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Evil Mad Scientist Ostrich Eggbot 2.0 Assembly Manual

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Assembly Guide
The Original Egg-Bot – Version Ostrich 2.0
The Ostrich EggBot kit is the big brother of the Original EggBot kit. These kits are the product of
many years of evolution, dating back to the first EggBot, developed by motion control artist Bruce
Shapiro in 1990. The present kit was developed by Evil Mad Scientist Laboratories in cooperation
with Bruce Shapiro, Ben Trombley, and Brian Schmalz.
This kit is designed to allow you to draw on spherical & egg-shaped objects from about
4.25-6.25" (6-16 cm) in diameter. Internet access, simple tools, and a recent-generation
computer (Mac/Win/Linux) with a USB port are required.
This assembly guide covers the procedures for putting together Ostrich EggBot Kit v2.0. Typical
assembly time is estimated to be 1-2 hours. Please exercise appropriate care when building it: The
kit contains many small parts and some parts that could be sharp. Keep out of reach of small
children. Older children and teens may require adult assistance.
An open-source hardware+software project. For links to design files, source code, examples, support
resources & documentation, please visit: http://wiki.evilmadscientist.com/ostrich
Support Forum: http://forum.evilmadscientist.com/
Distributed by
Kit version 2.0
Evil Mad Science LLC
Manual v. 2.0
http://evilmadscientist.com/
11/5/2014

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Summary of Contents for Evil Mad Scientist Ostrich Eggbot 2.0

  • Page 1 The Ostrich EggBot kit is the big brother of the Original EggBot kit. These kits are the product of many years of evolution, dating back to the first EggBot, developed by motion control artist Bruce Shapiro in 1990. The present kit was developed by Evil Mad Scientist Laboratories in cooperation with Bruce Shapiro, Ben Trombley, and Brian Schmalz.
  • Page 2 STEP 0: It’s the BOM. Your kit came with a bill of materials: an up-to-date list of what’s in your particular kit. The exact items may differ very slightly between versions of the kit. In the instructions, we refer to components by their line item number on the bill of materials.
  • Page 3 STEP 1: Tool Checklist Essential tools: Needed to build and use the kit: Suggested tools: Recommended; not required 1. Small screwdriver(s) 1. Small cable ties There are several places in the assembly process where you The wires on the stepper motors are long. There are mounting will need to provide a small Phillips head or flat head holes provided in case you want to tie them up with a couple screwdriver.
  • Page 4 STEP 2: The first few parts This is the EggBot chassis, #1 on your BOM. It consists of five separate pieces. The chassis is made of CNC cut MDF with laser engraved white melamine surfaces. Beyond the tools already mentioned, three additional tools are included in the EggBot kit: A 5/64”...
  • Page 5 STEP 4: Flanged bushings, part I Nylon flanged bushings, part #5 (This piece is the inner tailstock) The two nylon flanged bushings, part #5, go into the indicated sides of the two chassis tailstock pieces. Orient the two pieces as shown, paying attention to both the outline shape and the engraved markings.
  • Page 6 STEP 5: Split bushings, part II Press the two bushings into their holes. To install one, press it into the hole until the flange is flush against the surface without any gap. [Ostrich EggBot Kit Assembly Guide]...
  • Page 7 STEP 6: Screws and Standoffs In the next step, you’ll need the five 7/8” long threaded aluminum standoffs, part #6. You’ll also need 10 pieces of part #7, the 3/8” length stainless steel button socket cap screws. (There are a total of 29 of these in the kit.) [Ostrich EggBot Kit Assembly Guide]...
  • Page 8 STEP 7: Adding Standoffs The screws go into the five holes shown, from the side that where the holes are marked with solid circles. (Note that the circles are not always well- centered around the holes.) Thread a standoff onto each screw from the opposite side.
  • Page 9 STEP 8: Mating the two tailstock pieces Test fit the two tailstock pieces together: The standoffs go against the unmarked holes on the other piece. The other five screws go into the standoffs from the other side, again through the holes with solid outlines. As you insert the screws, tighten them with the ball end of the 5/64”...
  • Page 10 STEP 9: Angle brackets In the next step, you’ll need six of You’ll also need 6 more pieces of part #7, the steel angle brackets, part #8. the 3/8” length button socket cap screws. Pro-tip: You may want to test-thread one of the steel screws into each side of each angle bracket, using the hex wrench.
  • Page 11 STEP 10: Adding tailstock angle brackets Each bracket is held in place by a screw from the other side. Tighten the screws only just enough to hold them in place. Add the six angle brackets to the tailstock. They sit within the six rectangular outlines. Once the brackets are all in place, stand the assembly up on end.
  • Page 12 STEP 11: Adding headstock angle brackets Using the same procedure as for the tailstock, use six more screws to add six angle brackets to the headstock. As before, the angle brackets go in the outlined locations. Again, put the angle brackets in loosely at first and only tighten them once they’re held flat.
  • Page 13 STEP 12: Plunger Parts Part #9 is the 1/4” steel dowel pin. We’ll need this in the next few steps, plus the other parts shown here: #15, tailstock draw knob for 1/4” shaft #11, the steel spring. (There is another, stronger spring for optional use as well.
  • Page 14 STEP 13: Add the coupler to the dowel pin Add the 1/4” precision coupler to the end (either end) of the dowel pin. You may need to loosen the screw for the shaft collar inside, but it should fit easily and sit flush against the wooden back of the coupler.
  • Page 15 Put one of the 5/16” nylon spacers STEP 14: Installing the Plunger on the end of the dowel pin, followed by the o-ring. Fingertip pressure can guide the o-ring on. Push the dowel pin through the The O-ring captures this “plunger” and bushing in the inner tailstock so that a prevents it from falling out accidentally.
  • Page 16 STEP 15: Installing the Plunger (continued) Push the plunger against the spring to fully engage the plunger. Gently release it, and the o-ring will keep it from coming out. The tailstock assembly is now complete Install the tailstock drawknob on the other end of the dowel pin using the 3/32”...
  • Page 17 STEP 16: The EBB and its mounting hardware Next, we’re going to mount the EggBot control circuit board. This is the EiBotBoard, aka EggBotBoard, aka EBB, and #16 on your BOM. (This circuit board may be either red or white.) You’ll also need a phillips head screwdriver and..
  • Page 18 STEP 17: Where we mount the EBB The EBB has mounting holes on its four corners. The EBB will be mounted To mount it, we’re going to put those four long & in this location, oriented phillips head screws in the locations shown below. as it’s shown below.
  • Page 19 STEP 18: Adding the EBB, part I Align the EBB on the headstock and position the screw tips so that they’re resting in the Put the washers onto the phillips head screws and pilot holes. then put the screws through the mounting holes in the corners of the EBB.
  • Page 20 STEP 19: Adding the EBB, part II EBB installation complete! [Ostrich EggBot Kit Assembly Guide]...

