SATO CL612 Manual do Utilizador descarregar pdf (Página 2)

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8. For “picket fence” (horizontal) oriented bar codes, the recommended beam location

is on the tear bar.

Place a sample bar code in the center of the intended laser beam path. For best

results, this sample should match the type of bar code(s) and material that is to be

analyzed in the final application. Knowing the X dimension (narrow element width of

the bar code(s)) is required for best focus and accurate analyses.

Note: SV

Calibration symbols have a 10-mil X dimension unless otherwise indicated.

10. Take a Scan Profile with ScanView.

11. Ensure the bar code(s) is in the center of the scan path.

12. Ensure the scan profile contains no distortion from light reflecting from objects in or

near the light path. Examples of a good and bad reflectance profile are shown in

Figures 1a and 1b respectively at the end of this section. One major aspect in a

good profile is the low reflectance points (the bars) in the symbol are uniform all the

way across the code. Optimum signal amplitude should be adjusted so the bar code

element reflectances are between the 90% and 10% marks shown in yellow on the

screen. Scanner angle has the most effect on the signal amplitude.

13. Continue adjusting the SV unit’s placement until a good scan profile is obtained. The

scan angle may have to be altered slightly or a light shield may have to be installed

in extreme cases to achieve a good reflectance profile. If adjustment of scan angle

does not produce the correct signal amplitude or placement, adjust scanner gain and

offset per the Adjusting Scanner Gain and Offset Section in the SV Operator’s

Guide.

14. Place ScanView in Session Mode.

15. Click on the Report an Analysis Speedbutton.

16. Ensure that X in the lower panel of the Bar Code Analysis Screen matches the X

dimension of the symbol within +/- .1 mil.

17. Adjust distance of the SV unit from the bar code until the X dimension matches the

desired value. (If X is analyzed as too large, move the scanner farther away; if X is

too small, move the scanner closer.)

18. Repeat steps 13 through 17 until no further mounting adjustments are required.

19. Remove the symbol from the laser beam path.

20. Set the verifier sync mode to edge (Command ~LX1), polarity falling edge

(Command ~LP0).

21. Set the proper SV output mode for this cable – Mode 1 is standard. Command

~LV01). See the Mode 1 description below.

22. Set the proper SV initialization (Command ~PR0210).

23. Set the verifier for the appropriate number of codes per sync interval for the

application via the ~LN Command.

24. Program the verifier’s fail parameters as desired.

25. Connect AC power cord to the printer.

26. Turn on printer power.

27. For 8400 and 8450 printers, set the printer for dispensing by pulse in Mode S and set

printer external signal to Type 1. For printer models with DIP switch settings, DIP

switch bank 3, switch 5 in the ON position provides dispensing by pulse mode. If in

doubt about setting dispensing by pulse operation, consult the printer Operator’s

Guide.

28. The verifier and printer are now ready to operate.

Figure 1a – Good Reflectance Profile

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