Symptoms
Vertical7line straightness is a measure of the horizontal distance between the segments of a vertical line plotted in two consecutive swaths. If the plotter is working correctly, this distance should be less than 2 mils. (Print7Quality Plot ' page 8756 3. - VLS.)
(See also ' User's Guide, chapter 4.)
Swath Printing Direction
Swath (n±1)
Swath Printing Direction
Swath (n)
Swath Printing Direction
Swath (n+1)
Maximum allowable VLS Error = 2 mils.
Depending on the causes of the error, lines that are supposed to be vertical may appear as shown below:
4a
Carriage Swath
1 2 3a 3b4b
Direction
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1 | No error |
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2 | Bidirectional error |
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3a | Theta±Z error |
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3b | Theta±Z error |
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4a | Combined error |
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4b | Combined error | |
Customer xpectations
Although the VLS specification satisfies the expectations of most customers, some may complain even when the plotter is working within this specification. If the VLS error is already less than 2 mils, do not try to improve it.
Bidirectional rror
Error numbered 2 above is called a bidirectional error. If you print the same plot using a unidirectional print mode, the error should not appear. (Print modes ' chapter 5.)
This error can occur for various reasons, including:
DIncorrect distance between nozzles and media. (Adjustment ' chapter 7.)
DEncoder7strip slots are damaged or dirty.
DDirt on the pulley is causing the belt to slip.
DFriction between carriage bushings and slider rod: (See ' Error code Steady 346.)
(See ' Error code Steady 234.)
C4699790000 | Troubleshooting 8759 |