Diffraction SBIG AFW Series Manual de usuario

DIFFRACTION LIMITED

SBIG®AFW Series

Filter Wheel

User’s Manual

Version 1.02 - April 28, 2021

DIFFRACTION LIMITED

This equipment has been tested and found to comply with the limits for a

Class A digital device, pursuant to part 15 of the FCC Rules. These limits are

designed to provide reasonable protection against harmful interference when

the equipment is operated in a commercial environment. This equipment

generates, uses, and can radiate radio frequency energy and, if not installed

and used in accordance with the instruction manual, may cause harmful

interference to radio communications. Operation of this equipment in a

residential area is likely to cause harmful interference in which case the user

will be required to correct the interference at his own expense.

Industry Canada Compliance Statement

This Class A digital apparatus complies with Canadian ICES-003.

European Union

This product has been tested and found to comply with the limits for Class A

Information Technology Equipment according to CISPR 22/European Standard

EN 55022. Warning: This equipment is compliant with Class A of CISPR 32. In

a residential environment this equipment may cause radio interference.

Visit us at:

http://diffractionlimited.com

and

http://forum.diffractionlimited.com/

Diffraction Limited

59 Grenfell Crescent, Unit B, Ottawa, ON Canada, K2G 0G3

Telephone: 613-225-2732

Fax: 613-225-9688

and Aluma® are registered trademarks of Diffraction Limited. Aluma AC, AFW,

StarChaser, SC-2, SC-3, ST-4, STF, STX, STXL, AO-X, MaxIm DL, and MaxIm

LT are trademarks of Diffraction Limited. Windows is a registered trademark of

Microsoft Corporation.

All other trademarks, service marks, and trade names appearing in this guide

are the property of their respective owners.

DIFFRACTION LIMITED

SBIG Advanced Filter Wheel User’s Manual

Table of Contents

1 –The SBIG AFW Advanced Filter Wheels ....................................................... 4

2 –Supplied components.................................................................................. 5

3 –Installing the Filter Wheel ........................................................................... 6

Filter Installation........................................................................................... 6

Attach the Filter Wheel to the Camera ........................................................... 8

Final Assembly .............................................................................................. 9

Dual Wheel Assembly .................................................................................. 10

4 –Setting up the Filter Wheel........................................................................ 13

Single Filter Wheel....................................................................................... 13

Dual Filter Wheels....................................................................................... 14

DL Imaging –Aluma CCD, Aluma AC, STC Series ................................................................... 14

SBIG Universal –STX, STXL Series.......................................................................................... 17

5 –Specifications............................................................................................ 19

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1 –The SBIG AFW Advanced Filter Wheels

Diffraction Limited’ SBIG AFW series filter wheels are designed to consume the

minimum back focus distance while providing fast and quiet operation.

The AFW series wheels are designed to directly interface to all SBIG cameras

that utilize the “STX” style accessory mounting. This includes all Aluma AC

models as well as legacy STX and STXL models.

Currently two varieties are available:

•AFW-10-50SQ –ten slots accommodating 50 mm square filters, and

•AFW-12-50R –twelve slots accommodating 50 mm round filters.

A double-stack kit is available for all AFW wheels. This allows for two wheels to

be stacked, providing additional filter slots.

The AFW can be used with the StarChaser SC-3 SHORT, which provides self-

guiding in front of the filters. In conjunction with the StarChaser it is also

compatible with the SBIG AO-X adaptive optics unit.

All power and control signals for the wheel is provided by a single DB-9 style

connector, which connects directly to the main camera using the supplied

cable. No other connections are required.

Note: The DB-9 connector is not a serial port. It can only be connected to an

SBIG camera AUX connector.

The AFW design allows the filter wheel mounting screws to be accessed without

removing filters or the carousel. This makes installation and removal very

quick and easy.

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2 –Supplied components

Observe proper handling procedures for sensitive electronic equipment and

unpack your SBIG Advanced Filter Wheel and accessories carefully in a clean,

dry, static-free area. Inspect the contents to ensure all components are present

and in good order. You should find the following:

•AFW-10-50SQ or AFW-12-50R Filter Wheel

•DB-9 Male-Female cable, 2.5 foot

•6-32 x 5/16” Torx wrench

•5/64” Hex wrench

•1/16” Hex wrench

•Qty 2 –6-32 x 5/16” Torx flat-head screws

The included wrenches are used to install the filters and mount the filter wheel

onto the camera.

The DB-9 cable is a high-quality cable with large gauge wiring to provide

adequate power and control signals to the wheel.

Warning: Do not substitute a low-quality or longer cable as this will cause

control problems, including intermittent wheel operation.

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3 –Installing the Filter Wheel

Please follow these steps carefully to ensure correct installation.

Filter Installation

1. Lay the filter wheel down on a flat book or similar object so the protruding

screws and motor cover do not touch the tabletop.

2. Using the 5/64” Hex wrench, remove the 5 screws attaching the cover, and

set the cover aside.

