It's Alive! It's Alive!

My Rostock 3D printer is now moving. This is a video of the home positioning routine.

Some interesting facts on this part of the build:

There was no information at the time of where the steppers go (as in which axis is X, Y or Z in this design).  On standard printers this is pretty straight forward but on this not so much. I placed them as X and Y at the front and Z at the back. It all behaves as expected so either I fluked it or the little dance it does in the video works out the orientation.

Also there was no info on whether the min sensors go on the top or bottom. As it starts at the top, I put Min sensors up there. That was the wrong choice, and there was much stepper stalling and belt skipping. It took a little while to work out what was going wrong as it is not obvious in this design and many random things happen in this configuration. After swapping them around and having min sensors at the bottom, it behaves properly.

My next steps are:

• add some supports in the back corners that can be used to "pull" the axis perfectly square if required and also provide a spot to mount the electronics. The original design has the Ramps underneath but I prefer to have them where I can see them and give them better air flow.
• Get it all moving level and install the heated bed.
  
• I will also print out the pen holder today on my other printer and see if I can get it to draw something in 2D. My Teflon tubing and hot end has not yet arrived for the extruder so no test prints with plastic yet.