Stratasys J750 User Manual page 68

Stratasys J750 User Guide
Optimizing The condition of the print heads directly affects the quality of printed models.
(Calibrating) To maintain optimum printing, you should routinely test the print heads, and
Print Heads calibrate them to the best working configuration possible by running the
Head Optimization wizard every 300 hours of printing.
During this procedure, you place a scale on the build tray and connect it to
the printer. Printing material (resin) is jetted from each head and its weight is
automatically recorded and the wizard determines how to optimize the print
heads.
If, during the optimization process, the wizard determines that a print head is
faulty—or that it is negatively affecting layer uniformity with the current head
configuration—the wizard instructs you to replace it. If this happens, you can
continue the wizard to replace the print head, or abort the wizard, to replace
the head at another time.
Run the Head Optimization wizard every 300 hours of printing or whenever
the condition of print heads is negatively affecting the quality of printed
models, or if you suspect that there is a problem with one or more of the print
heads.
Note: To accurately test and calibrate print heads, they must be clean. If
necessary, run the Cleaning wizard before beginning this procedure.
To test and calibrate the print heads:
1. Prepare—
2. Start the Head Optimization wizard from the Options menu.
DOC-08040 Rev. E
❒ disposable cleaning gloves (any clean, powder-free protective gloves)
❒ pink paper
❒ the Missing Nozzles ruler
❒ the scale supplied for use in the Head Optimization wizard
Important: Ensure that the scale is calibrated before beginning this
procedure.
Figure 4-64 Starting the Head Optimization wizard
4 Operating and Maintaining the Stratasys J750 3D Printer
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