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Step 1 of 5

1. An extra cover plate, to fill up the empty space between the top and bottom plates. The conjecture is that it was made in order to fix a screwup at some point in the thing's design. Either way, it needs to go on.
2. The bottom plate itself.

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Step 2 of 5

1. The dewar window.
2. You can see the screwholes for where the filter wheel motor gets mounted, as well as the hole where the friction drive is inserted.
3. The extra piece is now attached. Just beware: there are lots of extra holes that currently serve no purpose.

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Step 3 of 5

1. This is outside of the bottom half. Again, the filter wheel friction drive goes through here.
2. Dewar window.
3. The felt you see here is where you mount the light-tight hat that goes into the telescope.

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Step 4 of 5

1. The shutter window. The shutter slides back and forth across the plate here. See the shutter page for more details.
2. Shutter motor drive goes here, and turns the gear beside it.
3. This gear has teeth that hook up to a line of teeth on the shutter itself. See the shutter page for more details.
4. Limit switches. 4 is the left, 4a is the center switch (to align the shutter with the window) and 4b is the right.
5. The top half of the whole mechanism. See step 3. This is just to demonstrate the alignment with respect to the bottom plate.

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Step 5 of 5

1. Shutter window again. The circle around it is where the dewar gets mounted. You can see a lot of screw-holes: three of those are new, to mount the new dewar plate ACE is making for us. The rest are from who knows when and where!
2. The shutter motor gets mounted to the left of the hole here. The hole is where the drive gets inserted.
3. This is where the filter wheel motor gets mounted. The hole is where the friction drive goes.
4. The solenoid. That space to the right is where the wires get screwed on for the encoder, which fits in that rectangle to the left (see the page on the solenoid for details).
5. Screw this off to lower the bottom half of the plate so you can insert/take out the filter wheel once this thing is mounted on the telescope.

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