Stratasys J850 Manual page 90

25. In the next wizard screen, confirm that you have removed all tools and
objects from the printer.
26. Close the printer cover.
The wizard continues by heating the heads, then filling and purging them.
If there are no installation problems, the optimization procedure begins,
to calibrate the print heads to the best working configuration—see
"Optimizing (Calibrating) Print Heads" on page 4-51.
If installation problems are detected, the wizard alerts you and instructs
you how to continue (see "Installation Problems" below).
27. After replacing print heads, you should check the head alignment before
using the printer to produce models. In the final wizard screen, select
If the printer detects that there is a problem after you install print heads, a
relevant warning screen appears.
➢ If the printer software does not detect the replaced head, release the print
head card and re-insert it. (see "Removing the Defective Head" on page 4-
62).
and click to run the Head Alignment wizard.