ERC Timsav redesign

This is basically a complete re-design of the ERC Timsav. This uses the same rails as Edward's original design, and the same build process. You can assemble this with his original videos. This requires a working knowledge of the original design. Changes I have made:

-One piece gear drive head
-Turn head 90 degrees
-Added mounting flanges to the left and right plates
-Added ability to mount Arduino to either side of right plate
-Added plate to mount Arduino to X plate (servo wires don't have to move then)
-Added a fourth roller to the X plate

This uses a 9 gram servo - either a plastic or metal gear. Use a small cut-off piece of a servo arm pressed into the gear to make a positive drive.

This is a V slot style head. You may have to sand the head to get it to fit properly.

This requires a longer needle. I highly recommend the printed needle holder found in the ERC Timsav facebook group.

Note that the attached pic includes an experimental aluminum plate for the wel