Tutorial for new Inmoov hands with servos in palms?

[jeffrey morris]

There's a tutorial for assembling the new Inmoov hands that has servos in forearms. I can't find the tutorial for assembling the new Inmoov hands that has servos in palms. Will it be coming?

[gael langevin]

Hello,

I haven't done that tutorial because I expected users to be able to build it directly from the pictures I provided.

If you have questions, just let me know.

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

Le ven. 15 juil. 2022 à 16:50, jeffrey morris <jeffreym...@gmail.com> a écrit :

There's a tutorial for assembling the new Inmoov hands that has servos in forearms. I can't find the tutorial for assembling the new Inmoov hands that has servos in palms. Will it be coming?

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[Corey Johnson]

Hello and thank you for your work on this Gael!

Does the new Hand i2 still connect to the current forearm? I had just started printing the original hand & forearm so trying to understand which parts I need to continue with and which are no longer needed.

[gael langevin]

Yes, you can use the original forearm and servo bed. You will need to replace the inner parts in the wrist to allow the PTFE tubes to go through.

Gael Langevin

Creator of InMoov

InMoov Robot

@inmoov

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[Ray Edgley]

If it is any help. I have been building the new hand with minor mods on my YouTube channel.

Where ever I have changed from a standard build, I have mentioned it and also described the standard method.

Apart from the hand it's self, most of the forearm and servo bed is the same, the tendon tensioner at the front of the servo bed is changed with another servo mount, this servo is the one that was removed from inside the wrist to give more room for the new PTFE tubes the tendons move in.

Building the new hand is a bit easier than the old hand, only have to worry about 5 fishing lines instead of 10 :-)

If you have trouble with the finger tip cover moulds and can print TPU or TPE, I have a positive version of the STL available.
This was created based of Gael's work by Haracini from the Bot Design Discord group.

The first two videos is building the forearm, the next two are construction of the hand it's self.

the 5th and 6th video is where I start to change things a little :-)

The Seventh video still to be released is back to a mostly standard build attaching the tendons to the servos.

Part 1: https://youtu.be/3VWuqwCIxDw

Part 2: https://youtu.be/VgAa5UBpuRg

Part 3: https://youtu.be/rgBtbIc0OU4

Part 4: https://youtu.be/UUZfpXdFwSQ

Remaining parts still to be released :-)

Ray

[jeffrey morris]

How can I get the  positive version of  finger tip STL files?

[Ray Edgley]

If you look in this github repository you will find three finger tip moulds, you will need 4 of the Finger_TipV1 and one of either of the thumbs

https://github.com/Cyber-One/Fred_Inmoov/tree/main/Parts

[Dave B.]

I've been following this thread with interest essentially since I've been struggling with a birds nest of fishing line :-)  - question is where can I get the STL files for  the new hand?

Thanks 

Dave

[Corey Johnson]

At the bottom: http://inmoov.fr/inmoov-hand/

[Dave B.]

Thanks Corey - 

Dave

[Corey Johnson]

I made my mold, lubed it up, filled with silicon, and now looks like I have a brick that I cannot use :)

Ray - I have never printed with TPU or TPE - which do you recommend for the finger tips? (I assume you have successfully printed and have them in use) One of my printers is direct drive so was thinking of trying the models you have available. Sounds like TPU is easier to print but concerned about the rigidity of it not giving the desired goal.

[Ray Edgley]

What did you use for a Lube? you really need to use a proper mould release, and apparently, bees wax will prevent silicon from setting :-)
Not having had a successful mould pour, I used TPE (Had it on hand)

Things I have learned since I got my TPE a number of years ago.

TPE and TPU are more hydroscopic than PLA is, use a dry box feeder for it, I made my own.
Print slowly with it. If you normally print at 50mm/S then start at 20mm/s and go down from there.
I use a Flexion direct drive extruder, if you print two fast, the filament being soft and flexible will escape out the side of the extruder, if that happens, slow down.

TPU is a branch of the TPE family, so I found out :-)
The lower the shore number the softer the printed parts and the harder it is to print, Mine are around shore 94, but there are some a lot softer.

Use thinner walls, I normally print 2mm thick walls, top and bottom, however the thicker the wall, the firmer the print is, we want soft, so look at 0.8mm walls

Hope that helps.

Ray

[Corey Johnson]

I had originally rubbed them down with cooking oil and then even though they still felt slick, sprayed them with a cooking spray... obviously this did not work for me but read somewhere either here or on the FB group that it had worked for someone. I don't really mind reprinting it to try again but would definitely want to try a BETTER way. If bee's wax will work, I can try that way. Maybe a better silicone too if anyone knows of one.

[Corey Johnson]

Any thoughts on:

https://www.amazon.com/dp/B07V5FFPWC?tag=ck0f2-20&linkCode=osi&th=1&psc=1

and 

https://www.amazon.com/Silicone-Release-Spray-Agent-Aerosol/dp/B085CBSS5Y/ref=pd_bxgy_sccl_2/141-8939882-6523228?pd_rd_w=nxC9S&content-id=amzn1.sym.7757a8b5-874e-4a67-9d85-54ed32f01737&pf_rd_p=7757a8b5-874e-4a67-9d85-54ed32f01737&pf_rd_r=ZW97AMDY15ZVK00ZZPHT&pd_rd_wg=TgMno&pd_rd_r=981d3b50-44eb-4c39-b023-b79fa36d3dc5&pd_rd_i=B085CBSS5Y&psc=1