Grimaldi replied to the topic 'Need help for rotator project' in the forum. 4 weeks ago

From the Fritzing drawing here: create.arduino.cc/projecthub/ryanchan/ho...-motor-driver-b124c5 you can see DC motors with 2 pins driven, with 4 wires connected to the L298N driver board.

Nema17 are usually driven by A4988 stepsticks like shown here: ardufocus.com/manual/build-instructions/, with 4 wires connecting motor and step stick.

So are Nema17 compatible to L298N?

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Grimaldi replied to the topic 'Astroberry + QHYCCD users' in the forum. 1 month ago

Qhy cams have been updated in latest indi (git). I believe it‘ll take some time until either Raspian or Radek update repositories :-)

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Grimaldi replied to the topic 'KSTARS cross compiling manual' in the forum. 1 month ago

sudo apt install libkf5doctools-dev

Should solve this, I assume…

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Grimaldi replied to the topic 'Internal Solver stopped working' in the forum. 2 months ago

Two buttons in settings reset them (yellow in screen shot):

  1. the „down caret“ resetting 
  2. and the button in bottom left
Did you try them already? 
If that fails, replace ~/.local/share/kstars/SavedAlignProfiles.ini with a known good version.

 

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I compiled Kstars and indi from scratch on Ubuntu 20.04, using indi 1.9.1.
I started an only simulators profile:
 



Then when in Align module I get the following behaviour:

Goal: Find the position/centre coordinates of a picture taken before.
  1. I switch to mode „Sync“
  2. Then Load&Slew my picture
  3. the Solver runs, finds coordinates, updates mount position and then
  4. The alignment module switches to „Slew to target“ mode
  5. aquires an image
  6. due to wrong exposure settings fails
expected behaviour is: 
4. stop

Rationale: If „sync“ is selected, the telescope should already be „pointing“ at that patch in sky. 

See Log here:
​​​​​​​​​​​​​​​​​​ 

 

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I compiled Kstars and indi from scratch on Ubuntu 20.04, using indi 1.9.1.
I started an only simulators profile:
 



Then when in Align module I get the following behaviour:

Goal: Find the position/centre coordinates of a picture taken before.
  1. I switch to mode „Sync“
  2. Then Load&Slew my picture
  3. the Solver runs, finds coordinates, updates mount position and then
  4. The alignment module switches to „Slew to target“ mode
  5. aquires an image
  6. due to wrong exposure settings fails
expected behaviour is: 
4. stop

Rationale: If „sync“ is selected, the telescope should already be „pointing“ at that patch in sky. 

See Log here:
​​​​​​​​​​​​​​​​​​​​​​​​​ 

 

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Grimaldi replied to the topic 'Roll back to 1.8.9' in the forum. 2 months ago

If all else fails, look at what your distribution has, download them manually and use dpkg to install. (Debian has 1.8.8 for example)

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The guide camera should roughly be pointing at the same patch of sky as your main cam. A few arcmin/arcsec offset does not matter, as long as the mechanical connection between the cams is stiff enough and does not change too much with the moving mount and changing temperature. YMMV.

The guiding keeps the stars on the same position on the guiding cam sensor (average). Small rotations around that set-up can still happen and can become „large“ if your main cam is pointing somewhere else, as we are talking a few micron for a pixel. For large focal lengths and large equipment an off-axis guider can become necessary as the weight and flexure may become so large, that you cannot neglect it anymore and need guide cam and main cam use the same optical train, to correct for deviations caused by these.

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In hindsight and with-out being able to prove it, I believe the key to get it working was in the „Align Options Profiles Editor“ to click on the „down circumflex“ to discard custom settings. See screen shot 

 


]
 

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Thanks Hy, I was more looking into how to get the rig running fast, as one of the rare clear sky nights is happening. If necessary I will get into git and recompiling. I am determined to get it running.

Now 5 seconds ago, while I am typing, a solve happened and the mount moved!

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