servo motor in animatronic hand

[featherheart9]

I am workng on this project
https://www.instructables.com/id/Arduino-Wireless-Animatronic-Hand/

but i have micro servomotor SG90 (9g)
Please tell me which servo motor can i use..
can i use this microservomotor..

 

[cowboybob]

Difficult to suggest a particular servo since that will depend on your application torque requirements.

Since you have the SG90s, might as well use them until you have a better handle on your design needs.

Cool project, by the way....

 

[featherheart9]

Difficult to suggest a particular servo since that will depend on your application torque requirements.

Since you have the SG90s, might as well use them until you have a better handle on your design needs.

Cool project, by the way....

Thank you for replying but i tried with sg90 (only this is avaible in my lab) and it didnt work...its rotational speed is actually very small..
and i checked for servo motors with greater torque ..but they are costly...
now i am thnking of using simple dc motor(i have dc motors) and i even tried but cant control its speed with potentiometer only .. can you suggest something else..

 

[ronsimpson]

Dimension: 22mm x 11.5mm x 22.5mm
Net Weight: 9 grams
Operating speed: 0.12second/ 60degree ( 4.8V no load)
Stall Torque (4.8V): 17.5oz /in (1kg/cm)
Temperature range: -30 to +60
Dead band width: 7usec
Operating voltage: 3.0V~7.2V
Fit for ALL kind of R/C Toys

Operating speed: 0.12second/ 60degree ( 4.8V no load) How fast do you want?

 

[featherheart9]

Operating speed: 0.12second/ 60degree ( 4.8V no load) How fast do you want?

motor specification is not given on the project details..but i tried sg90 and it doesnt work...i just want instantaneous response.
so i thought of using dc motor..i just need precise control over its speed.
can you suggest how can i have precise control over dc motor speed

 

[ronsimpson]

How close is 0.1 seconds to "instantaneous".
How fast can you move your finger.
You may have other delays in the system.
>If your system is what is in the video.....
>>There is a radio link, computer board, finger sensors, servo controller etc. Each has a delay.

I have a servo controller, one of its features is to set the maximum speed of a servo. If set to slow it really is slow. If set to max the servo jumps.

 

[cowboybob]

A servo is a completely different beast than a "simple dc motor".

It's not just the speed of the response you need, it's the repeatable control of the position of the shaft.

This has a reasonable explaination of the differences:

**broken link removed**