Juki nozzle holder for automatic tool changer.

[Pierluigi Garaventa]

Hi,

 I'm wondering if some one can help me.

I'm in the process to build a pick and place machine, here what I have build so far:

https://www.instagram.com/reel/DL2Di_3NGwx/

I would like to be able to change juki nozzle automatic.

On the holder that I currently using, it's very hard to remove the nozzle.

It's involve a lot of force.

I was wondering if some one can suggest a better holder and where I can buy it.

In this video there is a holder that should do the job, but I have no idea where to buy it.

Minute 0:58  of

https://www.youtube.com/watch?v=RzuJ1hW_xzY

Thank you,

Pierluigi

[AE's Life]

Hi,

I have same type of issue before, some joki nozzle holder use sealing ring to provide snapping force, you can change the sealing ring to a bit loose one, then the force will be reduced. 

If you are using stepper motor to control Z axis, when loading/unloading the nozzle, you can reduce the speed, that helps as well.

BR

xpLiao @xpDIY.io

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[Mike Menci]

Low force needed is on this Juki Holders  you can find more similar here. 

[Pierluigi Garaventa]

Thank you for the information.

I'm using this sort of head. The Nozzle uses a spring to come back in position.

The spring is relatively strong, but not enough to remove the nozzle from my holder. 

The stepper motor only pushes the nozzle down, and the spring brings the nozzle back in position.

About the sealing ring, it seems like a good idea. I believe I need a sort of cylindrical ring, any idea where to get it?

The juki Holder that Mike suggested seems the same that I'm using now.

I'm wondering if I have one with bad tolerance.

I found this on Aliexpress...

Anyone have experience with this type of nozzle holder?

Can it be used for "painless" tool change?

For my machine I believe I need one slightly shorter... I have no idea where to buy a short one.

Thank you,

Pierluigi

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[vespaman]

Hi Pierluigi,

I have a similar setup (charmhigh chm-t48), and on these machines the push/pull with Z motor + spring is not sufficiently strong to use this kind of nozzle change. If your motor+spring is stronger, then it might work, but my gut feeling is that it will not work (reliably). Since you don't seem to have any obstacle near your nozzle holders (like a drag pin), you might find a "wedge solution", using your X/Y motors instead. 

 - Micael

[AE's Life]

I am using the elastic rubber tube like this, you can cut it like 1cm length and choose different diameter and thickness for different force.

BR

xpLiao @xpDIY.io

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[Pierluigi Garaventa]

Thank you for the feedback.

Definitely I'll try with the rubber tube.

Pierluigi

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[Ivano Gennero]

Hi Pierluigi,

I had the same problem: too hard to strong to remove the nozzle and vacuum leak.

I heve solved with custom made holder with o-ring on the nozzle:

 

Could you see it working here:

https://youtu.be/JsLVsnqwEjA

Ciao

Ivano

[Pierluigi Garaventa]

Ciao Ivano,

 thank you for your comment.

Your solution seems to work really well.

I ordered a couple of elastic rubber pipes...  I want to see if I have a better result with my current setup.

If not,  I'm going to implement a custom solution. 

I'll keep in mind your idea, did you make it by yourself ?

Pierluigi

To view this discussion visit https://groups.google.com/d/msgid/openpnp/7c432bdf-45a3-48c3-a4a6-01a390a367b4n%40googlegroups.com.

[Markus Rechberger]

https://streamable.com/6k7yod

I'm using those ones for over 2 years they work very well and are tool/nozzlechanger friendly.

To view this discussion visit https://groups.google.com/d/msgid/openpnp/CAMDb9pa%2Bmzhdsf8o-nu8qTp_HqD7mr5hNT-Ot3BVwcfwXciz2A%40mail.gmail.com.

[Pierluigi Garaventa]

Hi Markus,

 thank you for your video.

How does your nozzle holder work ? 

Is it press fit? 

Is it magnetic?

Where to buy it?