  • Page 21: Step 20: Stepper Motors

    STEP 20: Stepper motors Spiral wrap tubing for keeping your wires neat and tidy. (Part #21 on the BOM.) It’s a bipolar stepper motor! (Part #20 on the BOM.) [Ostrich EggBot Kit Assembly Guide]...
  • Page 22 STEP 21: Wrapping the stepper motor wires Twist the spiral wrap tubing to open up a bit. Take that opening, and wrap it around the wires from the motor. Continue wrapping the spiral down, and try to position one end of the spiral wrap tubing close to the body of the motor.
  • Page 23 STEP 22: Installing Motor 2, the “Egg Motor” Test fit the motor in place. It sits above the EBB on the headstock, with its shaft poking through and its wires (for the moment) hanging down over the EBB. The motor is held in by four M3 (metric) screws (part #22), the black metal screws in the kit.
  • Page 24 STEP 23: Installing Motor 1, the “Pen Motor” Motor 1, the “pen motor” attaches to the chassis side wall. As before, test-fit the motor in place. This time, you’ll also use part #23, nylon washers, to make motor height adjustment easier. Place the washers on the black M3 screws before installing them to fix it in place.
  • Page 25 STEP 24: Attach the Headstock to the Chassis Part, #23 and #24 (6-32 x 1/2” brass thumbscrews Part #23 is the same plastic washer used for the pen motor screws. Part #24 is a brass and nylon washers) thumbscrew. These fit through the long slots in the chassis side walls and thread into the angle brackets on the headstock.
  • Page 26 STEP 25: Attach the Tailstock to the Chassis Use six more of the thumbscrew and washer pairs to attach the tailstock as shown. [Ostrich EggBot Kit Assembly Guide]...
  • Page 27 STEP 26: The other Egg Coupler Next we need #25, (the precision egg coupler for the 5 mm shaft) and the 3/32” wrench. Slide the collar into place so that the end of the motor shaft just touches the back of the abrasive pad. Orient the screw so that it will tighten down onto the flat face of the motor shaft.
  • Page 28 STEP 27: The Distal Pen Arm Parts The parts shown here will be used in the next few steps, as we build up the distal pen arm. #7, 3/8” stainless button socket cap screw (1) Gather them up, and let’s get going! #8, Angle bracket (1) #26, the distal pen arm (1) #27, the pen arm hinge clamp (1)
  • Page 29 STEP 28: Adding the pen arm hinge flexure hinge In this step we attach the hinge and washer to the distal pen arm. (The clamp is just along for the ride.) Place the flexure hinge as shown, with the Orient the distal pen arm and clamp as shown. holes lined up to those on the distal pen arm.
  • Page 30 STEP 29: Add the Pen Arm Hinge Clamp Then, place the free end of the flexure hinge over that screw end as shown. Feed one of the 3/8” stainless screws (#7) from the bottom side of the pen arm hinge clamp. Add the angle bracket on top of the hinge and screw it tightly into Finally, loosely thread the nylon thumbscrew...
  • Page 31 STEP 30: A look at what’s to come. Here’s what the pen arm will look like after a few more steps. The upper part with the hinge is already done. In the next couple of steps, we’ll prep the servo motor (part #32) so that we can add it and finish this assembly.
  • Page 32 STEP 31: The servo motor, initial setup The servo motor comes in a small bag of accessories... We’ll only need these parts; set the others aside. Take this piece, the servo horn, and push it onto the servo motor shaft. (Do not screw it in place; its position is not final yet.) [Ostrich EggBot Kit Assembly Guide]...
  • Page 33 STEP 32: Find the Servo’s Center The total range is about half of a turn. Gently turn the motor by the servo horn until it reaches its stops. First one way, then the other way. Once you know where center is, point the servo horn in that direction.
