Supplement To Chapter 2: Menu Operations; New Shuttle Stroke Calibration - Tally T6218 Maintenance Manual Supplement

Supplement to Chapter 2: Menu Operations

New Shuttle Stroke Calibration

Hammer bank mechanisms can experience certain manufacturing variations that result in
horizontal dot placement across hammer boundaries being different from dot placement within
the bounds of a single hammer. If one prints a uniform gray page, the problem is exhibited as
vertical light (or dark) streaks that occur at the physical boundaries between hammers. A
calibration procedure has been introduced that allows one to compensate for this problem.
The calibration parameter is time related, pertaining to the portion of shuttle stroke interval in
which hammer firing is permitted. This procedure is named "Shuttle Stroke Calibration". Note
that this calibration can only cure the "streaking" appearance if the streaks are uniform across the
entire width of the paper. Shuttle stroke calibration would typically be done after a hammer lead
time calibration has been performed.
Shuttle stroke calibration Procedure Details:
1. Ensure proper paper alignment and tensioning.
2. If hammer lead time calibration has not been performed, do it first.
3. Set Tech Access = ON.
4. Go to menu item: TEST
5. Press Enter key to activate shuttle stroke calibration procedure.
6. Several one-inch high bands of gray will be printed across the page, each with a
heading indicating the corresponding shuttle stroke parameter value.
7. After completing printout of gray bands for each possible cal value, the panel display
will show the current shuttle stroke calibration value (e.g. Stroke = 100).
8. Examine the printed gray bands and find the one with the least amount of vertical
streaking.
9. Press the up or down arrow keys repeatedly until the new desired cal value appears.
10. Press the Enter key to apply the new shuttle stroke calibration value.
11. The display will briefly show the message "End Stroke Cal" and then return to the
Calibrations menu display.
P/N 1149-084775
Diag Calibrations
Tally Printer Corp.
Menu Operations
Shuttle Stroke.
15