Difference between revisions of "Precision Pendulum Assembly"
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==Order of assembly== | ==Order of assembly== | ||
| − | Although | + | Although not critical is recommended to follow this recommendation list in order to proper assembly the structure. This list only refer to the main points that shall not be neglected and highlight the most leave-out aspects: |
#Assemble the main structure according to the following instructions, filling up the tubes with small grained sand ''but'' only to 2/3 of their height after being tight to avoid sand leakage. Conversely it can be taped in the interior. | #Assemble the main structure according to the following instructions, filling up the tubes with small grained sand ''but'' only to 2/3 of their height after being tight to avoid sand leakage. Conversely it can be taped in the interior. | ||
#Keep the screws loose (only hand tight) during the alignment; only after setting up the complete structure and proper calibration they should be tighten. | #Keep the screws loose (only hand tight) during the alignment; only after setting up the complete structure and proper calibration they should be tighten. | ||
#During cable measurements take the fulcrum out of the rail (cable off-centered) in order to measure the exact length by having it on the parallax plane. | #During cable measurements take the fulcrum out of the rail (cable off-centered) in order to measure the exact length by having it on the parallax plane. | ||
| − | #Excite the pendulum to define the exact plane of natural oscillation and use the screw nuts | + | #Excite the pendulum by hand very gently to define the exact plane of natural oscillation and use the screw nuts on the launcher to adjust its direction; before doing it have a flashlight and paper screen to perfect align the oscillation plane. |
| + | # Use the command "laser on" to align the laser; the laser can be focused by rotation the case if the beam became quite divergent. | ||
| + | |||
| + | #To do the calibration of the shovel movement, use a long displacement such as 300mm to 400mm to reduce systematic errors. Issue in sequence the commands "go to origin 5 5" to read zero reference, "move forward 40 2 2" to slowly move the shovel and take note for the vertical position and maximum position. This 4 values are of extreme importance to calibrate the experiments | ||
==Contents== | ==Contents== | ||
Revision as of 19:03, 12 February 2020
THIS PAGE IS STILL WORK IN PROGRESS
This page is intended to serve as the assembly instructions for the Precision Pendulum, particularly following the setup developed for the WPA project. This page starts with a brief description of the apparatus and its core components. Then it is followed by the description of the assembly process which is divided into three core parts: the mechanical assembly, the electronic controller assembly and the setup calibration. An additional step is described for those who want to allow "non-remote" operation (ie: local operation in a museum or common area with public access).
Order of assembly
Although not critical is recommended to follow this recommendation list in order to proper assembly the structure. This list only refer to the main points that shall not be neglected and highlight the most leave-out aspects:
- Assemble the main structure according to the following instructions, filling up the tubes with small grained sand but only to 2/3 of their height after being tight to avoid sand leakage. Conversely it can be taped in the interior.
- Keep the screws loose (only hand tight) during the alignment; only after setting up the complete structure and proper calibration they should be tighten.
- During cable measurements take the fulcrum out of the rail (cable off-centered) in order to measure the exact length by having it on the parallax plane.
- Excite the pendulum by hand very gently to define the exact plane of natural oscillation and use the screw nuts on the launcher to adjust its direction; before doing it have a flashlight and paper screen to perfect align the oscillation plane.
- Use the command "laser on" to align the laser; the laser can be focused by rotation the case if the beam became quite divergent.
- To do the calibration of the shovel movement, use a long displacement such as 300mm to 400mm to reduce systematic errors. Issue in sequence the commands "go to origin 5 5" to read zero reference, "move forward 40 2 2" to slowly move the shovel and take note for the vertical position and maximum position. This 4 values are of extreme importance to calibrate the experiments