  • Page 34 STEP 33: Final installation of servo horn Now that the servo shaft is centered, we need to place the servo Press the servo horn onto the shaft horn at the correct angle. Orient the servo horn as shown: the horn points in the same direction as the cable. Use the small screw from the servo bag to fix the servo horn in place.
  • Page 35 STEP 34: Install the Servo Motor Hold the servo motor down and flush against the side against the servo mount (part #33) as shown here, such that there is no gap between them. From the set of servo accessories, take one of the two remaining (larger size) screws, and use it to screw the servo motor down into the wood of the proximal pen arm.
  • Page 36 STEP 35: Adding the Proximal pen arm You can hold the screw in place with a fingertip while threading the standoffs on, just like we did for the standoffs on the tailstock. Use two more 3/8” stainless screw (#7) to attach the two 3/4” standoffs (#34) to the two bottom holes in the servo mount.
  • Page 37 STEP 36: Adding the Distal pen arm Use another 3/8” stainless screw (#7) to attach the pen arm assembly with the hinge to the proximal pen arm. Tighten it in place with the 5/64” hex wrench.
  • Page 38 STEP 37: Adding the Pen Arm Backer Part #36 is the large brass thumbscrew, and #37 is the #10 nylon washer Using the large brass thumbscrew with its larger washer, attach the pen arm backer (part #38) to the proximal pen arm.
  • Page 39 STEP 38: Installing the pen arm The pen arm goes on the “pen motor,” Motor 1. Test-fit the pen arm in place over the shaft. The depth on the shaft is As before, note that one side of the motor shaft adjustable, so that you can line up the pen holder with the egg axis.
  • Page 40 STEP 39: Wiring the Stepper Motors The four wires from Motor 1 (the pen motor) go to the area labeled “Motor 1” on the EBB. Individually insert the four wires into the terminal block and screw them down. The wire order is: grey (or brown), green, yellow, pink, bottom to top.
  • Page 41 STEP 40: Servo Motor Wiring Next you’ll need #39, the servo extension cable. Identify the larger end and align the black wire on the extension cable with the brown wire on the servo cable. To keep the servo cable out of the way, you may want to route it around the standoffs on the pen arm.
  • Page 42 STEP 41: Connectivity Hook up the power supply and USB cable. A hint to avoid future frustration: The EBB will power on and respond to computer commands while only the USB cable is plugged in, but the motors will not move unless the 9V supply is plugged in as well. [Ostrich EggBot Kit Assembly Guide]...
  • Page 43 STEP 42: Adding a pen Use either the nylon or brass A black pen is included with your kit. thumbscrew in the distal pen arm to Additional colors are available at office mount a pen in the EggBot. supply and art stores. #40, the pen The standard pen holder fits popular fine point markers like the ultra fine point Sharpie, Copic...
  • Page 44 - FIN - w00t! Your EggBot is now assembled, so this concludes the basic assembly instructions for the Ostrich EggBot Kit. You should have a few pieces left over, including: A large rubber washer, which can be used with the egg couplers to hold smooth objects in place.
  • Page 45 Appendix A: EggBot Anatomy Flexure hinge Pen arm Flexure hinge washer hinge clamp Pen Arm (distal) Pen lift motor Servo mount Pen Arm (servo motor) Tailstock Pen holder Pen motor thumbscrew aka Motor 1 Servo Nylon extension cable Angle Bushings (2) brackets (12) Tension indicating O-ring, around...