Vibration reduction for head gimbal assembly testing
View Patent ↗An assembly for testing a head gimbal assembly (HGA) comprises a support platform configured to hold a base plate of the HGA. A base plate of the HGA is mounted on the support platform. The assembly further comprises a channel with an opening adjacent to a tail of the HGA and a vacuum source connected the channel. The vacuum source creates a negative pressure in the channel to secure the tail of the HGA to the opening of the channel. Embodiments of the invention may be useful to inhibit vibration in the tail of an HGA, which may also reduce vibration in the head of the HGA. Reducing vibration in the head of the HGA may increase the accuracy and precision of tests performed on the HGA using the assembly.
1. An assembly for testing a head gimbal assembly (HGA) comprising:
a support platform configured to hold a base plate of the HGA;
a rotatable test disc; and
a HGA tail control device configured to constrain a tail of the HGA, the HGA tail control device including a flange that shields the tail of the HGA from air currents due to rotation of the rotatable test disc.
2. The assembly of claim 1 , wherein the HGA tail control device comprises a static dissipative material.
3. The assembly of claim 1 , wherein the HGA tail control devices include a first component and a second component, the tail of the HGA being constrained between the first and second components.
4. The assembly of claim 3 , wherein the first component is a tester arm that includes the support platform, and wherein the second component includes the flange.
5. The assembly of claim 3 , wherein the tail is pinched between the first component and the second component.
6. The assembly of claim 3 , wherein the second component is a substantially flat plate that includes the flange.
7. The assembly of claim 3 , wherein the second component includes the flange, and further includes a groove sized to hold the tail.
8. The assembly of claim 3 , further comprising a spacer between the first component and the second component.
9. The assembly of claim 8 , wherein a thickness of the spacer is greater than a thickness of the tail.
10. A test assembly for a head gimbal assembly (HGA), the assembly comprising:
a load arm;
a planar mounting surface at a distal end of the load arm, wherein the mounting surface comprises an arrangement of alignment pins; and
an HGA tail control device fixed relative to a medial region of the load arm, wherein the tail control device comprises a substantially flat plate mounted in a plane generally parallel to a plane of the mounting surface, wherein the plate comprises a surface adjacent to the load arm, and wherein the surface comprises at least one flange extending downward toward the control arm and generally normal to the plane of the hat plate.
11. The test assembly of claim 10 , wherein the HGA tail control device comprises:
a first flange on a first side of the flat plate;
a second flange on a second side of the fiat plate opposite the first side; and
a central flange between the first flange and the second flange;
wherein the first flange and the central flange form a first groove adjacent the load arm and the second flange and the central flange form a second groove adjacent the load arm.
12. The test assembly of claim 10 , further comprising a spacer plate between the load arm and the HGA tail control device.
13. The test assembly of claim 10 , further comprising a rotatable test disc adjacent to the planar mounting surface.