Tag Archives: pen plotter

Modifying Marlin Firmware to work with a TandemB

In previous posts I built a prototype ‘TandemB’  which can be thought of as a 2D Delta printer in terms of its x and y-axis movement. This prototype could be moved about under its own power but that had no compatible firmware … Continue reading

Posted in Tandem | Tagged , , , , , , , , , | 3 Comments

One step conversion of an image to gcode for Makerbot Unicorn and Reprap style 3D Printers

How to take an image like this: and in one step generate the gcodes required to do this: All credit for cad.py goes to the original creator Neil Gershenfeld of  MIT Center for Bits and Atoms and David Carr of Make Your Bot who optimised the … Continue reading

Posted in A Reprap Project | Tagged , , , , , , , , , | 5 Comments

DIY Dual H-Bridge to control a Pen Plotter

In my previous post I pulled apart an old pen plotter revealing it to be controlled by two brushed DC motors.  In order to power each DC motor a H-bridge was required but I had none on hand. However it turns out a H … Continue reading

Posted in A Reprap Project | Tagged , , , | Leave a comment

Old-school Scientific Pen Plotter Teardown

I recently acquired an old Rikadenki pen plotter from a lab I work in and have decided to pull it apart to investigate how it works. It turns out to be quite unlike any of the Cartesian bots currently used by the DIY community. The pen … Continue reading

Posted in A Reprap Project | Tagged , , , , , , | 5 Comments