Epson DFX-8500 service manual Platen Gap Motor Value Adjustment, Alpha Value Print

DFX-8500

4.1.7 Platen Gap Motor Value Adjustment

This section describes how to measure the parameter (ALPHA and BETA values) for the PG mechanism unit. Since the ALPHA and BETA values are unique to each mechanism unit, it is written on the label as shown in Figures 4-17 and 4-18, so that it can be confirmed at glance. Be sure to perform this measurement and correct the value written on the label because the value is necessary when the other units (board, printhead) are changed.

CAUTION

;￿This measurement is important because it determines the platen gap, so be sure to use the exclusive thickness gauge set and tension gauge.

￿Thickness gauge (0.43 mm)

￿Thickness gauge (0.80 mm)

￿Tension gauge (200 g) : #F545 (EPSON Part No. B765114601)

;￿Do not turn the printer off during adjustment.

￿When adjusting the platen gap to narrower or wider using the Micro Feed (^) and Micro Feed (v) switches, be sure to adjust the gap by 1 step at a time.

;￿After perform this adjustment, perform the Bi-Directional adjustment as explained in section 4.1.8.

Printhead

ALPHAValuePrint

Figure 4-17. ALPHA Value Print

S id e F r a m e

B E T A V a lu e

5 m m o r le s s

F r a m eP r( oF dr ou nc t )io n N o .

Figure 4-18. BETA Values Print

4-12 Rev. B