Robotic Arm

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Here's a quick introduction to my Robotic Arm. If you have any questions - I'd be happy to answer them.
Richard R
Commented December 2014
@antguru... The ez robot store now has extended camera cables (60cm)...
bhouston
Commented December 2014
@Anthony,
Your robotic arm looks great. Are you going to release the print files opensource?

The robotic arm I made, from opensource files, was inspired by comments made by Stelobarry on this forum about how robotic arms like these can change the life of a person with limited mobility.

I am working towards some sort of programming that could be used to operate the arm to carry out simple tasks. My goal is to have the robotic arm search for and recognize an object asked for through a voice command and then carry out what ever task is specified.
Once I/we have the program for that, it will be released open source. Then anyone could use it to run any robotic arm controlled by EZ-Robot controllers and software.

Let us know what your intentions are with your robotic arm. If you are selling them, how much will they cost?
Brian
Commented January 2015
Not counting the gripper movement, it looks like you have four degrees of freedom in the joints. Does the EZ Robot hardware/software have the ability to handle joint relationship kinematics during coordinated moves? Trying to position the end effector to a point in space requires some tricky motion control among several servos at the same time. I am impressed with your work. I would like to follow your lead and use EZ Robot but its capability to perform coordinated joint motion is critical. Is there a software simulator that serves as a teach pendent similar to commercial arm robots? Any comments would be greatly appreciated
bhouston
Commented January 2015
@Brian, I don't know how Anthony is controlling his "virtual arm".(he kind of high jacked my post). I programmed the movements of my arm thru a series of "auto positions" and timing to get fluid motion. I don't know what your experience is with Ez Robot software but it is quite EZ to do this. What are you trying to do?
Brian
Commented January 2015
You have achieved one of my goals with fluid motions at the end effector. I am also interested in accurate positioning to points in space. In simple terms I am trying to experiment with "poor boy" polar coordinate robotic arms that approximate the motions and some functions that you find in industrial robots such as ABB, Fanuc, and MotoMan. Watch the spray painting arms used in auto manufacturing if you want to see fluid motion to perfection.

I just recently stumbled across EZ Robot and I really like what I find here. Prior to any awareness of EZ Robot, I constructed an arm with five degrees of freedom using small military surplus, aircraft DC servo motors with worm drive gearboxes. These operate best around 24-28 volts but they will run on 12VDC. The slew rate is very fast but positioning is a rather inaccurate due to gear backlash. Next I need to add feedback resolvers or encoders to close the position loop for each joint which should help with the overshoot. I am using a combination of Advanced Motion Control servo amplifiers along with a couple of home brew H-bridge PWM amps. Then I hope to be able to apply digital control using software found on EZ Robot. In conclusion, all this is a fun educational experiment. I have no intention of developing a product.
Robot
Avatarbhouston
Published on Saturday, December 13, 2014