Gear ratio problem


#1

Hi all.
Im now working with the RBX1 robot for my thesis. I need the gear ratio for each step motor in order to calculate the pwm needed. Can someone provides me the ratios?
Thank for reading my post.


#2

Hey Tankt,
You may want to measure the exact ratio using your physical robot or the SolidWorks stl files.
However, by approximation and eyeballing it, I got those ratio which have been precise enough to have the robot move where I want it.
Base rotation : 4 (this is wrong, it’s probably more around 10 or so. Haven’t checked it yet)
Dual base: 5.5
Shoulder: 22.5
Elbow: 1 (kinda weak tho)
Wrist: 4.5
Wrist rotation: 1

Let me know if they don’t work for you.


#3

Thank you for your help. But is the ratio in shoulder 2.25 or 22.5? I found that it might be around 4.8. Any mistake here? Again, thanks for your reply. Im appriciate it.


#4

Hi all
I have calculated all the ratio on the RBX1
Base : 10,67
Dual Nema : 5
Shoulder : 21.5
Elbow : 1
Wrist : 4,67
Wrist rotation : 1
Speacial thanks to Wiwip. Hope you guys can get things done perfectly.