Suggestions Requested for Impact Test
Suggestions Requested for Impact Test
(OP)
I am designing a machine and have a need to analyise how the mechanism inside is operating.
Specifically, there is a small spring loaded lever that is inside the machine. The lever is unlatched by another lever and the spring loaded lever moves under the power of the spring to strike another part.
I want to measure the time it takes the lever to strike the part from the time it becomes unlatched. This time varies from 1 ms to 20 ms.
I can't see or get to the part when the machine is together.....I want to mount something on the outside of the machine to tell when the part is unlatched and then when it strikes.
How would you approach this problem? I would welcome any and all comments.
Cheers,
Specifically, there is a small spring loaded lever that is inside the machine. The lever is unlatched by another lever and the spring loaded lever moves under the power of the spring to strike another part.
I want to measure the time it takes the lever to strike the part from the time it becomes unlatched. This time varies from 1 ms to 20 ms.
I can't see or get to the part when the machine is together.....I want to mount something on the outside of the machine to tell when the part is unlatched and then when it strikes.
How would you approach this problem? I would welcome any and all comments.
Cheers,





RE: Suggestions Requested for Impact Test
FWIW a decent mechanisms model could probably model it reasonably well, and would be easier to study.
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Suggestions Requested for Impact Test
Thanks for the reply. I was thinking too of accelerometers. Let's say I went this route....could anyone make specific equipment recommendations that might not break the bank?
Cheers,
Bill
RE: Suggestions Requested for Impact Test
Guessing that your mechanism is pretty small, I'd suggest an Endevco 222C as it is the smallest accelerometer I know of, and it has good high frequency response. Against that it is not very sensitive. Bruel and Kjaer make some small accelerometers that are reasonably sensitive, but nothing as small as the 222
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Suggestions Requested for Impact Test
Maui
Constants aren't; variables won't.