This post should detail some of the most stumbling blocks in building and using any of the LittleBots.
Bluetooth or USB not connecting
With the LittleArm Big, and all of our robots, the Bluetooth and the USB cord cannot be connected simultaneously. Since they both use the Serial port of the Arduino their signals effectively cancel each other. If you wish to control the arm with Bluetooth ensure that it is not connected via USB and vice versa.
Driver Issue with Arduino
The Atmega chips used in all of our robots are Arduino Clones, as such a certain driver error can arise when attempting to flash them using the Arduino IDE, if it is not appropriately updated. This is easily remedied by following this instructable about adding the necessary drivers to your computer.
3D printing can occasionally leave a little residue behind. This can sometimes be due to poor retraction, or intentional in order to gain something somewhere else in the design. This residue can sometime block or impede insertion of components. If you find/print a piece with this slight defect simply use some needle-nosed pliers, a razor, or a small file to pluck or smooth out the problem. This is a very minor side effect and is easy to remedy.
3D Printing the Arm
All 3D printed parts for the LittleBots are designed to be Sliced with CURA. Using other softwares can sometimes result in incorrect slicing of the parts. While we work to make sure that our files are compatible with all 3D printing slicers we do not always succeed and are constantly updating the files to extend their compatibility.
One last consideration. We designed the LittleBots to be printed with our printers. That is the only reference that we have. Since many of the kits are "snap together" tolerances are fairly tight for 3D printing. Many desktop 3D printers are not tuned or maintained well enough to hit our tolerances. Generally this can be fixed by scaling parts to 101% of their original size. This typically increases the margins enough for servos to slide into to lower-tolerance slots, without causing other assembly difficulties.
If you have trouble with one of your LittleBots please let us know and we will work to help you as much as possible.
Here is the wiring diagram for the servos of the LittleArm Big Arduino Robot kit. Here is the link to full assembly instructions.
Here is the LittleArm Big arduino code that corresponds to these connections.
Here is a diagram showing the connection locations for all of the components and expansions for the Littlebot 3d printed arduino robot.
In this post is all the software for the Littlearm Big arduino desktop robot arm. The Python File, Arduino Sketch, Android Application and Compiled Windows Application. All software is functional but still in beta. Please let us know if there are any problems.
Please note the speech recognition capabilities of the software are limited by the speed of your internet connection. Also, during compilation of the Windows file the speech capabilities seemed to be limited in some way. We are searching for the bug. But the general control and recording are perfectly alright to use. Enjoy your Littlearm Big
We just wanted to announce that we will be at the Bay Area Maker Faire this week with all of the 3D printed Littlebots and Littlearms. Come on by and see what we have been working on. We are very excited to be a part of Maker Faire for the first time this year.
See you all there.
We are super excited to announce the launch of the Littlebot on Kickstarter and Indiegogo. Littlebot is our first mobile robot kit in the Family of Little Robots.
He has been designed as a toy, that kids can just play with, but when they get bored of that they can dig into him and actually learn how he works. We want kids to figure out how to create technology not just consumer it.
Let us know what you think.
Here are the beta app and basic Arduino software for the LittleBot. Final Versions will be released after our Kickstarter campaign.
We wanted to just let you know that we are going to be releasing another new robot in May 2017. He is called the LittleBot. He is meant to be the mobile part of the family. More details coming soon, but he will be based highly off of what we have done with the LittleArms.
-The Team at Slant
We recently shipped the LittleArm Waldos out to many of our kickstarter backers. Since it is out there, we thought that it would behoove us to do a quick post about potential stumbling blocks to users of the waldo. Since most who ordered the waldo are skilled hobbyists, we will quickly detail tweaks and solutions to the Waldo should you need to troubleshoot it.
Those are the main things that might come up. Hope this helps. Enjoy your Waldo.
Here is the wiring diagram for the LittleArm SensorCube. You may download 3D printing files from the downloads page.