Impact Testing Device - Nightforce Optics

Designing and creating a riflescope impact Testing Device for Nightforce optics

Background
Each and every Nightforce riflescope is currently impacted as it goes through the production line. This is currently accomplished by impacting the riflescope manually by hand against a padded steel pedestal in multiple orientations. After impact the riflescope is checked to make sure nothing internally has shifted. Each person on the production line impacts their own riflescopes which leaves the probability of inconsistencies while testing

Design Goal
Design and build a proof of concept, impact testing device than can consistently deliver a calibrated impact at required orientations to a riflescope.

Underlying equations
The Work-Energy Principle states that the change in the kinetic energy of an object is equal to the net work done on the object. since the impacting device will come to a complete stop, the change in its kinetic energy is equal to the initial Kinetic energy.(Average impact force) x (distance traveled) = (change in kinetic energy)for a linear system F*d=1/2 m*v^2 and for a rotational system F*d=1/2 I*ω^2. from these equations we can then estimate the impact force and acceleration felt by the scope

Testing
To find the linear velocity of a Pneumatic actuator, we placed the actuator on a known grid and knowing the cameras frame rate (120fps) we can solve for velocity. This specific actuator at 120psi moves at 80 in/sec

Meeting Minutes

 * [[Media:2015_ImpactTestingDevice_MM9-10-15.pdf| September 10th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM9-14-15.pdf| September 14th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM9-17-15.pdf| September 17th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM9-25-15.pdf| September 25th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-1-15.pdf| October 1st 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-8-15.pdf| October 8th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-15-15.pdf| October 15th 2015 ]]
 * [[Media:2015_ImpactTestingDevice_MM10-22-15.pdf| October 22nd 2015 ]]