EZ-Inmoov Hand Parts Questions

@syed.shayan.mazahir

below the link you find all info .

https://www.ez-robot.com/store/p93/ez-inmoov-humanoid-robot-hardware-kit.html

cheap micro servo two for 16 euro  but they are not reliable .

https://nl.aliexpress.com/item/1005008672810331.html?pdp_ext_f=%7B%22sku_id%22%3A%2212000046181869296%22%7D&sourceType=1&spm=a2g0o.wish-manage-home.0.0&gatewayAdapt=glo2nld

big cheap servo's MG996 https://nl.aliexpress.com/item/1005005061251086.html?spm=a2g0o.detail.pcDetailTopMoreOtherSeller.1.8023Fbn2Fbn2jS&gps-id=pcDetailTopMoreOtherSeller&scm=1007.40050.354490.0&scm_id=1007.40050.354490.0&scm-url=1007.40050.354490.0&pvid=3fa97911-3ee7-4a67-aca3-2693db333782&_t=gps-id%3ApcDetailTopMoreOtherSeller%2Cscm-url%3A1007.40050.354490.0%2Cpvid%3A3fa97911-3ee7-4a67-aca3-2693db333782%2Ctpp_buckets%3A668%232846%238116%232002&pdp_ext_f=%7B%22order%22%3A%221233%22%2C%22eval%22%3A%221%22%2C%22sceneId%22%3A%2230050%22%2C%22fromPage%22%3A%22recommend%22%7D&pdp_npi=6%40dis%21EUR%2152.47%2116.79%21%21%21410.56%21131.37%21%40210390c917777858982816315eed76%2112000031488868167%21rec%21BE%216591664338%21XZ%211%210%21n_tag%3A-29919%3Bd%3Acd338814%3Bm03_new_user%3A-29895&utparam-url=scene%3ApcDetailTopMoreOtherSeller%7Cquery_from%3A%7Cx_object_id%3A1005005061251086%7C_p_origin_prod%3A

Here’s the most reliable place to start for the EZ-InMoov hand / hardware kit info:

• EZ-InMoov Humanoid Robot Hardware Kit:
  https://www.ez-robot.com/store/p93/ez-inmoov-humanoid-robot-hardware-kit.html

That page should be the closest thing to an official parts reference for the kit.

On your two questions

1) How many servos does the hand require?

The EZ-InMoov hand typically uses multiple micro servos per hand for the finger tendons/pulling mechanism. The exact count depends on which version of the hand you’re building and whether you’re doing one hand or both.

If you’re building the full InMoov-style robot, the servo count grows quickly across:

• hand/fingers
• wrist
• arm
• bicep/shoulder
• neck/head
• torso, etc.

Because the kit layout can differ from the original InMoov.fr design, I wouldn’t assume the BOM is identical. The safest route is to use the official EZ-InMoov hardware kit page plus the linked build docs from that product page.

2) Affordable replacements for the EZ-Robot micro HDD / HDD servos

For budget builds, many people experiment with alternatives, but the important thing is matching:

• torque
• speed
• size / mounting
• rotation range
• voltage
• servo horn style

The cheap micro servos and MG996-class servos can work in some projects, but they’re not always drop-in replacements for the original servo layout. The main issue is that InMoov-style hands can be mechanically demanding, so low-cost servos often:

• strip gears
• overheat
• drift or jitter
• fail under tendon load

Best advice for ARC users

If you’re planning to control the robot through ARC, you can still use many third-party servos as long as they’re compatible with your controller and power delivery. If a part isn’t supported directly, you can often create a robot skill to interface with it:

• Create a robot skill overview:
  https://synthiam.com/Support/Create-Robot-Skill/Overview

A practical suggestion

For the hand specifically, I’d recommend choosing servos based on:

1. required torque under load
2. availability of consistent replacement units
3. whether the servo is standard PWM, serial, or a smart servo
4. whether your power supply can handle stall current

If you want, I can help you:

• estimate the servo count for just one EZ-InMoov hand
• identify likely servo specs to look for as replacements
• suggest a budget-friendly ARC control approach for ESP32 or another controller

If you can share which exact EZ-InMoov version you’re building, I can help narrow down the parts list more accurately.

@syed.shayan.mazahir

the ez robot inmoov is diff . better and stronger build  . for the hand 5 micro servos is needed .

Thanks for sharing the image - that makes it clearer.

From the photo, the EZ-InMoov hand uses 5 micro servos per hand, which matches the standard finger tendon layout shown there.

Quick answer

• 1 hand = 5 micro servos
• 2 hands = 10 micro servos

If the build follows the full EZ-InMoov structure, the total servo count increases a lot once you add the wrists, arms, shoulders, neck, and head.

About replacements

For the hand, the servo choice matters a lot because the fingers pull against tendon tension. Cheap micro servos can work for testing, but they often fail under load.

When looking for alternatives, try to match:

• Size / mounting
• Torque
• Rotation range
• Voltage
• Horn compatibility

The MG996-class servos are usually for larger joints, not the fingers. For the hand, you’ll want a reliable micro servo with enough torque and decent gear quality.

Helpful next step

If you want, I can help you build a full servo list for:

• one hand only
• both hands
• or the entire EZ-InMoov robot

And I can also help you map the servos to an ESP32 + ARC control setup.

If you share which version of the build you’re following, I can narrow it down more precisely.

@Nomad-6R, i see, welp i really don't see any alternatives and the servos are really expensive for me to buy; i might just revert back to the original InMoov tbh, thanks for the guidance though i really do appreciate it!

That makes sense - the servo cost can add up quickly on InMoov builds.

If you go back to the original InMoov design, you’ll likely have a better chance of finding:

• more community documentation
• broader part substitutions
• existing BOM references
• more flexibility in choosing cheaper servos

If you later decide to bring it into ARC, you can still control it with a wide range of hardware, and if a specific feature isn’t already built in, you can create your own robot skill:

• Create a robot skill Overview

If you want, I can help you with either of these next:

1. a servo count / parts list for the original InMoov hand, or
2. a budget-friendly control approach in ARC for the servos you already have.

Just let me know which direction you want to take.