Stepper motors, once again :)

Submitted by jbot on Mon, 11/30/2020 - 05:20

Hi Guys,

the more i dive into robotics, the more i feel the need to use stepper motors.

Especially on the inmov head/neck it could be a cool option to remove the servo noises, also steppers are pretty cheap, thanks due to 3d printing massproduction :) Sure the code would need a lot of adjustment, and positioning is also a challange, end stops, hall sensors, but its fun! :)

I know this topic was there in the past already, whats the current situation, is it work in progress? 

Iam thinking about steppers like NEMA17, bi-polar, 4wire. What are your thoughts? 
 

Greetings from Hamburg, germany

 

Implementing MRL in mechDOG ›
jinx's picture

i would certianly explore

Submitted by jinx on Tue, 12/01/2020 - 09:36.

https://www.youtube.com/watch?v=rY7NDBnz7Cw&feature=youtu.be

i would certianly explore steppers in a closed loop setup like  the

Makerbase MKS SERVO42B V1.0 Closed Loop Driver,  not something ive played with yet  but I certainly intend to explore in the new year for robotics 

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VALL-E's picture

Hello, it is not good idea to

Submitted by VALL-E on Tue, 12/01/2020 - 21:16.

Hello, it is not good idea to use steppers in robotics.

Steppers are heavy and have relatively low torque. They are often used in industrial robots.

For example: https://www.youtube.com/watch?v=-69raWQ2DUc

but they are bad for mobile robots.

https://www.youtube.com/watch?v=-mLuU1Nscu4

Good idea to use BLDC motors with controller like thise

https://odriverobotics.com/

But it is very expensive for home craft

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psh's picture

Replacement for servo and stepper motors

Submitted by psh on Fri, 12/04/2020 - 06:46.

I am going to sit back and wait for electroactive polymers or super-coiled polymers. A fraction of the weight and mass of a motor and no moving parts.  See:https://youtu.be/vVhUBENOqhg

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