dr4wbck

The Idea

Initialy our Idea was to build the AxiDraw but with a Capsten-Drive and in Core-XY style to not need to have a typical belt and only need a rope or fishing line (and we wanted to try out this cool new technic :D).
For this, we took big inspiration from the UrumbotXY 2.0 and first tried to imagine, how we need to align the bearings to get the desired movement.
We made some initial sketches to better understand, how the machine whould look like and what parts we needed.

Then we seperated the machine in different parts that needed to be designed and to be done. Also here you can see the inital concept, which was that the corner-bearings are placed on the middle carrier and the rope is fixed on the head. (and also here we planed to place the carrier bearings over the second axis)

We where a bit overwhelmed of all the tasks that needed to be done and first needed to get into managing the tasks and distribute the tasks in the team. So we split the work into thouse sub-tasks

try out and get the RAMPS working with Printrun
design the different parts of the x and y machine axis
design a head for the pen with z axis
produce and test the prototypes and needed parts

Initial Design

In the initial design, we kept the design simple so we could produce them fast and test out the mechanism.

So we build a simple motor bracket for the motor and the linear rails:

Then we produced the capston and pulley from the UrumbotXY 2.0:

An Initial head for:

Then for the carriage we had a Metall Carriage already as a part, which was very sturdy. Here we needed to be carefull with the screws. But the wheels for the second axis where on top of the other wheels, which we couldn't implement and Ferdi advised against it.

The tail was designed with only one wheel, which may have bin one cause for our problem.

Then we redesigned it to use both metall carriage, which was pretty sturdy.

First Assembly

Continuation & Redesign

Lessons Learned

distributing the work in a team is hard
- also finding parts, that can be operated on parallel is not that easy
nothings works out as expected and things that can go wrong, will go wrong (as told so before)