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The use of a slip chuck accurately positions and locates the top surface of a substrate where the top and bottom surfaces are relatively irregular.
English (United States)
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Slip Chuck for Accurate Top And Bottom Positioning
The use of a slip chuck accurately positions and locates the top surface of a
substrate where the top and bottom surfaces are relatively irregular.
The substrate 1 is placed on three positioning pins 2. The X-Y linkage 3 is
released which locates the substrate 1 against the X-Y locating dowels 4.
The Z adjust knob 5 is turned clockwise at least four full turns to make sure
the three positioning pins 2 are down through action of the pullies, belt, and
threading, shown in Fig. 2. The top locating Plate 6 is placed onto the base 7
with the three Z locating pins 8 facing downward and the plate is clamped in
When the Z adjust wheel 5 is turned counter clockwise at least six full turns,
the three positioning pins 2 will be raised independently, which in turn, will raise
the substrate 1 into the Z locating pins 8.
The slip springs 9 cause the three positioning pins 2 to slip when the proper Z
location of the substrate is obtained. At this time the top locating plate 6 can be
removed for complete access to the substrates top surface.
By simply replacing the three slip pully assemblies with dowels this chuck can
also be used for bottom locating.