BEST Robotics has a number or resources that may also help you through the problems that you are seeing. The forums are a good place to look for peer and other support


Once you have identified the problem part, do not try to repair it yourself;  contact our This email address is being protected from spambots. You need JavaScript enabled to view it.(s) for replacements and/or repairs.  You can also contact the This email address is being protected from spambots. You need JavaScript enabled to view it.(s) if you've been unable to locate the problem. Please note, you must include the word "sabest" (no quotes required) in the subject line for messages that you send to kitguy; this is used to filter messages to avoid the large amount of SPAM that we get at the kitguy address.

Soldering and Crimping

Do you know how to solder?  Take a look at the Soldering and Crimping Guide for some helpful hints with your BEST soldering tasks.



Below are some helpful suggestions and links to resources for the Cortex

  • Split the motors between outputs 1-5 and 6-10 to avoid internal fuse problems
  • Connect only one motor to each of the speed control channels (1 and 10).  Connecting two motors to a single channel may cause problems.
  • The keyed edge of servo connector (white wire) goes towards center of Cortex.
  • Leave the battery adapter installed; disconnect at the powerpole connector.
  • Connect the 9V backup battery to avoid losing the synch with the Joystick and/or programming when the main battery voltage gets too low. Turning the unit off under good main battery conditions does not cause a loss of synch or programming.
  • User's Guide
  • Quickstart Guide
  • Solidworks Model 


Tips for using the Joystick

  • Batteries should last about 2 hours.
  • Don’t let the batteries get too low, or you may have to re-synch the Cortex & Joystick
  • Joystick can be left off when tethered to Cortex using the USB A-A cable.
  • If things get too messed up, press and hold the “config” button until the LEDs flash, then turn off the Joystick. Connect it to the Cortex using the USB A-A cable, then turn on the Cortex (only) and wait for the units to re-synch.
  • User's Guide
  • Joystick Calibration Procedure


Your robot normally relies heavily on the motors working properly. To help them continue to work properly, please pay attention to the following items:

  • Use the connectors supplied in the consumable kit with the motor; please don’t solder to the leads.
  • Mount the motor using 8-32 screws that install on the face of the motor. Be careful of the insertion depth; the maximum depth is roughly 1/8" for the small motor, and roughly 1/4" for the large motor.
  • Since the motor is not sealed, keep the motor away from any metal shavings or other debris.
  • Do not glue anything to the shaft.  You have been provided with wheel hubs, and other components that can be attached to the motor shaft without glue. Custom components mounted to the shaft can use a set-screw to the motor flat to provide a good interface.
  • Use the motor mounts provided and use the short screws with those motor mounts to avoid damaging the gearhead.
  • Small motor Specifications
  • Large motor Specifications
  • Small motor SolidWorks Model (step) - right click and save file
  • Large motor SolidWorks Model (step) - right click and save file

The speed controllers are quite simple, but please know the following

  • Connect only one motor per speed controller.
  • Note the polarity on the connector when plugging it into the Cortex.
  • Do not disconnect the terminal adapter.
  • Instructions