iOptron SMARTSTAR IEQ75-GTTM User Manual

Loading...

SmartStar® iEQ75-GTTM

Instruction Manual

Table of Content

Table of Content .................................................................................................................................................

2

1. iEQ75-GTTM Overview ..................................................................................................................................

4

2. iEQ75-GTTM Assembly ..................................................................................................................................

5

2.1. Parts List..................................................................................................................................................

5

2.2. Assembly terms .......................................................................................................................................

7

2.3. iEQ75-GTTM Ports...................................................................................................................................

8

2.4. Introduction .............................................................................................................................................

8

2.5. iEQ75-GT Assembly ...............................................................................................................................

9

3. GoToNova® 8406 Hand Controller..............................................................................................................

16

3.1. Key Description.....................................................................................................................................

16

3.2. The LCD Screen ....................................................................................................................................

17

4. Getting Started..............................................................................................................................................

18

4.1. Setup the Mount and Polar Alignment ..................................................................................................

18

4.2. Manual Operation of the Mount ............................................................................................................

18

4.3. Setting Up the Hand Controller.............................................................................................................

18

4.3.1. Set Up Local Time..........................................................................................................................

18

4.3.2. Set Up Observation Site .................................................................................................................

19

4.3.3. Set N/S Hemisphere .......................................................................................................................

20

4.3.4. Initial Star Alignment .....................................................................................................................

20

4.3.5. Go to the Moon...............................................................................................................................

20

4.4. Turn Off the Mount ...............................................................................................................................

21

5. Complete Functions of GoToNova® Hand Controller .................................................................................

22

5.1. Slew to an Object...................................................................................................................................

22

5.1.1. Planets, Sun, Moon.........................................................................................................................

22

5.1.2. Deep sky objects.............................................................................................................................

22

5.1.3. Comets............................................................................................................................................

22

5.1.4. Asteroids.........................................................................................................................................

22

5.1.5. Stars:...............................................................................................................................................

22

5.1.6. Constellations .................................................................................................................................

23

5.1.7. Enter R.A. DEC..............................................................................................................................

23

5.2. Sync to Target........................................................................................................................................

23

5.3. Electric Focuser .....................................................................................................................................

23

5.4. Set Up Controller...................................................................................................................................

23

5.4.1. Set Up Local Time..........................................................................................................................

23

5.4.2. Set Up Observation Site .................................................................................................................

23

5.4.3. Set N/S Hemisphere .......................................................................................................................

23

5.4.4. Set Display Contrast .......................................................................................................................

23

5.4.5. Set Eyepiece Light..........................................................................................................................

23

5.4.6. Set Backlight ..................................................................................................................................

23

5.4.7. Set Backlash Value.........................................................................................................................

24

5.4.8. Set Key Beep ..................................................................................................................................

24

5.4.9. Reset All .........................................................................................................................................

24

5.4.10. Meridian Protection ......................................................................................................................

24

5.4.11. Set Language ................................................................................................................................

25

5.4.12. Heating Controller ........................................................................................................................

25

5.4.13. Upgrade Firmware........................................................................................................................

25

5.4.14. Firmware Version.........................................................................................................................

25

5.4.15. Set Speed Limit ............................................................................................................................

25

2

 

5.5. Align ......................................................................................................................................................

25

5.5.1. One-Star Align................................................................................................................................

25

5.5.2. Two-Star Align...............................................................................................................................

25

5.5.3. Dis R.A axis error...........................................................................................................................

26

5.5.4. Polaris Position...............................................................................................................................

26

5.6. PEC Option............................................................................................................................................

26

5.7. Set Up Tracking.....................................................................................................................................

26

5.8. Auto Guide ............................................................................................................................................

26

5.8.1. Set Guider Rate...............................................................................................................................

26

5.8.2. Set Guider Direction.......................................................................................................................

26

5.9. Park Scope .............................................................................................................................................

27

5.9.1. Park Scope ......................................................................................................................................

27

5.9.2. Set Park Position.............................................................................................................................

