Vref is calculated based on:
• ID sensor output (Vsp/Vsg)
• Existing reference voltage (Vref or Vts) – Vt
Toner Supply Determination
The machine supplies toner if Vt exceeds the reference voltage.
• Current Vt and reference voltage values can be viewed using SP2-220. Other ID sensor values can
be viewed using SP2-221.
Toner Clutch ON Time
Calculation is based on:
• Vt
• Reference voltage RV (= Vref or Vts)
• S (TD sensor's sensitivity coefficient)
Level Decision Motor On Time (seconds)
1 RV < Vt ≤ RV + S/16 t
2 RV + S/16 < Vt ≤ RV + S/8 1.5t
3 RV + S/8 < Vt ≤ RV + S/4 2t
4 RV + S/4 < Vt ≤ RV + S/2 3t
5 RV + S/2 < Vt ≤ RV + 4S/5 4t
6 RV + S > Vt ≥ RV + 4S/5 5t
7 Vt ≥ RV + S 6t
• The default value for t is 0.6. The value can be changed using SP2-922.
Toner Supply If Sensor Reading is abnormal
ID Sensor
Any of the following is considered abnormal:
• Vsg ≤ 1.65 (when Vsg is read)
Development
269