Test Arm Build to Simulate Functionality of Exo Arm

Test Arm Build to Simulate Functionality of Exo Arm

Date: 2.20.17
Location: Logan HS
Goal: Build a small test platform for the Exo Arm to begin simulating functionality.

A test arm platform and support structure was fabricated to begin testing the articulation of the joints for the prototype Exo Arm. The staff at Fastenal found some smaller rod ends and yokes with clevis pins to begin attaching the joints. We hope to take these parts and begin experimenting to determine balance, arm reach, joint movement, live and dead loads, etc... We need to determine if an additional linear actuator needs to be added to support the grinder or if springs will work just as well.

The test platform is welded together with tube stock and a threaded rod to attach the rod ends. We also attached a counter balance to test and see if this would be an effective method to stabilize the arm. The support legs are cut and welded at 30 degree angles. We are not sure if this will need to be changed or if additional supports need to be added. The entire platform for the full size prototype will be on wheels in the end.

Sketch of Exo Arm Joints 2.16.17

Support test platform for Exo Arm. Notice the threaded rod with rod end attached.

Different view of support test platform for Exo Arm.