27

5.10. To Zero Position..................................................................................................................................

27

6. Maintenance and Servicing ..........................................................................................................................

28

6.1. Maintenance ..........................................................................................................................................

28

6.2. iOptron Customer Service .....................................................................................................................

28

6.3. Product End of Life Disposal Instructions ............................................................................................

28

6.4. Battery Replacement and Disposal Instructions....................................................................................

28

Appendix A. Technical Specifications .............................................................................................................

29

Appendix B. GoToNova® 8406 HC MENU STRUCTURE............................................................................

30

Appendix C. Firmware Upgrade ......................................................................................................................

32

Appendix D. Use a PC to Control an iEQ75-GT Mount..................................................................................

33

Appendix E. GoToNova® Star List ..................................................................................................................

34

IOPTRON TWO YEAR TELESCOPE, MOUNT, AND CONTROLLER WARRANTY............................

41

WARNING!

NEVER USE A TELESCOPE TO LOOK AT THE SUN WITHOUT A PROPER FILTER! Looking at or near the Sun will cause instant and irreversible damage to your eye. Children should always have adult supervision while observing.

3

1. iEQ75-GTTM Overview

The iEQ75-GT™ is a one-of-a-kind premium CNC-machined astro-imaging mount from iOptron. The iEQ75-GT™ offers the next generation GoTo technology from iOptron. With a Renishaw high resolution encoder-enabled double closed-loop tracking, the system is able to tracking the target with a tracking error less that ±1 arcsec. The iEQ75-GT™ has a payload of 75 lb (34 kg) and includes a calibrated dark field illumination polar scope. Its unique base design makes it easy for just one person to carry to location.

Features:

Premium CNC-machined astrophotography mount suited for advanced imaging

Heavy duty German equatorial mount

Maximum payload: 75 lb (34 kg) (excluding counterweight)

Mount weight: 52 lb (23.6 kg)

Angular contact ball bearings for R.A and DEC axles, as well as worm gear shafts

Precision DC servo motor-driven and double closed-loop tracking with Renishaw high resolution encoder feedback

32-bit ARM system for ultra-accurate tracking with temperature-compensated crystal oscillator (TCXO)

Maximum tracking error: ± 1 arc second

Advanced GOTONOVA® technology for accurate GOTO and tracking

Built-in 32-channel Global Positioning System (GPS)

Integrated ST-4 autoguiding port capable of reverse guiding with auto-protection

Hand Box (HBX) port for hand controller connection

iOptron port for electronic focuser, laser pointer, planetary dome control

RS232 port for firmware upgrading and computer control via ASCOM platform

Calibrated polar scope with dark-field illumination and easy polar alignment procedure, allowing for fast and accurate polar alignment

Heated hand controller for low temperature operation as low as -20ºC

Comes standard with:

o a mounting plate for Vixen or Losmandy-D saddles o a Vixen dovetail saddle

o stainless steel counterweight shaft with safety lock o 2 x 16.5 lb (7.5 kg) stainless steel counterweights o 12V DC car plug adaptor

o USB cable

oRS232 Cable

Optional tripod or pier

4

2. iEQ75-GTTM Assembly

2.1. Parts List1

The parts comes with the iEQ75-GTTM order include an EQ mount (Figure 1), one mounting plate (Figure 2), 2 counterweights and an CW shaft (Figure 1). Other parts are, as shown in Figure 4, an 8406 hand controller, coiled hand controller cable, a Vixen dovetail saddle, R.A. and DEC cables, a dark field illuminating LED with cable, a 12V DC adapter cable with car lighter plug, a USB Cable, a RS232 cable, GPS antenna, a hex key set, 4 base mounting screws, and 8 M6X20 hex head screws

Figure 1. iEQ75-GT mount

Figure 2. Mounting plate

1 Actual contents may vary from time to time.

5

Figure 3. Counterweights and CW shaft

Figure 4. Included accessories

6

2.2. Assembly terms

DEC Unit

DEC DIN cable

Polar Axis Cover

R.A. Unit

CW Shaft

Counterweight (CW)

