GLAST LAT ProjectOctober 1st, 2004 GLAST LAT Tracker Anomaly Resolution Team 1 TMCM connector stay clear problem Alessandro Brez INFN - Pisa

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Presentation transcript:

GLAST LAT ProjectOctober 1st, 2004 GLAST LAT Tracker Anomaly Resolution Team 1 TMCM connector stay clear problem Alessandro Brez INFN - Pisa Gamma-ray Large Area Space Telescope

GLAST LAT ProjectOctober 1st, 2004 GLAST LAT Tracker Anomaly Resolution Team 2 CMM results

GLAST LAT ProjectOctober 1st, 2004 GLAST LAT Tracker Anomaly Resolution Team 3 Nominal stay clear = 0.2mm Nominal adhesive thick. = 0.2mm Closeout pocket 4.2mm TMCM tolerances (TMCM thickness 3.81 nominal ) By drawing TMCM can stick out by 0.125mm

GLAST LAT ProjectOctober 1st, 2004 GLAST LAT Tracker Anomaly Resolution Team 4 Changes: reduce by 0.1mm the nominal thickness of the adhesive layer and of the thickness of the flange of the fixation pin Recuperate the rest of the tolerance selecting the pins with nominal flange when there is a conflict (small pocket + thick TMCM)

GLAST LAT ProjectOctober 1st, 2004 GLAST LAT Tracker Anomaly Resolution Team 5 Other problems The operator stops to push the tool against the tray closeout at a fixed torque.The tool can stop against the bias circuit surface, leaving a not controlled adhesive thickness. Vertical screws to guarantee the heights matching Horizontal screws to push the TMCM against the closeout

GLAST LAT ProjectOctober 1st, 2004 GLAST LAT Tracker Anomaly Resolution Team 6 LAT_PS_01801 procedure changes This metrology was performed from top side only, checking for pad alignment. The stay clear of the connector could not be observed. A check of the connector stay clear looking from the bottom side will be added A dry mounting test with clearance checkout has to be performed