Components change as improvements are made
and new ideas are incorporated.
The Computer (not included in set), can be either a PC running
Windows XP,7,8 or a Linux PC
running version 2.6 or later.
Storage/Transport Case is a rugged multi-compartment
The Manuals and Tutorials are now on
this website and may be reprinted freely. Printed manuals are no longer
included with the set.
Quick Reference Card has drawings of assembled joints on one side, and
script/edit/run programming details on the other.
Rascal Software 1.1.0 for Win 2000/XP/Vista and PC-Linux 2.6 or later. The CD includes 40
minutes of Video. The first 10 minutes showing 11 sample Rascal projects in
action. Next comes a 30 minute step-by-step narrated video showing an arm being
assembled and programmed..
Power Supply (6V 5A universal input switcher) runs the Usbor
servo controller and the servos.
Usbor servo controller connects to your PC USB port using
the supplied cable and runs up to 32 servos (the Rascal set comes with 6) under
software control. The Usbor also has a 32 channels of 8 bit A/D.
USB Cable, 6' (1.8 m) with molded plugs.
The Servos used in the Robix Rascal
This is a "standard" size hobby servo, the Hitec HS422 widely available
at commodity prices. It has a nominal torque of 40 oz-inches (2.9 Kg-cm). The
longest dimension is 1.6" (42 mm). The usual mounting ears found on standard
servos have been removed so that successive robot joints may be close together.
In the Rascal set we have also extented the nominal 10" (25cm) servo cable to
approximately 46" (117cm).
The top housing has now been removed to show the nylon gears. The ratio
is 100:1. The inner half of an iron-oilite bearing is shown on the output
shaft. The shaft has a total of 180 degrees rotation, and is coupled on its
underside to a potentiometer which serves as the positional encoder of the
Removing the bottom cover of the servo shows the electronics: integrated
signal decoder and motor driver on circuit board at front; positional encoder
(potentiometer) at upper left, and the drive motor itself at upper right.
8 Sets of Custom Servo-to-Link Mating Parts let the robot
builder connect the servo output shaft to the Rascal links by tightening only a
11 Servo Clamps secure servos to links and also to the Bread
Board Base in a variety of configurations.
Spiral Cable Wraps and twist ties allow easy "dressing" of servo
wires along your robot's body.
The Robix Rascal Links
If servos are the "muscles" of the robots, then the links are the
(A) The kit includes 18 links in all: 4 each of 2-, 3-, and 4-hole
links, and 3 each of 5- and 6-hole links. Constructions require only about 7 to
10 links at a time, but the full 18-piece set (for than 4' (1.3 m) total length
gives great flexibility in designing and proportioning your robots.
The links are made of hardened 6061-T6 structural grade aluminum alloy,
which is precision-formed before hardening with our custom die. The links are
then clear-anodized for durability and appearance.
(B) The Diagonal Link has several other parts mounted to it so that it
can function as a load-bearing and damping member in arm-like constructions
using the Arm Base.
Gripper Assembly mates easily with two servos, one to open and
close the fingers, and a second servo which acts as the gripper's "wrist". If,
for example, your project is an arm with a wrist and gripper, you will have the
remain 4 servos for the other arm motions. Remember, though, that not all arms
need grippers, and not all robots are arms!
The gripper can accomodate objects up to about .9" (~23 mm).
Pivot Post Base with pivot post and fasteners is used
with the diagonal link for most arm-like constructions. This Base is now a
single "wing" of machined, plated and powder-coated steel supported by low
rubber feet. This Base with attached pivot post assembly (tools included), is used in the
Chemist, Golfer, Coffee, and Bubbler projects.
Bread Board Base is used for "generic" constructions. Servo
clamps allow quick, flexible attachment of servos to this base. This base, for
example, is used in the Fingers,
Thrower, Dancer, and 3legs projects.
Glides for walker projects such as 3legs. The parts are on top of the Bread
Board Base in the picture for visibility.
Rubber Bands for constructions such as Fingers. The bands stretch onto links to
provide gripping surfaces.
Manipulanda for robot construction, including small wooden balls
and plastic "tees" for pick-and-place demonstrations. The table tennis ball is
used for throwing or hitting by models, and the spoon is used in Thrower and also just as a spoon in Coffee.
Tools that are needed come with the set: A hex key and a
phillips #0 screwdrivers. Other fasteners such as plastic wing-nuts may be
Safety Goggles, which fit over glasses.
Generic "Caution" Tape of yellow and black diagonal stripes for marking a "do not enter"
area around robot projects.
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