Avery Dennison SNAP 700 RFID Linear Knife - Manual (Page 18)

18
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Adjustments Snap Linear Knife
Adjustments
Web Tracking in Center of Printer
NOTE: Cut quality and straightness requires the stock to track down the center of the printer because the Linear
Knife cuts across the web from both sides. Two settings adjust web tracking. The first setting is moving the web
front to back as controlled by the Feed Roller Assembly. The second setting is the position of the Web Guide
Assembly.
The Linear Knife makes one pass across the web for each tag cut. This means that if the knife starts its cut from
the near side of the web and the next cut starts from the far side of the web. The cut is done while the web is
moving through the printer. The knife has been designed when properly installed to be located in the center of the
feed roller assembly and the print head assemblies. If one or both of these setting are not correct the cut will vary
in width every other cut.
Setting the Web Tracking
Web tracking is the movement of the tag stock front to back in the Feed Assembly. To correct for this movement
there are four “Jack” Set Screws located on the inner mount bracket on the Feed Assembly. These will be adjusted
accordingly once the printer has been loaded with stock and run.
1. Load the printer with supplies (Stock & Ink) Make sure the tag stock supply roll is tight and the sides of the
roll are flat. If the roll is not flat it will track off the center of the print heads.
2. Leave the web guide open so the guides do not control the material moving through the printer.
3. Load the internal test format (see SNAP 700 user manual). The wide test format image will look like this.
The line running left to right should be in the center of the tag. The center of the line to the metal frame is
4” (101.6mm).
4. Start the printer, if the stock is walking toward the back of the printer, the outboard end of the Feed
Assembly needs to move toward the stacker. (Don’t worry if the knife cut is out of square, this will be
corrected later)
5. Loosen the three ¼-20 cap screws and turn the two left set screws 1/8 of a turn so that it will force the outer
end to move toward the stacker.
6. Snug the ¼-20 cap screws starting with the Upper right, then the lower, then the upper left.
7. Once all are snug, tighten the cap screws in the same order.