CW Safety Screw

Tripod Head

Tripod Spreader

Tripod Leg

Leg Lock Screw

Mounting plate

Main control box

Polar Scope Cover

Lat. Locking Screw

Azi. Adjust. Knob

8406 Hand Controller

Azi. Locking Screw

Alignment Peg

Tripod Lock

Figure 5. iEQ75-GT assembly terms (mount and optional tripod)

7

2.3. iEQ75-GTTM Ports

Figure 6. Ports on iEQ75-GTTM control box

R.A. and DEC motor: For connecting to R.A. and DEC driver unit

Power: Power switch

DC 12V: 12 volts DC power plug (center positive)

HBX (Hand Box): For connecting to the 8406 Hand Controller

iOptron port: For connecting to other iOptron accessories, such as an electronic focuser, a laser pointer, or a planetary dome control

RS232: Series port for ASCOM control and main board firmware upgrade

Autoguide: Autoguiding port for ST-4 compatible guiding cameras

GPS: GPS antenna connection

Reticle: Power supply for the Polar Scope dark field illumination LED

2.4.Introduction

You have just purchased a telescope mount that is capable of taking you to a new level of astronomy. No matter which telescope or optical tube assembly (OTA) you select to install on the mount, the overall performance will be greatly enhanced. In order for you to get the optimum performance from the mount and OTA combination, you must assemble and adjust the mount correctly. The following fundamentals of telescope mounts are included to help you understand the big picture before you get into the specific details of the iEQ75-GT mount.

Telescope mounts are either equatorial mounts or altitude-azimuth (Alt-Az) mounts. Both types of mounts rotate the OTA around two perpendicular axes to point to a desired object in the night sky. An equatorial mount has the right ascension (R.A.) axis aligned with the celestial North Pole (CNP), or celestial South Pole (CSP), to provide rotation matching the celestial sphere rotation around the Earth and the declination axis (DEC) to provide elevation relative to the celestial equator. Since all celestial objects appear to rotate around the CNP, the R.A. axis allows the OTA to rotate with the celestial sphere and provide accurate tracking for visual observations and astrophotography. R.A. is the celestial equivalent of longitude. Like longitude, R.A. measures an angle that increases toward the East as measured from a zero reference point on the celestial equator. An Alt-Az mount has a horizontal axis to provide vertical (altitude) OTA movement from the local horizon and a vertical axis to provide horizontal (azimuth) OTA movement, similar to compass headings. An Alt-Az mount can provide tracking that is good enough for visual observing

8

and short exposure photos, but not good enough for serious astrophotography. Alt-Az mounts require star alignments for the OTA to track stars and they do not have adjustment components on the mount. Equatorial mounts require alignment of the mount components as well as star alignments for accurate OTA tracking.

In order to provide the required Polar Axis alignment, equatorial mounts use a combination of both mount types described above. The adjustable part of the mount moves in the Alt-Az mode in order to align the R.A. axis, also known as the mount’s Polar Axis, with the CNP. These Polar Axis adjustments do not involve any rotations of the OTA about the R.A. or DEC axes and can be performed without the OTA installed. The first step is to make an approximate azimuth alignment of the Polar Axis by aligning the specified tripod leg or reference point toward True North using a compass for reference (you must allow for the variation between True and Magnetic North at your location). Precise horizontal alignment of the Polar Axis is accomplished with azimuth adjustments on the mount. The second step is to adjust the Polar Axis vertically (altitude) above the North horizon by setting the observer’s latitude on the provided latitude scale. This procedure is based on the fundamental geometry of the Earth’s coordinate system in conjunction with the concept of the celestial sphere. You can verify this by visualizing yourself at the North Pole (latitude N90°) and Polaris will be 90° from the horizon, or directly overhead. These steps will place the Polar Axis very close to the CNP. Both of the above adjustments can be enhanced by the use of an opening along the R.A. axis that allows direct viewing of the North Star and the use of a polar scope to view through this opening. If you are going to get the most out of your equatorial mount it is essential to understand the concept of the Polar Axis and how the equatorial mount helps you establish and maintain a true Polar Axis alignment. Now, you are ready to perform star alignments using the equatorial mount’s electronic controller and enjoy the night sky.

