Chapter 6 CleanNg System; Purpose Of Head CleanNg; Jam Test; Purpose Of The Jam Test - GRAPHTEC JS500 User Manual

Chapter 6 Cleaning system
6.1 Purpose of head cleaning
Leaving the printheads without performing printing for a while leads to fixed ink in the nozzles which may result
n defectve ejecton or non-ejecton of nk.
Printing with the nozzles which have defective ejection or non-ejection of ink deteriorates printing quality due to
banding and other issues. Check the nozzles by the Jam Test before printing, and perform printhead cleaning
f defectve ejecton or non-ejecton of nk occurs often.
See "6.2 Jam Test", "6.3 Frng (empty ejecton)" and "6.4 Prnthead Cleanng" descrbed later for detals about
the Jam Test and how to perform prnthead cleanng.

6.2 Jam Test

6.2.1 Purpose of the Jam Test

This test is used to check the condition of nozzles of the printheads. Check the results of the Jam Test printing
if there are any nozzles which have defective ejection or non-ejection of ink.
If many defective ejections or non-ejections of ink are identified, perform printhead cleaning.
See "6.5 Cleanng durng prntng " and "6.6 Changng the Frng Volume (the amount of empty ejectons)"
descrbed later for how to perform prnthead cleanng.

6.2.2 How to perform the Jam Test

(1) Select [3.Cleanng Tool] from the man menu by usng [▲▼] (Up/Down) keys, and press the [ENTER] key.
Menu
Offline
(2) Select [2.Jam Test] from the sub menu by usng [▲▼] (Up/Down) keys, and press the [ENTER] key.
Menu
Offline
(3) The PH carrage moves to the prntng startng poston, and the Jam Test prntng starts.
Durng operaton, a "Busy" message s dsplayed on the LCD.
1.Ink Status +
2.Heat Status +
3.CleaningTool +
4.Print Para +
1.Firing -
2.Jam Test -
3.PH Maintenance -
4.Home Post. -
6-1