4. Adjustment (for PR620/BMP8) ...........................................................4 - 1
Adjustment flow .................................................................................................4 - 2
Bent needle ........................................................................................................4 - 3
Blunt needle .......................................................................................................4 - 4
Starting test mode / Selecting adjustment test mode ........................................4 - 5
Main board test mode ........................................................................................4 - 6
Panel board test mode .....................................................................................4 - 12
Reference needle bar data for adjustment after main PCB replacement ........4 - 17
Motor belt tension adjustment ..........................................................................4 - 19
Timing belt tension adjustment ........................................................................4 - 20
Needle position adjustment (front/back) ..........................................................4 - 21
Needle bar rising length and needle space adjustment ...................................4 - 23
Needle bar height adjustment ..........................................................................4 - 24
Rotary hook stopper clearance adjustment .....................................................4 - 25
Presser foot height adjustment ........................................................................4 - 26
Needle bar top dead center adjustment ...........................................................4 - 27
Needle threading check ...................................................................................4 - 30
Hoop sensor adjustment ..................................................................................4 - 36
How to reset the counter of the maintenance. .................................................4 - 40
Error message list ..............................................................................................5 - 2
The power is not turned on. ...............................................................................5 - 3
The touch panel does not work. .........................................................................5 - 6
The panel switch does not work. .......................................................................5 - 7
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