Username:

Password:

UKAI is moving to Facebook

Author Topic: Setting up guiding within Maxim DL V5  (Read 2081 times)

0 Members and 1 Guest are viewing this topic.

Offline psjshep

  • Database dude... for the last breath of UKAI
  • Administrator
  • Galactic Poster
  • *****
  • Posts: 10209
  • My god! It's full of stars.... just often enough!
    • Some astro Pics
Setting up guiding within Maxim DL V5
« on: 21:35:51, 15 May, 2016 »
After I have helped a number of people setup their guiding in Maxim, I thought I'd put together a few tips for those who might have a similar set of issues...

1. The 2 most common ways of guiding

a) ST4
  • This involves using a cable with RJ12 connectors (6 pins/wires) and connects the guide camera directly to a mount's "Guide" port.
  • The guiding software will typically be set to use the guider "relays" to control the mount - the guide camera actually sends the N,W,S & E signals to the mount via the ST4 cable
  • If you require to control the mount via a planetarium program, you will need a separate lead between the mount (typically RS232 connection) and the computer
b) ASCOM Pulsegude
  • This involves using the connection between the computer & the mount via a serial cable (RS232) & these days is a USB->Serial DB9 (9 pins) converter, & then a DB9 plus cable -> RJ9 to telescope (4 connectors)
  • The ASCOM telescope driver is typically a "Hub" - allows the sharing of any other ASCOM program wishing to access / control the mount including planatarium, guider, dome controller, etc.
  • Has one less cable when guiding as there is no need for an ST4 cable
  • The guiding software will typically be set to use the "Telescope" connection.
--------------------------------------------------------------------------
Web Images

Offline psjshep

  • Database dude... for the last breath of UKAI
  • Administrator
  • Galactic Poster
  • *****
  • Posts: 10209
  • My god! It's full of stars.... just often enough!
    • Some astro Pics
Setting up guiding within Maxim DL
« Reply #1 on: 21:36:47, 15 May, 2016 »
2. Setting up guider in Maxim
In Maxim, either guding solutions can be set as follows :

For ST4:
i) View -> Camera Control Window (or Ctrl-W)
ii) "Guide" tab -> Settings
iii) Autoguider Output Control via -> "Guider Relays"
--------------------------------------------------------------------------
Web Images

Offline psjshep

  • Database dude... for the last breath of UKAI
  • Administrator
  • Galactic Poster
  • *****
  • Posts: 10209
  • My god! It's full of stars.... just often enough!
    • Some astro Pics
Setting up guiding within Maxim DL
« Reply #2 on: 21:44:24, 15 May, 2016 »
For Ascom Pulseguide:

Make sure you are able to connect to your mount first, via the "Observatory Control Window"

i) View -> Observatory Control Window (or Ctrl T)
ii) Setup -> Options -> Choose
iii) Pick your mount type & whatever COM port is required to connect
iv) Once you have selected your mount, then click "connect" in the Observatory Control Window
--------------------------------------------------------------------------
Web Images

Offline psjshep

  • Database dude... for the last breath of UKAI
  • Administrator
  • Galactic Poster
  • *****
  • Posts: 10209
  • My god! It's full of stars.... just often enough!
    • Some astro Pics
Setting up guiding within Maxim DL
« Reply #3 on: 21:47:22, 15 May, 2016 »
Finally, in the Guide tab, set the guider control to the telescope :

i) View -> Camera Control Window (or Ctrl-W)
ii) "Guide" tab -> Settings
iii) Autoguider Output Control via -> "Telescope"
--------------------------------------------------------------------------
Web Images

Offline psjshep

  • Database dude... for the last breath of UKAI
  • Administrator
  • Galactic Poster
  • *****
  • Posts: 10209
  • My god! It's full of stars.... just often enough!
    • Some astro Pics
Setting up guiding within Maxim DL
« Reply #4 on: 22:04:39, 15 May, 2016 »
Finally, some tricks 'n' Tips :

- If you get the dreaded "Star moved < 5 pixels" during calibration, check the following :
  - You have set guiding via "Guider Relays" when using ST4, or "Telescope" when using ASCOM pulseguiding
  - the calibration time in X & Y is set to a high enough time in seconds to be able to make the guide star move > 5 pixels (sometime up to 25 seconds or more!)
     i) View -> Camera Control Window (or Ctrl-W)
    ii) "Guide" tab -> Settings -> "X Axis Cal time" & "Y Axis Cal time"
  - your backlash is one of the axis (typically Dec) is not so big as to have a huge time between reversing directions

- For calibrating the guide camera, make sure your exposure produces a reading on the guide star of at least 4000 ADU's (in a 16-bit camera) but less than 1/2 of whatever your camera's maximum is.
  - Too bright a star means it may be saturated or "blown out" & the guide algorithm in Maxim will not be able to accurately calculate the centre (or centroid) of the star
  - Too dim a star could mean that the star "disappears" from time to time from Maxim's star recognition


- For guiding, watch the guide graph to see what is happing during guiding
  - Star with both axis "Aggressiveness" set to 5 - 7
  - Try to figure out which is "RA" & "DEC" - typically, RA will be more active.
  - Trick : Set one of the guide "Aggressivenes" settings to zero (no guide corrections are sent) - for Dec, there should be very little movement but in one direction
  - If the RA graph is constantly moving above and then below the centre line, it is possible that your guiding is "Yo-Yo-ing" or over correcting. Reduce the "Aggressiveness" in that axis
    If it continues to bounce between + & - then possibly re-balancing your scope so that it has an east bias may help... a "perfectly" balanced scope is not the best for autoguiding.
  - On the graph, set the Vertical Scale to pixels & at most +2 pixels maximum. As guiding settles, set this is +1 or even +0.5  (see below)

  - If the axis is not correcting fast enough, increase the "Aggressiveness" in that axis
--------------------------------------------------------------------------
Web Images

 

ukbuysellRemote Imaging from AustraliaSharpSkyblank APTUKAI on Facebook
Powered by SMF 2.0.15 | SMF © 2006, Simple Machines LLC
DarkBreak by DzinerStudio. Theme modified by The UKAI Team

Page created in 0.161 seconds with 40 queries.
TinyPortal © 2005-2012