Savin SDC103A Service Manual download pdf (Page 84)

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1.4 TONER SUPPLY CONTROL

1.4.1 Toner Supply Control Method

This machine has two toner supply control methods: fuzzy control mode, and

fixed supply mode.

Normally this machine uses fuzzy control. The fixed supply method is used

only when abnormal conditions occur during the process control self check.

1.4.2 Fuzzy Control Mode

(1) Overview

First, the machine assesses the amount of toner per unit area on the drum

(M/A). This is determined from two sensor inputs: Vsg, and Vsp(toner).

The fuzzy logic algorithm then uses the most recent M/A values to assess

current toner density conditions.

The output from the fuzzy logic process is then combined with the image

area ratio obtained from the image data signal coming from the IPU board.

The result of this calculation is the required toner supply amount, and from

this, the machine determines the toner supply motor on-time that is needed

to supply enough toner.

Vsp Detection for Toner

Supply Control

Image Area Ratio

Determination of the Toner

Supply Amount

Copy

Calculation for the Toner

Supply Motor on Time

Fuzzy Control

Detailed

Section

Descriptions

PROCESS CONTROL

SM 2-15 A166/A187/A189

CÓPIA NÃO CONTROLADA

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Savin SDC103A Service Manual Page 84

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