1701A+ – Obsolete
- Separate Control Box and Spinstand reduces electrical and mechanical noise.
- Embedded servo standard on all spinstands.
- Micro-positioning system with positioning repeatability of 0.5 µInches.
- Software controlled skew angle conversion without track repositioning.
- Easy conversion between head (HGA) and headstack (HSA) testing.
Guzik S-1701A+ Micro Positioning Spinstand achieves a better electrical and mechanical noise isolation compared to its predecessor S-1701A due to its separated control box and spinstand. It is equipped with a patented (US Patent: 5,382,887) closed loop positioning system consisting of a piezo substage and precision optical scales with 0.02 µInches resolution. This, combined with a patented (US Patent: 6,023,145) embedded servo system, results in track positioning repeatability of 0.5 µInches and track profile measurements with effectively zero hysteresis. This capability is a requirement in MR-Head testing and high TPI track profile and track interference analysis.
S-1701A provides software controlled skew angle adjustment through a patented (US Patents: 6,006,614 and 5,254,946) software controlled mechanical configuration. Since the head gap is located in the center of a rotational system, skew angle control is accomplished by rotating the head around the head gap. In this manner the skew angle can be changed up to ñ45ø while remaining on the same track.
The unique capability of changing skew angles while remaining on track allows the user to perform a variety of measurements, including track profile analysis on a previously written track at varying skew angles. This unique measurement can produce a comb-shaped single-track profile plot.
Through a very simple mechanical conversion, S-1701A can be used for either head (HGA) or headstack (HSA) testing.
Features
- Simultaneous and synchronous rotary and linear stage movements provide correct skew angles at all positions on the disk.
- Universal Micro Positioning Spinstand equipped for HGA, HSA, and Disk testing.
- Positioning repeatability of 0.5 µInches with optical scale resolution of 0.02 µInches.
- Software controlled skew angles of ñ45ø.
- Optional clockwise (mirror) head loader allows testing bottom heads on the top.
- Interchangeable Head Stack (HSA) fixture can be designed to custom specifications.
- Interchangeable “Z-height” adapters, HGA mounting fixtures, and spindle chucks (disk sizes from 1.0″ to 3.5″).
- Optional optical alignment system available for head gap alignment within .001 Inch to the center of the rotary system.
- Table top unit.
| Air Bearing Spindle | |
| Interchangeable Spindle Chucks: | 1.0″, 1.8″, 2.5″ and 3.5″ available |
| Motor: | Brushless DC, programmable, 100 RPM – 20,000 RPM |
| RPM Jitter: | 0.005% typical |
| Acceleration | 0 – 10,000 RPM in approximately 3.25 seconds with 3.5″ disk mounted |
| Positioning Mechanism | |
| Linear Position Repeatability (with servo option enabled): | less than 0.5 µInches |
| Local Positioning Accuracy: | ±0.4 µInch typical, ±1 µInch maximum |
| Absolute Positioning Accuracy Over the Entire Linear Travel: | ±8 µInch typical |
| (Absolute accuracy over the entire range of travel is determined by the accuracy of the linear encoders. Higher precision encoders can be provided on demand, with absolute accuracy of 4 µInch (maximum) over the entire range.) | |
| Linear Scale Resolution: | 0.02 µInches |
| Hysteresis: | Closed loop system, no hysteresis |
| Skew Angle Range: | ±45 degrees, software programmable |
| Skew Angle Resolution: | 1 minute of arc. |
| Physical | |
| Spinstand: | Control Box: |
| Size: 24″ x 12″ x 18″ | Size: 18″ x 18″ x 8″ |
| Weight: 198 lbs | Weight: 36 lbs |
| Power: 110 VAC ±15% 50/60 Hz, 3 A approximately 230 VAC ±15% 50/60 Hz, 2 A approximately |
|
Environmental
Operational: 15° C to 40° C, 90% maximum relative humidity, with no condensation.
- Signal was written on the track and the amplitude of the read signal was measured at 2.5 µInch increments across the track in both forward and backward directions. The above Track Profile Plot displays the results of this measurement. It demonstrates 0.5 µInch positioning repeatability and zero hysteresis of the Guzik S-1701A+ spinstand.
- After a band erase, 20 MHz signal was written on the track at -15° skew angle The skew angle of the head gap was changed to 15°. Track Profile at this skew angle was measured ON THE SAME TRACK at 5 µInch increments. This measurement was performed in both the forward and backward directions. The resulting comb-shaped single-track profile plot displays the amplitude interference introduced by the angle between the magnetic transitions on the track and the head gap.