Thank,

Pierluigi

To view this discussion visit https://groups.google.com/d/msgid/openpnp/CA%2BO4pCKHZirrvxPq%3DV97gd3yjGZneTtJ27BFmJG1UgY0FXXUtA%40mail.gmail.com.

[Markus Rechberger]

I designed it a few years ago and a senior operator turned it with his lathe, before I got my own one. I still have a few left in Taiwan that can be shipped if someone is interested (shipping via post office is cheap)

Due to the 3 point screws the centering can be adjusted a little bit. Air leakage is not noticeable.

The nozzle holder is magnetic.

It's made of soft steel and nickel coated, there's no magnetic flux noticeable outside of the holder, neither are the tips magnetic.

There is no runout with my nozzles if I lock the head and only rotate the nozzles in the holder - I know some here have this issue.

The nozzles themselves I bought from aliexpress 3 years ago (so don't ask me where I bought it... from the same vendor I received a few stainless nozzles as well which do not work with the magnetic holder, so this needs to be checked with the seller first it needs to be a ferrous material).

For the nozzlechanger - you will have to figure out yourself what fits best for you and it depends on your system. 

If you can lower your nozzle deep enough you could use a shutter system, if you cannot go deep enough you'd need to slide in from the side somewhere and pull it off.

Currently I need to slide in from the side (or pull it off by hand), but the next PNP head version will be deep enough so I can use a shutter.

If you cannot unlock the nozzle with enough Z power you might have to work on some mechanism to pull the nozzle off.

I have easily placed few 100k components with it so far (mostly 0402).

Some side information: the holder can stand crashes - but the 5mm shaft of the motor will be bent 

The hollow shaft motor has to be replaced when that happens, so just don't forget to use some strain relief on the electrical cables on the PNP head.

There's also an adapter for the rotary joint available (made of brass).

I'm in discord / openpnp / markus5965

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[Ivano Gennero]

Yes, I have made it by lathe.

[Pierluigi Garaventa]

Hi Markus,

 my juki nozzles are all ferromagnetic. 

If I place a magnet to the holder the juki nozzle becomes magnetic.

SMD component sticks to the juki point also without vacuum.

Do you have the same problem?

Pierluigi

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[Markus Rechberger]

On Tue, Jul 22, 2025 at 10:48 AM Pierluigi Garaventa <pglab.el...@gmail.com> wrote:

Hi Markus,

 my juki nozzles are all ferromagnetic. 

If I place a magnet to the holder the juki nozzle becomes magnetic.

SMD component sticks to the juki point also without vacuum.

Do you have the same problem?

https://streamable.com/fnrri3

does this answer the question?

I am not at the location of my DIY PNP machine, I plan to install the holder which I have in my hand on a commercial machine where the vendor charges like 100-150$ for a nozzle...

I don't know the quality of this particular juki nozzle itself, it has been unused at that location for over 3 years, I'm using black ones as mentioned.

Markus

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[Pierluigi Garaventa]

Hi Markus,

 thank you so much for the video.

Probably I have a completely different type of nozzle ... this is what happens if I stick a magnet on the back of my nozzle.

Pierluigi

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[Markus Rechberger]

On Tue, Jul 22, 2025 at 1:29 PM Pierluigi Garaventa <pglab.el...@gmail.com> wrote:

Hi Markus,

 thank you so much for the video.

Probably I have a completely different type of nozzle ... this is what happens if I stick a magnet on the back of my nozzle.

hah very interesting. I only heard about it but never experienced it myself.

My nozzles are not shiny, none of them. That either suggests that they are made of stainless (non magnetic) or ferromagnetic material and coated.

If they are ferromagnetic and not coated they might corrode - in places like Taiwan non coated iron won't stand long the country is a real threat to everything that

can corrode due to the high humidity. I did not have that experience in central Europe where everything is dry.

I advise to put those nozzles into a collection for wrong purchases, get other ones and never look back.

