T-motor P60 KV340 cutting system
robot lawnmower

Time to choose the components for the cutting system

I want to continue on the design of the Valify Robot Lawnmower and now need to know what components is needed too complete the cutting system. I know what functions I want to have on the robot. So here is some basic ideas on how it will work/function:

The Robot will have 3 cutting blades and will use 3 independent motors, 1 motor for each blade. Each motor can be adjusted in height with an linear servo (Linear Actuators).

Miniature Linear Actuator
Miniature Linear Actuator

The space is limited inside the robot and I don’t think I can managed to fit the Actuator vertically. So Need to think about a different mounting option for the Actuators. My Original idea looked like this:

3D printing lawnmower cutting system
3D printing lawnmower cutting system

The problem with this layout was that the 2 motor and Actuators in front could not fit within the height. So I Need to make a new layout with some semi horizontal mount for the Actuators (More about this part later on).

I have also started looking for what kind of motors to use for the cutting system. Because of the limited space I ended up buying 3pcs of the T-motor P60 KV340. The P60 suited the Valify robot lawnmower needs. It was not taking up to much space (height) as most of the brushed DC motors do. Some of the P60 features include: Low noise, impact resistant, Dustproof, waterproof. Great motors for my lawnmower project.

T-motor P60 KV340 cutting system
T-motor P60 KV340 cutting system

 

The dimensions for is only 69×33,5mm and a weight around 375grams which motor with included cables.demensions for T-motor P60 KV340

demensions for T-motor P60 KV340

The T-Motor P60 is an brushless motor. To be able to control them I also bought 3pcs of T-motor AIR 40A ECS (Electronic speed control). The ECS can later on be controlled with an Arduino, Teensy or even the Jetson TX2(more about this later)

Please note that I will use VESC instead of the T-motor ECS.

ECS and arduino
ECS and arduino

 

As always, Its great to know what components the robot is going to use, this save plenty of time later down the line. I hate to re-model parts. So to have a basic Idea on what components going to be used is key for having a better workflow (note: some re-modeling will always happened)

I will continue to work on the design for the cutting system and upload it here tonight when done with some nice animations on how it will look and work.

 

 

raess

Chief Technology Officer with a demonstrated history of working in the internet industry. Skilled in Business Planning, Computer-Aided Design (CAD), Quality Process Development, and SolidWorks. Strong business development professional with a Higher Education Diploma with specialization in Mechanical Engineering focused in Product development from Blekinge Institute of Technology.

http://valify.se

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