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Quartz sorting machines
 
The cutting angle of quartz oscillators determines the temperature dependence of their frequency. The Quartz Sorting Machines enable to measure precisely these angles and to sort the blanks according to them. The Omega-Scan method including laser correction is used for the measurement of the cutting angle of the crystal surface with respect to the crystal lattice. The standard EFG machines are designed for AT-cut as well as for SC-cut quartz, which is used for special precision applications. On request, sorting machines for quartz with other cutting angles and for other crystalline materials can be delivered. Quartz blanks
 
Quartz cut AT - Cut
(Mean angle: Theta = 35.25° Phi=0° )		 SC - Cut
(m.a.: Theta = 34°, Phi=21.9°)
Model QSA22L QSA30L QSA50L QSA55L QSC41L QSC60L
Sorting function Automatic Automatic Automatic Automatic Semiautomatic Automatic
Blank size 4.5 ... 10 mm 10 ... 25 mm 1.2 x 3.5mm2 ...
5 mm		 0.8 x 1mm2 ...
3 mm		 6 ...16 mm 8 ... 15 mm
Min. blank thickness 0.06 mm 0.08 mm 0.05 mm 0.05 mm 0.08 mm 0.08 mm
Sorting interval ±7.5 arc sec ±7.5 arc sec ±7.5 arc sec ±7.5 arc sec ±5 arc sec ±5 arc sec
Standard deviation < 6 arc sec* < 6 arc sec* < 6 arc sec* < 6 arc sec*

Theta: <2 arc sec*
Phi: <10 arc sec*

 Theta: <2 arc sec*
Phi: <10 arc sec*
Max. throughput
(blanks/hour)		 1000 1000 1000 1000 120 180
Setup

All machines are placed on a rack with granite plate. The machines are shielded by a plexiglass cover, protecting against X-rays, with door(s) at the front side. The standard setup consists of:

  • 1.2 kW X-ray generator, safety tube shield with fine-focus X-ray tube, Cu anode
  • Scintillation detector with electronics
  • Laser and CCD camera unit with surface-coated mirrors
  • Control unit for stepping motors, sensors, actors and safety functions
  • Control computer (PC) with monitor
  • Software for calibration, sorting, evaluation and diagnosis
The model QSC60L is additionally equipped for laser measurement of both surfaces of the quartz blank.
Options
  • Thermostat
  • Hygrostat
Hints

*) The precision of the measurement depends on the surface quality of the blanks. Optimum results can only be obtained with well cleaned and lapped blanks. With all the machines, the reproducibility can be increased using multiple measurements (overlays), correspondingly decreasing the throughput.

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QSA22L: Fully automatic Quartz Sorting Machine for Round und Rectangular AT-Quartz Blanks

  • Blank size: 4.5 ... 10mm
  • Smallest blank thickness: 0.06 mm
  • Sorting interval: ±7.5 arc sec
  • Standard deviation: < 6 arc sec
  • Throughput: 1000 blanks/hour
QSA22L
 

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QSA30L: Fully automatic Quartz Sorting Machine for Round und Rectangular AT-Quartz Blanks & Wafers


  • Blank size: 10 ... 25 mm
  • Smallest blank thickness: 0.08 mm
  • Sorting interval: ±7.5 arc sec
  • Standard deviation: < 6 arc sec
  • Throughput: 1000 blanks/hour
 QSA30L
 

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QSA50L: Fully automatic Quartz Sorting Machine for Round und Rectangular SMD AT-Quartz Blanks

  • Blank size: 1.2 x 3.5mm2 ... 5 mm
  • Smallest blank thickness: 0.05 mm
  • Sorting interval: ±7.5 arc sec
  • Standard deviation: < 6 arc sec
  • Throughput: 1000 blanks/hour
QSA50L
 

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QSA55L: Fully automatic Quartz Sorting Machine for Round und Rectangular SMD AT-Quartz Blanks

  • Blank size: 0.8 x 1.0mm2 ... 3 mm
  • Smallest blank thickness: 0.05 mm
  • Sorting interval: ±7.5 arc sec
  • Standard deviation: < 6 arc sec
  • Throughput: 1000 blanks/hour
QSA55L
 

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QSC41L: Semiautomatic Quartz Sorting Machine for SC-Quartz Blanks
  • Blank size: 6 ...16 mm
  • Smallest blank thickness: 0.08 mm
  • Sorting interval: ±5 arc sec
  • Standard deviation:
    Theta: <2 arc sec
    Phi: <10 arc sec
  • Throughput: 120 blanks/hour
  • Semi-automatic function: The blanks are loaded and sorted manually
QSC41L
 

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QSC60L: Fully automatic Quartz Sorting Machine for SC-Quartz Blanks
  • Laser measurement at top and bottom surfaces of the blanks
  • Blank size: 8 ... 15 mm
  • Smallest blank thickness: 0.08 mm
  • Sorting interval: 5 arc sec
  • Standard deviation:
    Theta: <2 arc sec
    Phi: <10 arc sec
  • Throughput: 180 blanks/hour
 QSC60L