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3. Each filter is retained by screws with fiber washers that help prevent

damage to the glass filter. Using the 1/16” Hex wrench, remove the screws

and washers for each slot.

CAUTION:

Be gentle! Apply only LIGHT vertical pressure to the retention

screws.

The filter carousel is intentionally very thin, to provide the minimum

possible impact on back focus distance.

If significant vertical pressure is applied to the screws, the carousel

may be warped, which could affect filter wheel operation.

4. Each filter slot will contain a plastic spacer. Remove the spacer, and set it

aside for now. The spacer is used when mounting thinner filters.

5. Install the filters in the slots, in the desired order (typical order is

Luminance, Red, Green, Blue, H-Alpha, S-II, O-III). The slots are labelled

starting at 1, which will match the slot numbers in your software.

6. Reinstall the spacers as follows:

•If your filters are 3 mm thick, do not install the spacer.

•If your filters are 2 mm thick, orient the spacer so the small cutouts align

with the washers. The cutout is 1 mm deep, so this effectively reduces

the thickness of the spacer to 1mm.

•If your filters are 1 mm thick, orient the spacer so the washers do not

align with the cutouts. You can flip the spacer over to do this.

7. Reinstall the fiber washers and retention screws. If you are using 2 mm

thick filters, make sure the washer nests into the cutout in the spacer.

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Attach the Filter Wheel to the Camera

The next step is to attach the wheel to the camera. The wheel base including

carousel, circuit board, and motor attaches directly to the camera. The lid of

the filter wheel will be facing the telescope.

Note: The DB-9 connector on the filter wheel is not a serial port. It can only be

connected to an SBIG camera AUX connector.

1. Ensure that the power into the camera is disconnected.

CAUTION:

Never “hot plug” cables into or from units. This is especially important

for the AUX connector. Always disconnect power before connecting or

disconnecting accessories or cables.

2. Remove the adapter plate from the front of the camera. Note the location of

any shim washers under the screws (the camera package should include a

“shim sheet” showing the shim locations, if any).

3. Remove any additional mounting screws from the front of the camera (some

have additional screws to accommodate different accessories).

Note: For the next series of steps, you will need two 6-32 x 3/8” Torx

flat head screws. They are included with the wheel in a small plastic

bag. There are also two identical screws already installed in the wheel;

they are captive under the carousel.

4. Note that two of the filter wheel mounting screws are under the carousel.

They can be accessed by rotating the carousel by hand to align the hole.

AFW filter wheel attached to an Aluma AC series camera

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5. Carefully position the filter wheel over the camera, so the two “captured”

screws that are under the carousel line up with the mounting holes on the

camera. Make sure the AUX connector is oriented close to the camera’s

connector panel.

6. Manually rotate the carousel to line up an access hole with one of the

screws.

7. Using the supplied Torx wrench, thread in the first screw but do not

tighten.

8. Manually rotate the carousel to line up with the second screw and use the

Torx wrench to thread in the screw, but do not tighten.

9. Install the remaining two 6-32 x 3/8” Torx flat head screws.

10.Now tighten all four screws. You will need to manually rotate the carousel

as required to access the two captive screws.

Final Assembly

The AFW filter wheel can be used in conjunction with the StarChaser

SC-3-SHORT, which provides self-guiding in front of the filters. It is also

compatible with the SBIG AO-X adaptive optics unit.

1. Reattach the filter wheel cover using the five screws removed in Filter

Installation Step 1.

2. If you are planning to use a StarChaser SC-3 SHORT, it will be installed

directly on top of the filter wheel. Please consult the StarChaser manual for

details.

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3. If you are planning to use an AO-X, it attaches directly on top of the

StarChaser SC-3 SHORT. Please consult the AO-X manual for details.

4. Attach the mounting plate from the camera to the top of the assembly. Be

sure to install the shims, if supplied, in the same locations relative to the

camera. If you are unsure of the correct locations, please refer to the Shim

Sheet included with the camera.

5. Connect the supplied DB-9 cable from the filter wheel’s connector to the

AUX connector on the camera. Be sure to tighten the thumbscrews on both

ends.

Dual Wheel Assembly

If you are planning on using the Dual Wheel option, you will need two identical

filter wheels, plus the AFW-DUAL Dual Filter Wheel Adapter.

The adapter comes with a customized cable, which allows you to connect two

wheels to the AUX port on the camera. One connector on the cable has a

specially designed low-profile back shell, which allows it to fit between the two

wheels with minimal impact on back focus distance.

AFW-DUAL Dual Filter Wheel Adapter

Installing dual wheels requires following the same steps as installing a single

wheel, except for a few additional steps. Please refer to the above instructions

as required.

1. Install the first wheel onto the camera normally.

2. Install the filters normally. Usually, the last slot in the wheel is left empty,

to allow filters in the second wheel to be used with no filter present in the

first wheel.

3. Install the lid normally.

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