Print With Four Extruders Simultaneously on this Polar-type Theta Printer #3DThursday #3DPrinting
One of the more fascinating and eccentric mechanical approaches to desktop 3D printer design designs around polar rather than Cartesian coordinates. And while a number of projects in this direction have been attempted, this polar bot designed by Tyler Anderson over the past few years — the Theta — is in a working prototype state over on Hackaday Projects! Check out the overview below, and then visit the project page to learn more about how it functions and a detailed development history.
The Theta Printer is a platform for printing with as many different materials as possible. Whether it be different colors of plastic, wood, carbon fiber, chocolate, or anything else you can make an extruder for. Each extruder moves simultaneously and independently, allowing the printer to lay down 4 different materials onto the same object at the same time.
…With most 3D printers, adding more extruders makes the machine slower and reduces the build volume. The Theta Printer overcomes this by using polar coordinates. A polar printer works kind of like an old fashioned record player. Your objects are printed onto a platter which spins. The advantage is that you can have many print heads. Each extruder is on the end of an arm which swings in and out. The spinning platter is called the ϴ (“theta”) axis and the swinging arm is called the R axis. Together these replace the normal X and Y coordinates you’re used to. A polar printer has a couple of advantages over normal cartesian 3D printers.
Less moving mass means better acceleration
Finer resolution, especially near the center
Multiple toolheads without reducing build area
The spinning platform makes this machine ideal for integrating a 3D scanner. In addition, you can easily swap out an extruder for a mill or any other tool, making the Theta Printer the perfect all-in-one fabrication machine.
Every Thursday is #3dthursday here at Adafruit! The DIY 3D printing community has passion and dedication for making solid objects from digital models. Recently, we have noticed electronics projects integrated with 3D printed enclosures, brackets, and sculptures, so each Thursday we celebrate and highlight these bold pioneers!
Have you considered building a 3D project around an Arduino or other microcontroller? How about printing a bracket to mount your Raspberry Pi to the back of your HD monitor? And don’t forget the countless LED projects that are possible when you are modeling your projects in 3D!
Stop breadboarding and soldering – start making immediately! Adafruit’s Circuit Playground is jam-packed with LEDs, sensors, buttons, alligator clip pads and more. Build projects with Circuit Playground in a few minutes with the drag-and-drop MakeCode programming site, learn computer science using the CS Discoveries class on code.org, jump into CircuitPython to learn Python and hardware together, TinyGO, or even use the Arduino IDE. Circuit Playground Express is the newest and best Circuit Playground board, with support for CircuitPython, MakeCode, and Arduino. It has a powerful processor, 10 NeoPixels, mini speaker, InfraRed receive and transmit, two buttons, a switch, 14 alligator clip pads, and lots of sensors: capacitive touch, IR proximity, temperature, light, motion and sound. A whole wide world of electronics and coding is waiting for you, and it fits in the palm of your hand.