The iEQ75-GT is a next-generation equatorial mount that provides the precision alignment capabilities required for today’s complete astronomy solution. The following sections of this manual provide the detailed steps required to successfully set up and operate the iEQ75-GT.

2.5. iEQ75-GT Assembly

NOTE: The iEQ75-GT is a precision astronomical instrument. It is highly recommended that you read the entire manual and become familiar with the nomenclature and function of all components before starting the assembly.

STEP 1. Setup Tripod

Expand the tripod legs and install the Tripod Support using the Tripod Lock as shown in Figure 7. Tightening the Tripod Lock will expand the tripod legs fully and provide maximum support for the mount and the Optical Tube Assembly (OTA). Adjust the tripod height by unlocking the tripod Leg Lock Screws, sliding the lower tripod leg to the desired length, and relocking the tripod Leg Lock Screws. It is recommended that you extend the legs fully during the first assembly and modify the length as required in subsequent adjustments. After the legs are adjusted and locked, stand the tripod with the Alignment Peg facing True South. If you are located in the southern hemisphere, face the Alignment Peg True North.

STEP 2. Attach the iEQ75-GT Mount

Locate the Azimuth Adjustment Knobs and retract them to allow enough clearance for the mount to fit on the tripod head. Unscrew the four (4) Azimuth Locking Screws shown in Figure 8. Place the mount onto the Tripod Head with the alignment notch on top of the Alignment Peg. Place the four (4) Azimuth Locking Screws back and tighten the screws. Level the tripod base by adjusting the individual legs. You need a level to check leveling.

9

Figure 7. Tripod

Figure 8. Attaching the mount

STEP 3. Connect Cables

Figure 9. Cable connections

There are two DIN 6 cables that have C091 connectors on both ends of the cable. Insert one end of the DIN 6 cable into the R.A. socket on the control box, and the other end into the socket located on R.A. driver unit, as shown in Figure 9. Secure both ends of the DIN 6 cable. Connect another DIN 6 cable between the DEC socket on the control box and the DEC socket on DEC driver unit. Attach the DIN 6 end of a DIN-RJ-11 cable into the HBX socket on the control box and the RJ-11 end into the hand controller. Connect the GPS antenna into the GPS socket on the control box. Plug the 12V DC power supply (center positive) into the Power socket on the control box. The back light of the hand controller will illuminate when the power switch is turned on.

STEP 4. Set the Location Latitude

This step requires you to know the latitude of your current location. This can be found from your 8406 hand controller after the embedded GPS receives the signal from the satellites. It also can be easily found on the Internet, with your GPS navigator or a GPS capable cell phone. You will have to change this latitude setting every time you significantly change your night sky viewing location.

10

Lat. Adjust. Lever

Azi. Adjust. Knob

Latitude Adjustment Knob

Figure 10. Adjust latitude

Unscrew the Latitude Adjustment Lever from the Latitude Adjustment Knob as shown in Figure 10. Turn the Latitude Adjustment Knob to set your current latitude, using the Latitude Adjustment Lever for a fine adjustment, if needed. At this point, with the mount level and pointed North, and the latitude set, the Polar Axis (R.A. axis) should be pointing very close to the NCP and Polaris.

CAUTION: For safety reasons, always adjust the latitude without an OTA and/or counterweights installed. Also, it is much easier to make this precise adjustment without a load on the axis being adjusted.

STEP 5. Polar Alignment

As explained in the introduction, an equatorial mount must have an accurate polar axis alignment in order to track properly. With the iOptron innovative Polar Scope and Quick Polar Alignment procedure, you can do a fast and accurate polar axis alignment.