I can even touch magnetic ferrite beads and they won't be attracted.

https://streamable.com/wuz5s3

 

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[Mike Menci]

Well fake and copies and clones .... nothing you can do - if you are lucky you get non-metal one if not than this!

[Pierluigi Garaventa]

I think I've been "lucky" two times.

I have another nozzle that is completely NOT magnetic from the side that fits the nozzle holder.

To view this discussion visit https://groups.google.com/d/msgid/openpnp/e9ae0f03-d8a4-478a-b70c-9a9a79382789n%40googlegroups.com.

[Pierluigi Garaventa]

It seems that the elastic rubber tube makes it work.

I'm using this one.

Here is a short video.

Pierluigi

[Tao Qu]

Hi, Pierluigi

Perhaps this can give you some inspiration, i have a machine in your video.

Hope you can access the video below normally.

https://www.bilibili.com/video/BV1BKvMeeE5n

Pierluigi Garaventa <pglab.el...@gmail.com> 于2025年7月20日周日 10:09写道：

[Pierluigi Garaventa]

Hi Tao,

 thank you for the link.

Unfortunately I have no idea where to buy TornadoSmt nozzle holders.

It seems to work really well.

Pierluigi

To view this discussion visit https://groups.google.com/d/msgid/openpnp/CAM6XcXXcfM8DwxpLPL5d11tYgDx%3DmaV9rHW%2BcHp7%3D%2BDrvieJxA%40mail.gmail.com.

[Tao Qu]

Hi, Pierluigi

Here is a link to the video by the author of TornadoSMT, https://www.bilibili.com/video/BV1Xg411i7kt , you can take a look, the video segment 0:12:50-0:15:00, and also 0:23:50.

If you can't ensure the stability of the spring retraction action, perhaps your Z-axis motor needs to change the structure to provide upward driving force to both Nozzles.

I provided a photograph of the structure of the TornadoSMT to control the reciprocating motion of the two Nozzles through a single pendulum.

In addition, TornadoSMT does not seem to sell components, maybe you can contact the author Alan in the https://www.alandesign.cn/.

Hope this can help you. Good luck to you.  

Pierluigi Garaventa <pglab.el...@gmail.com> 于2025年7月26日周六 17:20写道：

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[vespaman]

Hi Tao,

Thank you for the picture.

Interesting solution of the Tornado head! I have not seen this on any other machine, but to me this looks like one of the better solutions, esp with the nozzle up sensors on top. Is there any downside with this setup, that I am missing? 
I guess it might be a little slower than the other designs, but not by much, so I wonder why this is not more common?

  - Micael

[Mike Menci]

Can not see the video without registration to Bilibili video app !?  

Poslano iz iPhon-a

Dne 28. jul. 2025 ob 10:37 je oseba vespaman <micael....@gmail.com> zapisala:



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[Tao Qu]

Hi，

Maybe this is available：https://www.youtube.com/watch?v=gli56THSKew

[Mike Menci]

Yes this is better but   0:12:50-0:15:00 +  and also 0:23:50  is speech in Chinese  (which I do not understand) and nothing changes in video !? 

[vespaman]

It's not the same time index between them, so you'll have to cue to the parts that interests you. I also do not speak Chinese, but you get some of it anyway. The interesting part imo, is the Z push/pull solution using only one wheel, which looks clever to me.

By the way, I had no issues viewing the Bilibili video on my computer, I just closed the login request..

 - Micael

[Mike Menci]

Michael - this should work with YouTube = https://www.youtube.com/watch?v=gli56THSKew&t=1453s

[Pierluigi Garaventa]

I found a similar one on Aliexpress .

It seems longer.

When received, I'll try to modify it and make it shorter.

Let's see if it's going to work.

Pierluigi

To view this discussion visit https://groups.google.com/d/msgid/openpnp/789c3866-012f-4ebc-a284-1fb435d42e34n%40googlegroups.com.

[Mike Menci]

Here the holder for Juki : 

[Mike Menci]

Price 35 Eur or 40 USD -+postage and shipping ...  PM to me