New neck parts don't fit together

[Mike Mossey]

I have been printing out the neck parts but the Piston parts are not fitting together.

I have tried several different brand of filament (PLA) and different layers 0.2 and 0.3mm.

The screw part (neckpistonside V1) does not fit into the part (neckpiston V2) Neither do the neck front piston parts. It is too tight of a fit.

Any helpful suggestions?
Thanks,
Mike

[Kaarel Lumi]

I've had to reduce the X and Y dimension of the pistons to get them to run smoothly. Leave Z (height) as is.
Really depends on the printer how much you need to modify. I ended up reducing X and Y by ~1 mm  but some people get away with a lot less. 0.1mm for example.

Expect to print several until you get them just right.

[Perry S]

Calibrate your printer properly and they should fit according to Gael. I do not believe many people go through this step. I did not properly calibrate and had to print them at 99.8 scale in the X and Y. After I calibrated the files fit as intended.

[Mike Mossey]

My printer prints beautifully.

I have printed other screws and nut assemblies from inmoov and other sites and they work great.

These files however do not work.

I have reduced the screw several times incrementally in x/y down to 99% and they still do not fit into the ball joint nut assembly.

At this point I am most likely going to scrap this version and try Bob Houston's files/setup. This is a serious waste of materials.

Disappointed because all of the many parts I have printed so far have worked out well.

Thanks for your suggestions. I do appreciate the input.

[gael langevin]

Hello,

Sorry to hear that you have been wasting material because of InMoov project. At least you didn't have to pay for the design, so be happy.

I strongly suggest you precisely calibrate your printer even if it prints beautifully it might be out of calibration.

These new Neck parts are tight fit to avoid backlash which induced unwanted head movements during gestures in previous models.

Here is rapid close view of the NeckPistonBaseFront.stl and the NeckPistonFront.stl to show you that there is a gap between the two parts.

Here is another close view of the NeckPistonSide.stl and the NeckPiston.stl. And also the ball joint in NeckPlateHigh.

Again you can see there is a gap.

​

I have printed these parts already three times in ABS for new InMoov sculptures I am currently building and they fit perfectly.

No sanding. To smooth their surface I use grinding powder but I also could brush a bit of acetone.

If I had to sand all these parts to make them work, it would take me ages...

​

​

​

​

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

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[amador villanueva lopez]

I've been watching the new neck for a while, but where are the servos and connections on the board and others?

Thanks for your project.

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[gael langevin]

Hello Amador,

The connections are here:

​The servos are placed as one Master, one Slave, just like in the stomach tutorial.

For the positionning of the servos have a look at this picture:

​

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

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[amador villanueva lopez]

thanks for this and for everything

[Perry S]

That neck design looks great. I have the original Bob Houston one but. Can't wait for those to be released.

[gael langevin]

Hello Perry,

They are already available on the site:

http://inmoov.fr/inmoov-stl-parts-viewer/?bodyparts=Neck

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

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[Mike Mossey]

Hi Gael,

Thanks for the reply and info.

I really appreciate what you are offering.

This project is a lot of fun.

I hope my frustration didn't upset you.

Inmoov is a great project which I fully support.

I will take your recommendations into consideration.

-Mike Mossey

Arx Mechanica

[Perry S]

GReat! Don't know how I missed those. I am on my 3rd neck now. Each time they are getting better. I really like how the ball joint is captive in this design.

[Morten Enholm]

Very nice solution / design Gael, thank you :)

Could i ask you if you would be so nice and take picture of how / where the head twist servo is now placed ?

There is a new and very good eye mech (and a surprise) coming soon, and he (designer of the mod) / we need all the room we can get in the forehead, so we

need the head twist servo to be all the way back along the back skull, lik in the mod on thingiverse :)

A bit hard to see the servo placement in the pictures you showed us, but this new neck design is a "must" :)

Btw, the new eye mech can hold 2 x rpi V2.0 / V2.1 imx219 (8mp) cameras, but thats is not the cool thing ;)

Thanks...

[Keukpa]

I'm late into this thread, but I've just printed this neck, it fits together perfectly, no problems at all....

And it's an AMAZING design! :D

[Razvan Malosh]

First of all let me start by saying thank you.

For the project, the updates, and the HUGE impact on ppls life and the future.

Second - I had the same problem.

after sanding, filing and putting the dremel to it, it still didn't fit, got stuck, and even broke.

I honestly think that it's a printer specific issue, and the scaling idea sounds best.
also, a few kg of "wasted" material, in my opinion, is definitely worth a life size, autonomous,
Human looking, robot.

[Coco love]

Hi gael

What do you mean by calibrating my printer how do i do that? cause there are other parts ive printed before like the jawpiston fits nicely together without any efforts but this one looks tight and it seems to be bigger by 0.02mm the piston sit in the opening of the the ball joint perfectly but has resistance when trying to push it inside.i think with minimal sanding and some grease it should fit.

[Cosette Michaud]

Please check the image to see how close of a fit it is.

[Coco love]

so i tried different option by increasing the the x and y axis by two mm now the part was too loose . so i turn it back to its original size and now in my slicer in enable horizontal expansion and set limit to -0.3m and now it fits perfectly without needing to scaling the model. 

On Wednesday, May 23, 2018 at 5:33:07 PM UTC+4, Mike Mossey wrote:

[gael langevin]

Hello,

I like it when you figure the things out by yourself!

Good for you!

It is not easy for me to give tips about how to set your printer since I have different printers, different ABS or PLA, and different slicer.

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

[Cosette Michaud]

Yes Gael I agree it's impossible to know printer setting of everyone. What I did that other can do in the future is adjust the horizontal expension setting and put a very low infill and print few first layer of the Piston and try it on the bolt to see which one is the best before printing the whole thing.

[gael langevin]

Very good solution!

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

[gael langevin]

Hello,

You can use the HK15298B or any similar servo.

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

Le mer. 22 mai 2019 à 22:48, Vincent Fabricio Mancera Hernandez <vncnt....@gmail.com> a écrit :

Hi Gael, Gongratulation for this proyect!

What servo motor do you recommend use?

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[Vincent Fabricio Mancera Hernandez]

Hi Gael, congratulation for this project!

For this new articulation are you using three HK15298B servo motor?

El lunes, 28 de mayo de 2018, 8:35:34 (UTC-5), gael langevin escribió:

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[gael langevin]

Hello,

I use two H15298B, one master and one slave, same connections than on the stomach tutorial.

And for the front, up and down, I use one HS805bb.

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

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