Stratasys J750/J735/J720 User Guide
4 Operating and Maintaining the Printer
DOC-08040 Rev. R
4-49
7. Insert and tighten the roller scraper blade screws.
Important:
l
Tighten the screws in the order shown in Figure 4-60.
l
Use the new screws supplied in the replacement kit
Figure 4-60 Tightening the roller scraper screws
8. After tightening the screws, inspect the blade and make sure that it is straight.
If necessary, loosen the screws and tighten them again, evenly.
9. Return the roller waste collector assembly and the right UV lamp to the print
block. (See steps 5 to 7 on page 4-44 in "Cleaning the Roller Waste Collector
and Inspecting the Roller Scraper".)
Aligning the Print Heads
You should check the alignment of the print heads—
• once a month
• after replacing one or more heads
• if model quality is not acceptable even after cleaning the orifice plate on the
bottom of the print block (see "Cleaning the Print Heads, UV Lamp Glass,
Roller and Wiper" on page 4-38).
This procedure takes about 20 minutes.
To check the alignment of the print heads:
1. Prepare—
❒
a transparency sheet, A-4 or Letter size
❒
any type of adhesive tape, to fasten the transparency sheet to the build
tray
2. Start the Head Alignment wizard from the
Options
menu.