Vixen R200SS Manual

How to collimate

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Adjust to 68mm by enlarging or reducing a printed copy

68mm

How to collimate the R200SS

First loosen all the three collimation "push" screws and tighten the other three collimation

"pull" screws on the primary mirror cell completely to "reset" the primary mirror to a

position where the primary mirror is placed closely to the mirror cell.

Remove the blue cap on the center of the four-vane spider to access adjustment

screws for collimation. Loosen the fixing screw on the dead center of the spider to remove

the secondary mirror holder with the mirror. There might be some washers on the center

fixing bolt with which the secondary mirror holder is attached and please take care not to

drop them onto the primary mirror.

Page 1 Adjust to 68mm by enlarging or reducing a printed copy 68mm How to collimate the R200SS First loosen all the three collimation “push” screws and tighten the other three collimation “pull” screws on the primary mirror cell completely to “reset” the primary mirror to a position where the primary mirror is placed closely to the mirror cell.
Page 2 Put a tiny dot at the center of the optical axis of the secondary mirror (offset 3.8mm from the center of the elliptical secondary mirror, refer to the Figure 2) by using a template below. A size of the dot should be about 1mmm to 2mm in diameter. Return the secondary mirror holder with the mirror to the original place, and tentatively fix it with the fixing bolt lightly.
Page 3 10.Again you need to adjust the position of the secondary mirror precisely with the collimation screws “B”, “C” and “A”. When you shift the secondary mirror upper or lower, turn the screws “B” or “C” only and don’t use the screw “A”. When you shift the secondary mirror forward, turn the screw “A”.
Page 4 11.Aligning the primary mirror: When looking into the drawtube without attaching an eyepiece, you can see like the diagram blow if the optical axis is correct. If you cannot see like the diagram, align the primary mirror with the collimation “push and pull” screws on the primary mirror cell.