’s OK.

Originally I haven’t planed to build the hotend right now, but unfortunately I need the final dimensions to design the print head of my new printer. And therefor I need to nail the hotend design more or less.

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Copper is right!

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Did you make the aluminum heatsink as well? Probably isn’t too hard to make on a lathe.

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This part is made by a colleague. He had some time and is very good at a lathe. But yes, with the right tools its quite easy to make such a part.
As I said, this part is not finished yet. And during the maschining of the part I’ve already learned what I should change in the next version.
But thats the reason why you should make prototypes :wink:

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Btw, does anyone know where I can find reasonable thermistors with an M3 thread?

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There’s a few. Look up “M3 thermistor” on eBay.

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I think your heat break should have a much smaller cross sectional area, otherwise it will be very hard to control the heat creep.

Also, nozzles can be bought pretty cheaply. It seems the tiniest hole is the hardest to get right.

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@Jeff_DeMaagd
Yes I’ve seem them. But normally they are not specified up to the Temperatur we need.
And yes, it is planed to reduce the cross section area. But I have to make this part new anyways. Therefor I stopped at this point. Actually I’m waiting for the new reamer, the new drills and some other small parts and tools.

In this design it is not possible to use a standard nozzle. Therefor I have to make them by my self.

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May I ask what’s so different? Does not look that radical to me. But I’ve seen so many designs here at Ultimaker…

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Nothing radical. “different” does not always mean “radical” :wink:
I think all the other hotends on the market have shown that they are already good in certain areas. But flexibility is (at least in my eyes) a major problem.
For example pla and all metal hotends. Especially when we talk about the stainless steel part. Or to be more precise the friction coefficient of molten pla and stainless steel.
You could use ptfe liner, but then you are limited in temperature.
The basic idea of this hotend is to make it as flexible as possible. High speed or high precision nozzles. High or low temp. Every material possible. Modifying the hotend as easy as changing the filament.
Ideally without tools.

Maybe you have already tried something like this at ultimaker. But as I said, different compared to other hotends on the market. Not somewhere in the workshop :wink: