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Dimension BST 1200 / SST 1200 Service Guide
P). "Can't Find Home - Check Modeling Base" displayed on LCD
1. Head stops over Z stage/modeling base
2. Head moves to lower modeling base sensor but
does NOT move over substrate
3. Head completes finding modeling base routine
then displays error message.
4. Head stops moving while attempting to lower
Z detect sensor plunger
Q). System VERY slow to reach temperature
1. Envelope takes unusually long (over 40 minutes) to
reach temperature.
1. No modeling base
2. Modeling base is used/defective - Replace
1. Modeling base sensor is NOT turning off before performing touchdown (verify using LED)
2. Y EOT sensor is not operating correctly. Check using Maraca or DataStat
3. Debris on Z Stage casting prevents Z stage from finding home
1. Z offset value is incorrect (out of operating range) Check/adjust value using Maraca
or download CAL file from floppy to restore factory calibration values.
2. Flatness check may have failed. Use HT to read the touchdown values. Compare these
values to the "tolerance" value displayed. If this value is over 1728 replace the substrate.
3. If failure reoccurs check XY table level using the head bracket and dial indicator.
Values should be a band of 0.010 total for the four points (0.003 total)
If values are out of spec: Check for loose tray mounting screws. If so level per procedure.
If screws are tight, level the XY table per procedure.
4. If failure reoccurs the X rear guide rod may be out of alignment. Replace XY table.
1. Using PDB LED's check to see that all sensors are working correctly.
If not check sensor connections/wires or replace sensor
2. Z offset value is incorrect (out of operating range) Check/adjust value using Maraca
or download CAL file from floppy to restore factory calibration values.
1. Replace PDB (Loose SS relay)
2. Envelope heater(s) bad. Check heater resistance - should be about 36 ohms.
Page 8-27
Troubleshooting
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