Posts made by tony73

@joergs5
Hello! how is the design of the six-axis robot progressing? I look every now and then if there is any news!

@joergs5
bye! I follow you step by step on the work you are doing! I am waiting to see the differential screw reducer, to understand how it should be built! me to learn how to use a lathe, or watched the videos of (delfino brunelli) on you tube! he has a lathe from the early 1900s, rearranging by him with high precision is what he does with that lathe is amazing! I consider it the best I've seen among many!

@joergs5
hi,I looked at the project of the differential screw and read the various measures, but I cannot understand how it would be assembled, I do not know this type of reducer. I think I understand that there are pulleys, screws and a linear guide, if built with high precision can the backlash be zero or very low?

@joergs5
I'm here, waiting for you to publish the instructions! I would like to know if the prototype you built of the 5-axis robot, were you able to print objects with it?

@joergs5
bye! it's been a long time since I let myself be heard! I would like to know if you are continuing the robot arm project, I have had many commitments, but now that it is better I would like to continue building a prototype!

@3dpotter
Hello! how does the configuration on the robot proceed? I am building a 5-axis robot, but the work is slow! if you have time to write how it goes with yours, it will be of great help!

@3dpotter
Hello! how does the little robot work? can it be configured with five axis robot?

@joergs5
all the time you need! no problems! I'm just trying to figure out where you are, so let's keep in touch! I have recovered several reader heads (vhs)! I'm putting together a robot with these! let's see how it will go!

@joergs5
good morning! have you done any other tests? is there any news?

@JoergS5
Hi ! what is the current situation on the robot? have you started building a new one?

@JoergS5
I'm very pleased to hear from you too, I waited so as not to disturb you but I'm here !!! and i want to do what i can to help you and get to make a robot arm with duet !!!

@JoergS5
Hi! how are you? About a month ago I bought a used harmonic drive, the 14 - 50 complete with body and cross roller bearing. I found that when it is mounted on a robot, with the engine off, with a large load, the joint can fall, but it is not a problem because the load should be very large !!! the ratio of 14 - 50, that is 1 to 50 creates a very big brake! I tell you this because I did not know that a harmonic drive could rotate with the engine off, I was amazed to see this thing! I'll put you a video link of a guy showing this behavior, on a 3d printed robot! ľ articulation that rotates is a 14 - 50 like mine !!
https://m.youtube.com/watch?v=766F_8LPM9c

@koaldesigns
Hi! i followed all the dialogue between you and dc42, how does the firmware work now? is it possible to have the .cpp and the .h with the new changes?

@koaldesigns
Hi! I built a scara like yours, I've been following you since you made this post

it would be very useful! be able to use a 4 axis that holds position on the distal end, as you are trying to do! were you able to get your modified firmware to work?

@JoergS5
is everything okay with you? I hope so !! in my family and relatives everything is fine! I wait for your prototype and I agree with you! choosing belts and pulleys is a good idea! The perfect but expensive alternative is with harmonic drive !!! if you do the firmware for the 6-axis robot it will be the maximumof the masterpiece !!!! I discovered something that could be useful, I helped a friend to fix an old VHS video recorder, the rotating head (this in the photo)

it is aluminum, two bearings a steel shaft, the two aluminum cylinders of the head are (similar) to a crossed roller bearing, it is very precise, tested with comparator! ľ steel axle is 6mm, it can carry not very big weight, but it could be used for a robot like your prototype, but smaller size !! too much weight can be a problem !!

@JoergS5
Merry Christmas!! how does the modification of the robot proceed?

@JoergS5
Hello! how is the construction of the robot going?

@JoergS5
Hi! were you able to try the print?

@JoergS5
can you tell me where you bought the cylinders for the cross roller bearing?