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ACS Hardware Manual
2.5. Changing the Workholding Devices
N O T E : Aerotech recommends using only electro-polished collets manufactured to DIN6499
specifications.
Various grip diameters are commonly available and can be interchanged following the collet removal and
installation procedure detailed in
ACS series stages are equipped with an ER style collet or a three-jaw gripper chuck. It may be necessary to
change the style of collet or gripper. It is important that only collets designed for a particular collet holder are
used. If necessary, check the part number on the stage to determine if the collet holder is designed for ER25
or ER40 collets.
ACS150 stages can be equipped with an ER25 collet, ER40 collet, or 3J-12 three-jaw gripper. Refer to
Section 2.5.2.
for directions on changing the collet chuck. For 3-Jaw gripper configurations (ACS150 and
ACS200), refer to
Section 2.5.3.
2.5.1. Collet Change Procedure
D A N G E R : To minimize the possibility of bodily injury or death, disconnect all electrical
power prior to performing any maintenance or making adjustments to the equipment.
Step 1: Remove power to the stage before installing or removing the collet.
Step 2: Apply air pressure to loosen the collet chuck.
Step 3: Remove the collet nut by turning it counterclockwise. If necessary, use a spanner wrench (available
from Aerotech). Use caution when removing the collet nut as the collet may fall from its housing and
be damaged.
Step 4: Clean the collet housing, collet nut threads, collet nut, and new collet. Acetone or isopropyl alcohol
may be used to clean the metal components. A small amount of any anti-seize lubricant should be
applied to the collet taper to help reduce friction and decrease wear (refer to section
Step 5: Refer to the instructions in
Step 6: Use the collet nut to guide the collet into the stage
properly in its taper. Be sure that air pressure is still being supplied to the stage so the collet chuck is
in the open position.
Step 7: Tighten the collet nut. Tightening by hand is sufficient as the clamping force is not determined by the
torque of the nut, but by the force of internal springs. Spanner wrenches may be used if desired.
Step 8: Restore power to the stage.
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Mechanical Specifications and Installation
Section 2.5.1.
Figure 2-7
to install or remove a collet from the collet nut.
Chapter 2
(Figure
2-8). Make sure that the collet seats
Section
4.2.1.).
25
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