TMCM connector stay clear problem

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TMCM connector stay clear problem Alessandro
Brez INFN - Pisa Brez_at_pi.infn.it
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CMM results
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TMCM tolerances (TMCM thickness 3.81 nominal)
Closeout pocket 4.2mm
-0.125 0.125
-0 0.2
Nominal adhesive thick. 0.2mm
-0.325 0.125
Nominal stay clear 0.2mm
By drawing TMCM can stick out by 0.125mm
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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)
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Other problems
Vertical screws to guarantee the heights matching
Horizontal screws to push the TMCM against the
closeout
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.
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LAT_PS_01801 procedure changes
A dry mounting test with clearance checkout has
to be performed
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