If a drive is hard-mounted to a frame or chassis, shock and vibration energy can be transmitted to the drive through its connecting points when the device is dropped or bumped. That energy can:
| |
"Hang" the drive, interrupting operation and requiring rebooting.
|
| |
Cause the actuator to crash into the head and render it inoperable.
|
Rotational vibration from the drive can cause unacceptable noise as well, necessitating a design solution before the end product can be marketed.
Hard-mounting the drive to a chassis or frame allows shock and
vibration energy to travel directly to the HDD through the attachment
points and adjacent surfaces. Using an energy-absorbent elastomer as a
"spacer," however, interrupts that direct line of transmission
and provides an efficient energy absorber.
| |
An ISODAMP® grommet or custom-molded part at each attachment
point forms a "soft" connection and interrupts the energy
path from the frame to the drive. The isolator absorbs and dissipates
the structural energy, so less is transmitted to the drive.
|
| |
Energy-absorbing pads, frames or corner bumpers put distance between the drive and its surrounding surfaces. CONFOR® CF-EG Series viscoelastic foams and highly damped ISODAMP solid elastomers, die-cut or custom-molded to mirror the drive's geometry, can be utilized.
|
| |
Damped clamps—spring metal clamps over-molded with E-A-R’s ISODAMP thermoplastic—hold the HDD tightly in place. Damped clamps can be employed when "sway space" is not available for shock isolation. They are designed to minimize shock amplification. The metal bracket smoothly slides onto the HDD, allowing the drive to be removed and installed, easily and repeatedly, without wear or abrasion to the ISODAMP material and accommodating manufacturing tolerances. The over-molded ISODAMP elastomer controls the resonance of the spring metal clamping system.
|
ISODAMP® C-1000 Series thermoplastics
| |
Exhibit high internal damping
|
| |
Provide low amplification at resonance
|
| |
Control shock in minimum sway space
|
| |
Quickly restore system equilibrium
|
| |
Three temperature-tuned formulations
|
Click here for more information
ISOLOSS® polyurethane elastomers
| |
High internal damping
|
| |
Excellent resistance to creep and compression set
|
| |
Can be metal-bonded during molding
|
| |
Broad service temperature range
|
| |
Available in flame-resistant formulation
|
Click here for more information
VersaDamp™ TPEs
| |
Provide uniform performance over a broad temperature range
|
| |
Adjustable damping
|
| |
Adjustable durometer
|
| |
Adjustable properties allow custom-tuned dynamic response
|
| |
10 standard formulations
|
Click here for more information
CONFOR® CF-EG urethane foams
| |
No metal oxides or halogens
|
| |
No silicone off-gassing
|
| |
Listed UL 94 HF-1
|
| |
Highly energy absorbent
|
| |
Rate sensitive—very low rebound
|
Click here for more information
|
