ASSEMBLY PROCEDURES

 

 

Note: Purchased parts are not shown. These components and their functions are listed in the parts list (see Appendix).

 

UPPER ASSEMBLY:

 

Note: Assume that flange-3 is already attached to the upper body with epoxy.

                                                                

 


Text Box: Fig. Shows an exploded view of the Upper Multisample Probe Assembly.

 

 

 

1. Epoxy flange – 9 to upper body (G-10 tubing .75 inch diameter)

2.      Place lower contacts into the lower part of the sample selector switch.

3.      Place lower part of the sample selector switch on to flange-9 and align the holes for the allen screws.

4.      Attach the gear to the upper part of the sample selector switch with allen screws.

5.      Place upper contacts into the upper part of the sample selector switch.

6.      Place upper and lower parts of the sample selector switch together (with upper contact in the mating

   groove of the lower part of the sample selector switch.

7.      Place tensioner spring into the recess of the upper part of the sample selector switch.

8.      Place collar above the tensioner spring (DO NOT TIGNTEN SCREWS).

9.      Place motor mounts above the collar (DO NOT TIGNTEN SCREWS).

10.  Epoxy lower KF –40 blank to the end of upper body.

11.  Epoxy the 19-pin connector to upper KF-40 blank (let epoxy dry).

12.  Solder the voltage wires into place on the 19-pin connector.

13.  Fasten the upper and lower KF- 40 blanks together with the KF- 40 clamp.

14.  Place pinion gear into stepper motor shaft (tighten set screw loosely).

15.  Secure the stepper motor to the motor mounts and adjust height as needed so that the gears are properly    

 aligned.

16.  Tighten the pinion gear set screws.

17.  Tighten screws on the motor mounts.

18.  Adjust the tension on the sample selector switch as needed, by adjusting the height of the tensioner spring,

 and secure the clamp in place at the desired height.

 

 

 

Fig. 2 Shows (a) Upper and (b) Lower Sample Selector Assemblies.
 
 

 

 

 


LOWER ASSEMBLY:

 

Fig.3  Sample holder assembly and attachment to lower probe assembly.
 
                                      

 

 

 

1.      Solder superconductors to current leads.

2.      Thread voltage wires through stainless steel tubing.

3.      Place spacers around stainless steel tubing (SS Tubing .25” diameter).

4.      Thread voltage wires through the end spacer hole.

5.      Use two/three current leads to align spacer holes.

6.      Epoxy spacers (2) to stainless steel tubing (voltage wires). Allow epoxy to dry.

7.      Assemble remaining leads in spacers.

8.      Slide probe body (SS Tubing 2.375” diameter) over the two spacers.

9.      Thread the voltage wires through hole in the probe body.

10.  Slide the probe body into place (align bottom of probe body with bottom of the end spacer).

11.  Thread sample holder connector into end spacers.

12.  Bend current leads into sample holder groove profile (to get proper shape).

13.  Temporarily remove current leads from the sample holder and braze copper pads to current leads.

14.  Place current leads and sample holder together.

15.  Fix copper pads to sample holder with brass screws.

16.  Align bumper with sample holder and screw the blot into lower assembly.

17.  Drill two holes in the body through to the end spacer for screws.

 

 

Fig.4:   Current Lead Spacer
 
 

 

 



MATING UPPER AND LOWER ASSEMBLIES:

 

 

Flange-3
 

 

Text Box: Fig. 5: Basic Multisample Probe assembly.

 

 

 

 

1.      Secure upper and lower assemblies together at flange-3 with allen bolts.

2.      Fasten the current leads to the lower connects of the sample selector switch with screws and solder them into place.

3.      Connect negative power supply to lower part of the sample selector switch.

4.      Connect positive power supply to upper part of the sample selector switch.