Figure 11. Polar Scope Dial

As indicated in Figure 11, the Polar Scope Dial has been divided into 12 hours along the angular direction with half-hour tics. There are 2 groups, 6 concentric circles marked from 36’ to 44’ and 60’ to 70’, respectively. The 36’ to 44’ concentric circles are used for polar alignment in northern hemisphere using Polaris. While the 60’ to 70’ circles are used for polar alignment in southern hemisphere using Sigma Octantis.

Polar axis adjustments

Whenever polar axis adjustments are required, loosen the four Azimuth Locking Screws and adjust the Azimuth Adjustment Knobs to do a fine adjustment of the mount in the azimuth direction. Tighten

11

the locking screws to secure the mount. Loosen four Latitude Locking Screws on the side of the mount, turning the Latitude Adjustment Knob to adjust the latitude (altitude). Use the Lever for a fine latitude adjustment. Re-tighten the lock screws.

Initializing the polar scope

During initial setup of the iEQ mount, it is likely that the viewing hole on the DEC axis of the polar scope may be blocked by the DEC axle. The Polar Scope Dial in the polar scope should be set at the normal clock position with 12 o’clock located at the top, as shown in Figure 11. Before doing the Quick Polar Axis Alignment, complete the following steps:

(1)Take off both the Polar Axis Cover and the Polar Scope Cover from the mount.

(2)Thread the dark field illuminating LED end into the threaded hole and plug the other end into the Reticle socket located on the control box (Figure 12). The illumination intensity can be adjusted using the hand controller (HC) via the “Set Eyepiece Light” function under the “Set Up Controller” menu.

(3)Use the UP or DOWN button to turn the DEC axle if it blocks the Polar Scope view, press number buttons to change the slew speed.

(4)If the 12 o’clock of the Polar Scope dial is not at the top, as shown in Figure 11, rotate it using HC’s LEFT or RIGHT button.

Figure 12. Connect the illumination LED to Polar Scope

NOTE: Do not disassemble the Polar Scope to rotate it. It is adjusted at the factory and can be misaligned if you disassemble it. A good Polar alignment is the basis for good GOTO and tracking performance.

Quick polar axis alignment

(1)Turn on the mount power by pressing the On/Off switch on the R.A. unit. After “GPS OK” is shown in the upper right corner of the HC, the LCD will display the Polaris Position as shown in Figure 13 (a). If you are practicing inside or when there is no GPS signal, you can view this chart by pressing the MENU button, then select “Align” and “Polaris Position”. For example, on May 30, 2010, 20:00:00 in Boston, US (Lat N42º30’32” and Long W71º08’50”), 300 min behind UT, the Polaris Position is 1hr 26.8m and r= 41.5m, as shown in Figure 13 (a).

(2)Look through the polar scope; make sure the polar scope is not blocked by the DEC axle. The 12 o’clock indicator of the Polar Scope Dial must be positioned on top.

(3)Follow the Polar axis adjustment procedure (not the hand controller) to adjust the mount in altitude (latitude) and azimuth (heading) direction and place Polaris in the same position on the

12

Polar Scope Dial as indicated on the HC LCD. In this case, the Polaris will be located at a radius of 41.5’ and an angle of 1 hour 26.8 minute, as shown in Figure 13 (b).

(a)

(b)

Figure 13. Polaris displayed on 8406 hand controller (a) and Polaris located on Polar scope dial

STEP 4. Attach Dovetail Adapter

Install the Mounting Plate onto the iEQ75-GT mount. Both Vixen (included) and Losmandy-D dovetail saddles can be used. The mounting-hole distribution on the Mount Plate is shown in Figure 14.

Figure 14. The mounting-hole distribution on the Mount Plate

STEP 7. Install Counterweight(s)

iEQ75-GT comes with two 16.5 lb (7.5 kg) stainless steel counterweights (CWs). Use one or both CWs as required for your particular OTA. Additional CW(s) may be needed to balance a heavier OTA (Optional CWs are available from iOptron).

CSUTION: The mount must be at the zero position when the counterweights are being installed. The Zero Position is the position with the CW shaft pointing toward the ground, as shown in Figure 15. Use your hand controller to move the mount.

13

+ 28 hidden pages