The S-725 uses a gimbal mount at the front that pivots as the X or Z leadscrews are turned. These leadscrews put pressure against the leaf springs, noting the springs are not identical.

To disassemble for leadscrew cleaning, loosen the gimbal and gently pull out the arm assembly. You do not need to remove the leaf springs. I also disconnected the final head on the pivot head so that I could fully detach the arm, which was connected via a cable epoxied to the case.

Above: 3 S-750 at left, 2 S-600 at right

The S-600 was discontinued in favor of the S-750.

The handle is compatible between the economy positioners. The finer knurled handle is the original one I had while the coarser grained ones were purchased in 2018.

“Economy Micropositioner” “The model S-750 was developed specifically for contacting larger areas (Pads)”

Stats:

• Joystick ratio 9:1
• Probe scanning area 0.100” x 0.180”
• Vertical movement “Z” 0.50”
• Probe pressure: 10 grams