Electrophotography Applications

Our close association with, and commitment to, the electrophotography industry continues with innovative designs for voltmeters, charger-roller power supplies, and low cost, high performance OEM sensors. These products are used in an electrostatic image-forming process. Electrophotography is utilized in laser printers, copiers, fax machines and many other printing devices.(corona charging, roller charging, etc.), while electrostatic voltmeters (stand-alone or on-board) are used in electrophotography quality control and frequently provide feedback for process adjustment. Trek also supplies products for precise toner charge-to-mass ratio measurements.

Electrophotography Industry Overview New (Adobe PDF)
Models 610E, 677B, 212HS, 370

Paper Charge Measurements
Trek’s DC feedback electrostatic voltmeters provide precise measurements of the voltage of the charged paper in electrophotographic processes.
Trek Product: 370, 347

Developer Roller Measurements
Trek’s DC feedback electrostatic voltmeters provide precise measurements of the surface potential of developer roller surfaces as controlled in electrophotographic processes.
Trek Product: 341B, 370, 347

Corona Charging/Discharging Supplies
Trek’s high voltage power supplies/amplifiers/controllers are used to:

  • Control the DC, AC or, AC with DC offset voltages.
  • Control the total output current. (It mode)
  • Control the return current. (Ir mode)
  • Control the output current minus the shield current. (Is mode)

Trek Product: 610E, 10/10B-HS, 20/20C

Scorotron Grid Supplies
Trek’s high voltage power supplies/amplifiers are used to control the scorotron grid voltage to regulate the photoconductor voltage level.
Trek Product: 677B, 601C

Primary Charge Roller
Trek’s charge amplifies are used to control the charging level of a primary charge roller to uniformly charge a photoconductive surface. There supplies provide an ability to control a DC offset level with an added AC current level.
Trek Product: 615-3, 615-10

Developer Roller Supplies
Trek’s high voltage amplifier/power supplies are used to control DC, AC, or AC with DC offset voltage levels to control the voltage level of a developer roller to provide highly efficient toner transfer from the developer roller to a photoconductive surface.
Trek Product: 609E-6, 5/80

Toner Charge-to-Mass Ratio Measurement System
Trek’s charge to mass measurement system is able to accurately measure the charge to mass ratio of either dual component or single component developers.
Trek Product: 212HS

Photoconductor Measurements

Trek’s DC feedback electrostatic voltmeters provide precise measurement of the surface potential of photoconductive surfaces.
Trek Product: 370, 347, 368A

Examples of Measurement:

  • Charging Acceptance and Uniformity Testing
  • Dark Decay Measurements
  • Discharge Measurements
  • Residual Voltage Measurement
  • Time of Flight Measurements
  • Lifetime Measurements
  • Light Decay Measurements (Trek 370TR)
  • High Spatial Resolution Measurements

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