Aerotech VascuLathe ACS Series User Manual page 25

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VascuLathe -ACS Hardware Manual
Step 7: Begin removal by loosening the four shorter (factory installed) screws, 1/4 turn at a time. Loosen the
screws in a cross pattern. For example, loosen screw number 2, then screw number 6, then screw
number 8, then screw number 4, then return to screw number 2. Repeat this process until the longer
screws are supporting the tension of the springs entirely. It is then safe to remove the shorter screws
completely.
Step 8: Using the same method as in step 7, remove the longer screws until the spring tension is completely
relieved.
Step 9: Carefully slide the collet piston assembly out from its housing. Use caution not to tilt the piston
assembly in its housing as this could cause damage to the housing, seals, or piston itself.
Step 10: Remove the collet sleeve and collet sleeve O-ring.
Step 11: Thoroughly clean the new collet sleeve and nut as well as all old components. Inspect the seals and
O-ring for damage or excessive wear and replace if necessary
Step 12: Insert the collet sleeve O-ring into its groove. Place the new collet sleeve into the shaft. Although the
collet sleeve is piloted to ease assembly, it may require some indicating of the taper to achieve the
best possible runnout. Finger tighten all eight screws, then tighten in a cross pattern to a torque of
1.8-2.0 Nm (16-18 in-lbs).
Step 13: Reinstall the collet piston assembly into its housing. Use of O-ring lubricant is recommended during
reassembly. There are chamfers to help guide the piston into place, but use caution not to twist or
damage the seals.
Step 14: Replace the collet piston assembly.
Step 15: Installation of the collet cover is the reverse of removal. Begin with the four 12 mm long screws in
every other hole and tighten until they bottom out in their respective holes. Then install the shorter
original screws into the remaining holes and tighten in a cross pattern until the collet cover is seated
against the shaft. Install the remaining four original screws. Torque all screws to a final torque of 1.8-
2.0 Nm (16-18 in-lbs).
Step 16: Apply air pressure to the stage in order to install the collet.
Step 17: Install the new collet and collet nut as described in
Procedure
Step 18: Restore the air supply to the original settings and restore power to the stage.
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Section 2.5.1. Collet Installation and Removal
Chapter 2
Installation
17