Robot Arm precision test with a Laser! 

Thank you! Haha I'm glad you saw it. The truth is that it is not the best video to show the repeatability of the robot hehe

Thank you! Yes, I will share more information about this project in the next video

Thank you! I currently use Labview, Arduino and Microchip PIC to move it. In the near future, I will adapt the hardware to use ROS

@@MRBEngineering Nice, for ROS i think you can install it on raspberry pi . Good luck

Totally agree, you are right, but I did it this way just to preserve the design that I liked, not for efficiency. Thank you for your comment :)

No, instead, I use worm gears to transmit motion unidirectionally

@@MRBEngineering that's not what I was referring to.... let me ask the question a different way if there was loss of power .... or if you're Drive or controller faulted ... whether or not the arm would be able to support the payload

@@772777777777777 I think I have understood you perfectly. If there was a loss of power, the robot arm would be able to hold in place due to the worm gear reducers, because they can only transmit the movement unidirectionally, so the weight of the robot wouldn't be able to rotate the joints.

@@MRBEngineering for this robot you may be lucky...... i have a 26kg payload i may experance creep and slippage for my application.. . I dont want add backlash if im using expensive cycloid gear box in my design. If it work for you great.

Stepper motors. There are NEMA 17, 23 and 24

From this web site www.rta-iberica.es/es I used these models: 1st DoF: 103-H7126-1740 (NEMA 23) 2nd DoF: 103-H7823-1740 (NEMA 24) 3rd DoF: 103-H7126-6640 (NEMA 23) And from this one www.omc-stepperonline.com/ I used these others: 4th DoF: 23HS22-2804S-PG47 (NEMA 23) 5th & 6th DoF: 17HS19-1684S-PG5 (NEMA 17)

With all that CNC aluminium and fancy actuators I'd say about $10k

@@BrotherCreamySince I did all the parts by my self, the price is so much lower than that.

MRB.Engineering It still cost you all your time and machine time. His question is "how much would you be willing to make another one for?". I guess not less than $10k.

@@BrotherCreamyYou are right. I thought he only refer to the price of the components, not the total cost to do it

What is the price of only the components tho?

Its pretty easy to criticize, where is the videos of your robot arm?

Ever heard of constructive criticism?

@@DUIofPhysics So the guy designs and builds his own cycloidal drives but should just use a pulleys and belts instead.Lol

'lol' That's not what anyone here actually said. He said that he might as well give it a go 'going all the way' using brushless too instead of stepper. Though, Direct drive wouldn't work in this kind of application due to the constant torque requirements of holding the robot arm in position would be excessive, you do want harmonic or cycloidal actuators in each axis ideally. There is a few points that 'JustTestingOnce' is wrong, however instead of addressing the actual contents of what he said, you go straight for the 'who said it' rather then what was said.

@@DUIofPhysics Any one who knows anything about what is going on here would take it the first comment as a insult. First he has gone and done what a lot of guys dont have the balls to do and built his own cycloidal reducers. Show me a brushless motor that can come close to the performance of a stepper at the same price point, that means including encoders and drives. You wont find many easily or cheaply available. Ideally he would be using AC servos but the price point is just out of reach of what most people want to spend. Obviously there is many differences between stepper, dc and ac servos but price wise steppers make sense. Look at the 3d printing industry, not many dc servos there.