2.4 m Alt-Azimuth Telescope Maintenance Manual MM-12920-1
EOS Technologies, Inc. • 3160 East Transcon Way, Suite 180 • Tucson AZ 85706 • USA
12/1/2009
Tel: +1 520 624 6399 • Fax: +1 520 624 1906 • Web:
www.eostech.com
Page 39 of 43
7. Carefully lift the M3 Mirror off of the support, being careful not to place unnecessary stress
on the flexures. It may be helpful to have a second person steady the M3 Mirror Mount
Assembly during this process.
8. Remove the three 8mm Stainless Steel Shim Washers from between the M3 Mirror Mount
Flexures and the M3 Mirror Mount and set them aside.
9. Place the mirror in the M3 shipping container and pack it for transport to the coating facility.
3.3.7 PROCEDURE FOR REINSTALLING THE TERTIARY MIRROR TO THE SUPPORT
1. Wear a dust mask and powder-free latex gloves. Remove any jewelry and items from
pockets that may fall onto the mirror surface.
2. Place the M3 Mirror (COM-5906) and M3 Mirror Mount Assembly (ASY-5818) on a secure,
level workspace.
NOTE: During this procedure, take care not to disturb the M3 Mirror Mount Locator
Hex Nuts (COM-5826) or M3 Mirror Mount Locator Buttons (COM-5825) as
this could affect alignment.
3. Place the three 8mm Stainless Steel Shim Washers (set aside during the disassembly
process) over the threaded ends of the M3 Mirror Mount Flexures. Make sure these
washers stay in position during the remainder of the assembly process.
4. Carefully set the M3 Mirror on the support, being careful not to place unnecessary stress on
the flexures. It may be helpful to have a second person steady the M3 Mirror Mount
Assembly during this process.
5. While one person holds the M3 Mirror (COM-5906) by the edge, thread the three M8 Hex
Nuts onto the M3 Mirror Mount Flexures (COM-5695), see Figure 7.
6. While holding each corresponding M3 Mirror Mount Flexure with an M6 Hex Wrench, tighten
the three M8 Hex Nuts that secure the Flexures to the M3 Mirror Mount. It may be
necessary to use a shortened M6 Hex Wrench (provided with the telescope tooling) to hold
the lower of the three flexures.
CAUTION: It is critical that the M3 Mirror Mount Flexures be held stationary
while tightening the M8 Hex Nuts. Failure to do so may result in
damage to the Flexures or M3 Mirror.
7. Use 10 gauge Stainless Steel tie wire to connect the M3 Safety Pucks (COM-13253) to the
M3 Mirror Mount Gussets (COM-5823). Verify that the wire exerts no force on the M3
Safety Pucks or the M3 Mirror Mount Assembly as this can affect the mirror figure and
optical quality.
Note:
The tie wire is only present as a safety mechanism in the unlikely
event that the mirror bonds fail. Under normal conditions it should
not exert any force on the M3 Safety Pucks or the M3 Mirror Mount
Assembly.
