The pipe sail Compass - Measuring tool used to indicate the placement of the next bag

As a builder is placing super adobe bags in the shape of a circle a compass is needed to indicate where the next bag placement has to be. 

Base holder: 

Is the fixing point of the pipe compass to the ground. The holder needs to be strong to with stand the rough use of the compass throughout the build process + the wind loads on the site + the rotation/lateral sliding of the moving post. Different base holder designs will be tested with active forces imposed on it - in the coming week to find the most appropriate/cost effective solution.

Moving Post:  

This is the horizontal member which is moved to get the next bag placement location. this element can be rotated along the vertical post axis and it can moved laterally to get the desired measure for the bag placement. 

Vertical Post:

It is the fixed member of the compass - fixed firmly to the ground. This gives the height of the built and the support for the moving post. 

Joint: 

Is the element which is moved along the axis of the vertical post and it holds the moving post. It enables the moving post to move laterally in order to indicate the placement of the next super adobe bag. The joint has a LCD display which shows the measure and two buttons which can be used to reset and start the measurement. The moving post is moved laterally to get the correct measurement on the display.  

Pipe compass - movement

This GIF displays the lateral movement through the joint to indicate the placement of the next bag. 

This GIF shows the detail of the joint. As the MP slides through the join the movement is measured and displayed on the LCD screen. The two buttons on the joint are used to reset and start measuring. 

Legend 

Moving post: MP

Vertical post: VP 

Base holder: BH