Asmograf Pen Plotter

Some time ago I got a bit nostalgic about a pen plotter from 80's called [Alfigraf](https://www.atarimax.com/jindroush.atari.org/data/hardpics/alfi.jpg). It was produced in Czechoslovakia and based mainly on parts of a construction kit called Merkur (fun fact - first contact lenses were created using machine built from [Merkur](https://cs.m.wikipedia.org/wiki/Soubor:Merkur_based_apparatus_for_centrifugal_casting_of_contact_lenses_by_wichterle.jpg)). Long story short, first I built the plotter using Merkur parts and then I decided to make a design for 3D printing so I could put the Merkur parts back to the box.

Short video with the plotter in action is [here on youtube](https://youtu.be/A09QSWF1teg).

It turned out to be quite simple and compact design using only parts that are printable or they can be easily bought on ebay/aliexpress together with your local DIY shop for all the metal parts.

The steppers are NEMA17 (17HS2408) drived by TI DRV8825 and controlled by grbl running