Thursday, July 24, 2014

ArrBot Class 1 Notes

Today's class will consist of two activities, 3D printer training and Arduino soldering.


  • Drop your stuff off in Big Art
  • Proceed to the 3D Printer
  • Be sure and sign the signup sheet
  • Pick up your kit
  • Don't be late, we're pressed for time!!
  • some of these notes are specific for this class.  Ignore the ones that don't make sense to you.
  • Syllabus is here:

3D Printer Training

  • This will be taught by JoshM, better known by his 3D Printing professional name "FlashMaster PrinterDimensional".  He's the contact point for all things 3DPrinterish.
  • If you're already certified for the printer, this will be a repeat.  Come and hang out anyways!
  • We have several spools of printer filament in the cabinet.  They're labelled "robot class"
  • Be sure and sign up for a printer timeslot.  If you're a beginner, it might be a good idea to partner with somebody more experienced.
  • 3D printing is not a totally solved problem.  Don't be discouraged if it takes a couple of  tries to get things right.
  • If something goes wrong, email the 3Dprint alias and let Josh know if he's there.
3D Printer Basics
  • Signing up for a timeslot
  • Turning it on
  • Loading filament
  • Taping the bed
  • Running the software
  • Choosing the resolution
  • Watching the printer on webcam
  • Removing the filament
(notice one item is bold.  that's a clue as to which one is most important)

Soldering the Arduino Micros

  • We have two Arduino micros.  They both need to be soldered.
  • The Arduino with the USB micro connector is 5 volt.
  • The Arduino with the FTDI connect is 3.3 volts. BE CAREFUL WITH THIS ONE, don't hook anything up to it yet.
  • Consult the EastBay Guide to Soldering.
  • Solder pins onto both sides of each unit.
  • Use the breadboard to line up your pins.
  • Solder right angle pins for the FTDI connector.
  • If you're familiar with Arduino, go to this Sparkfun Page and download/install the Arduino Addon Files.
  • Tools/Board will be "SparkFun Pro Micro 5V/16MHz" or the 3.3V.  These are the board options installed by the addon files.
  • If you're not familiar with Arduino, don't worry about anything but getting the two boards soldered.

3D Model Notes

  • Here's the model file.
  • If you are github-friendly, it's here.
  • I haven't figured out which mustache works with our sonar unit.
  • This model is the SparkFun Red Rover.
  • Print your robot body.
  • Have your two arduino units soldered.
  • bonus: download and install the addon files 
Update: Notes and Comments

Soldering the Arduino Micros turned out to be a lot harder than soldering the through-hole practice boards.  It turns out the solder pads are a lot smaller, and it was easy to not heat the pad when applying the soldering iron.  Instead, the pin would be heated, and when the solder was applied it would move up towards the heat, and not make contact with the pad.  This causes the little "mushrooms" where there's no contact on the bottom.

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