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Question:

How do you use outputs on a Dobot Magician to do something?

Answer:

How about a grinding operation? See below for the basics. A full blown tutorial will be coming soon!

A Grinding Operation with the Dobot and a  Continuous Rotation Servo

This robot is the smoothest, speediest, most accurate and repeatable one I have ever used in CIM class… except for my Fanuc.

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How Accurate is the Dobot Magician?

Question:

Just how accurate is the Dobot Magician?

Answer:

Short answer: very accurate. To 0.007″ to be exact. Verified by an independent study student of mine using statistical analysis.
3bots In May of 2017  I purchased a Dobot Magician from an Etsy shop, as that was the only way to get them at the time. It is now available at In-Position Technologies here for $1499.00.  Use the code “chrisandjimcim”  or mention us on your PO and you will get free shipping as well as US based help and warranty service!
First thing I did, and when I say I, I mean an Independent Study student (props to Vincent Paglia , who will be going to RPI in August, see his info below!) was do an Accuracy test. They claim it is accurate to 0.2 mm, and our test on our robot proved that it was actually more accurate than that.  Try that with the robot you use for CIM class now! The only one more accurate in my classroom is my Fanuc, and it cost almost 15 times what the Dobot cost!

  For those of you into POE and “data” you can you download the spreadsheet with data points, graphs, ect here: 2017 Dobot Repeatability Data.  But this histogram says it all:
Dobot Accuracy Graph When all was said and done, our robot was accurate to about 0.18mm overall. That is 0.007″ for those of you in England… I must say, very impressed with the accuracy.

_MG_5137-4Special thanks to one of my best ever Independent study students for all of the work he did this year with me  with the Dobot. 
Vincent Paglia, son of Thomas and Regina Paglia, has been awarded a scholarship from SME. He plans to study engineering at Rensselaer Polytechnic Institute in the fall.  Vincent has played varsity and JV soccer; has played hockey at Center State for four years at the bantam and midget levels and for the high school as a senior; and is also a member of the Tech Club and National Honor Society.  He received the Rensselaer Medalist Award for outstanding achievement in math and science in 2016 and was also a Scholar-Athlete by the New York State Public High School Athletic Association (NYSPHSAA) while playing soccer and hockey. Continue Reading

My Toolbars’ Are Missing in Inventor! Where’d They Go?

Question:

Every once in a while (on a daily basis…) one of my students ends up missing one or more toolbars in Inventor. Can you tell me how to get them back?

Answer:

I bet it happens randomly, and they have done nothing to make it happen, right?!?! Well no matter… watch the video below to see how to get them back!

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NEW! Lynxmotion AL5D PLTW Guide

Question:

The guide for building the Lynxmotion AL5D robot is not easy to follow. Do you have any suggestions for building the robot?

Answer:

Of course we do!  #1: Robotshop & Lynxmotion put out a brand new guide that can be found HERE. The new guide is very easy to follow with great step by step directions as well as great instructions and diagrams. They even added a whole bunch of information on servos and how they work. Please download this immediately!

I also made a short video on “Tips & Tricks” for building it. Watch it below.

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The Dobot Magician: A REAL Educational Robot?

 
3bots

About a month ago  I purchased a Dobot Magician from an Etsy shop, as that was the only way to get them at the time. Try telling your business office you want to use school money to buy something on Etsy….  Luckily, it was a grant, and I was able to purchase it. It is now available at In-Position Technologies here for $1499.00.  Personally, I see the Laser and the the 3D printer head as novelty items, but I really want to focus on the accuracy, and the ability to teach robotics programming with it, so I will stick to the basics with PnP’s palletizing, roll angles, linear moves, joint moves and jumps.

First thing I did, and when I say I, I mean an Independent Study student (props to Vincent Paglia , who will be going to RPI in August, see his info below!) was do an Accuracy test. They claim it is accurate to 0.2 mm, and our test on our robot proved that it was actually more accurate than that.  Try that with a Lynxmotion Al5D!

  For those of you into POE and “data” you can you download the spreadsheet with data points, graphs, ect here: 2017 Dobot Repeatability Data.  But this histogram says it all:
Dobot Accuracy Graph When all was said and done, our robot was accurate to about 0.18mm overall. I must say, very impressed with the accuracy.

Do the Outputs Work?

Good question!  The answer is sort of. As of first testing, the digital outputs, at least the one I tested, workd all day long. The PWM didn’t fair so well. Early in the day I plugged in a servo, and made it move forward and backward no problem. After lunch tried to write a program using it, it crashed the software. Every. Single. Time. See the video below for more info.

Outputs in the manual do not match the ones in the software, and are then called out differently on the arm itself. After a little work with it, and some programming and a few blown LED’s (some outputs are 12 volts…) Vincent and I figured out how to do PWM and Digital outputs with the Dobot Magician.
This demo uses a continuous rotation servo as the grinder, an LED and a bunch of servo extentions I scarfed off of the “other” robots in my classroom.  

 A Grinding Operation with the Dobot and a  Continuos Rotation Servo

This robot is the smoothest, speediest, most accurate and repeatable one I have ever used in CIM class… except for my Fanuc.

Dobot Outputs: Using a VEX Pnuematic Feeder with the Dobot Magician

Vincent and I designed and built a prototype pneumatic parts feeder like the one in Robocell. It works with an output from the arm, just like it is supposed to in industry. Stay tuned for the final version; I will make it later this summer while I am at the University of Texas at Tyler.

_MG_5137-4Special thanks to one of my best ever Independent study students for all of the work he did this year with me  with the Dobot. 
Vincent Paglia, son of Thomas and Regina Paglia, has been awarded a scholarship from SME. He plans to study engineering at Rensselaer Polytechnic Institute in the fall.  Vincent has played varsity and JV soccer; has played hockey at Center State for four years at the bantam and midget levels and for the high school as a senior; and is also a member of the Tech Club and National Honor Society.  He received the Rensselaer Medalist Award for outstanding achievement in math and science in 2016 and was also a Scholar-Athlete by the New York State Public High School Athletic Association (NYSPHSAA) while playing soccer and hockey. Continue Reading

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