A customer in India placed an order for two LE-4022 shakers in a multi-shaker system to replace their existing shakers from a competitor. Data Physics shakers would have to fit into the existing location to mate with the slip table. A typical customer witness test involves a re-run of our internal standard factory acceptance test or FAT. The customer was concerned with functional aspects as well as the dimensions of the mounting and location on shaker body and trunnions. Data Physics implemented the following solution:
A body connection was used to couple the shakers during the horizontal push-push operation to prevent the difference in isolation stiffness from causing any phase difference. Another critical component was the shaker fixing/tie-down holes’ locations as they had to fit the existing floor pattern. It was prudent to offer slotted holes where possible to help align the shaker.
In the vertical operation, the dual shaker system pushes a large head expander spanning the width of the two shakers at 1270 mm x 950 mm deep. The head expander is suspended in a frame on pneumatic bellows which support the weight of the test load and the head expander. Sixteen more bellows are used to suspend the frame on the shaker trunnions. These bellows also hold the shaker weight as the Lin-E-Air is devoid of any air supply during vertical operations. The hole locations for the frame to couple with the shaker body meant that Data Physics’ standard de-gaussing coil could not be used. The diameter of the coil had to be reduced to tie the frame to the shaker body. As is evident, multiple holes were to be located to accommodate the frame and the bellows.
The customer and Data Physics spent a significant amount of time verifying:
- Length of the shakers: To ensure that shakers will fit in existing hole locations
- Width of the shakers: To ensure that shakers will fit in existing hole locations
- Concurrence of shaker center-line and frame center-line: To ensure that the armature lines up with the slip table
- Distance from the shaker trunnion axis to armature insert top: To ensure that the armature lines up with slip table and head expander
- Distance between shaker base to trunnion axis: To ensure that the armature lines up with slip table and head expander
- Distance between the shaker top plate to armature inserts: To ensure that the armature can mate with head expanders and the air bellows on the frame are not too long or short
- Distance between shaker top plate to shaker frame: To ensure that the bellows are not too long or short for the head expander and armature inserts to mate properly
- Diameter of tapped holes on shaker body: To ensure that the head expander frame can be tied to the body
- Location of holes on top of trunnions for 16 bellows: To ensure that the frame can be attached using bellows
-Sai Mullapudi, Shaker Applications Engineer