Hi!

Great, thanks!

My setup: this is for a C8 with a Moonlite focuser, on which I have attached a stepper motor directly to the focusing shaft (not the microfocuser). My current stepper motor seems to have given up (it's almost 10 years old) so I'm thinking on replacing it. And I've been using a DIY MyFocuserPro box to control it. If I get rid of the control-box, the setup is simpler. And I can now choose which stepper motor to use. Currently, I have 2 steppers lying around: one NEMA 17 wiith no gearbox and one with a 5:1 planetary gearbox. I guess the one with the gearbox is what I need now.

I can freely choose the connectors, and if I use a 1,5 - 2 m cable, I can place my Raspberry below the mount, where I prefer to have it. On my other focusers, I have DB9 connectors, which makes it easy to switch. I like the RJ11 connectors, light and easy, but somehow trust the DB9 more even though bulkier.

Your box looks nice, Kevin - 3D-printed? If so, would you consider sharing the files?

Magnus

Magnus

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Hi!

Thanks, clarifying.

However, microstepping: Is my HAT now, when I have not done anything but install it, doing microstepping with 1/32 steps? Because it looks like it does FULL steps.

Magnus

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Hi!

Thanks, Andrew!!
As for the cable: 6 feet sounds good - translates to some 180 cm in Europe, right? :) How do you connect it to the board then? Right now I'm using the white connector (don't know the name of it) but I can't make any of those myself, for an extension cable.

And thanks for the advice on the board! In the Indi panel, there is an option for "Original" or "2.1" version of board. Setting it to 2.1 made the motor stop (the very low) buzzing and suddenly it moves! Great!!!

But: no coil power - how does it then hold the position? On all my 3 previous DIY stepper motor focusers, I have used an option for "coil power" to hold the focuser in position.

Secondly: I cen see in this thread that others have asked about the microstepping, and I really do not get it. I seem to get full steps - 200 makes a full rotation (360 degrees), which is far less than the 1/32 microstep should do. So how does this really work?

If I want to change the microstepping - would need to solder the resistors (according to the description of the HAT), right? And then set the DIP switches AND adjust the driver? (I'll try to aviod this but good to know)

Magnus

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Hi!

And a problem: I have installed the Waveshare Hat on my R-Pi 4, running SM 1.7.4. Followed the instruction on Github, to download and build the driver, and I can now find the Wavehat Motor HAT Focuser in Ekos, and connect to it. Everything looks good, so far. However, I can not find a setting for adjusting microstepping in Indi window - should there not be one?
The problem: the stepper motor does not move at all. WHen starting the indiserver via Ekos, there is a faint click in the motor. Some other very faint ticks, but nothing else. It becomes warm after a while so seemingly getting power.

I saw there were issues with gpio permissions before. Not sure though what I should check to understand that - as I understood it from far earlier in this thread, it was fixed.
So what can I do? What to check and change? (I am not a coder nor an electrical engineer, but farily good with a multimeter and a soldering iron).

Magnus

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Hi!

Following up on this, as I'm in the process of re-arranging my stuff: How far from the motor can you place the R-Pi wit the HAT? I would prefer to have my R-Pi below the whole mount, as I find that when it sits on top of the OTA, that seems to result in weaker wifi signal (OTA is metallic). Placing the R-Pi below the mount means I need a powered USB-hub, but that is good anyway, but how can I handle the cables for the stepper motor...? All ideas welcome!

Magnus

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Hi!

I know this should be easy and I've done it before but can not figure out now:

I am now using 2 Raspberries, for 2 cameras on the same mount. I raspberry per camera (and telescope). So I need to connect Raspberry 2 to the same mount as Raspberry 1.

So in the Profile editor, I do not choose a mount, but in the place for Remote I type: indi_celestron_nexstar@<ipnumber-of-Raspberry1>

But that does not work. What am I missing?

Magnus

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Magnus Larsson replied to the topic 'Ekos Optical Trains' in the forum. 1 month ago

Hi!

I've been talking to Jasem and it seems he has fixed the issue - though I'm still not clear what it is all about.

The point about plate solving was/is my hypothesis that since optical trains are separate, maybe the main camera train is not "aware" of the plate solving data. Which again is odd since that is related to mount, not camera. So just an attempt to make sense of it all.

I'll post my optical trains later.

Magnus

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Magnus Larsson replied to the topic 'Ekos Optical Trains' in the forum. 1 month ago

Hi!

I'm also doing spectroscopy. My main camera does not do any plate solving. And I do not get DATE-OBS in the fits headers. At least I did not last night. Below is a header.

Magnus

SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 1391 / length of data axis 1
NAXIS2 = 1039 / length of data axis 2
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
BZERO = 32768 / offset data range to that of unsigned short
BSCALE = 1 / default scaling factor
ROWORDER= 'TOP-DOWN' / Row Order
INSTRUME= 'Atik 314L' / CCD Name
TELESCOP= 'Celestron NexStar' / Telescope name
OBSERVER= 'Unknown ' / Observer name
OBJECT = 'HD208501' / Object name
EXPTIME = 4.500000E+01 / Total Exposure Time (s)
CCD-TEMP= -1.502E+01 / CCD Temperature (Celsius)
PIXSIZE1= 6.450000E+00 / Pixel Size 1 (microns)
PIXSIZE2= 6.450000E+00 / Pixel Size 2 (microns)
XBINNING= 1 / Binning factor in width
YBINNING= 1 / Binning factor in height
XPIXSZ = 6.450000E+00 / X binned pixel size in microns
YPIXSZ = 6.450000E+00 / Y binned pixel size in microns
FRAME = 'Light ' / Frame Type
IMAGETYP= 'Light Frame' / Frame Type
FOCALLEN= 0.000E+00 / Focal Length (mm)
APTDIA = 0.000E+00 / Telescope diameter (mm)
FOCUSPOS= 735 / Focus position in steps
FOCUSTEM= 2.000E+01 / Focuser temperature in degrees C
END

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Hi!

Interesting! Can I use this not with a phone but with the regular CMOS camera as well, capable of taking videos? I already use that one for manual collimation.

Magnus

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Hi!

I'll try to explain my issue as simple as possible:
I'm doing spectroscopy. To center my object, I have a guidescope with a separate camera. This is the one doing plate solving.
Then my imaging camera sits on the spectroscope. This one does NOT plate-solve.
So I have 2 scopes, so to speak, with 2 camera. I have set up them as 2 image trains. Only common feature is the mount.
Not my issue:
Lately, seemingly since I upgrade to this version of Kstars where image trains is a feature, I no longer get date and CRVAl keywords in the fits header of my imaging camera. That makes sense to me -if we now consider that independent from my centeringscope/guidescope. But it becomes a real problem in processing the images, since atmospheric extinction is very important for spectroscopy.
So: is there a way for me to get these important keywords in images from BOTH cameras/both image trains? Maybe I can set up the centering image train in a way so that it does not become independent from the imaging camera....(but I can not figure out how). Or can I use some script to insert the keywords in some way? This is really a serious issue for this processing.....

And I can't say I understand the logic. One could think that since they share the same mount, information about where that mount is pointed (CRVAl keywords) should be inserted. And I don't understand why the date and time is not inserted anymore. The Fits header from one of my recent main camera images is here:

SIMPLE = T / file does conform to FITS standard
BITPIX = 16 / number of bits per data pixel
NAXIS = 2 / number of data axes
NAXIS1 = 695 / length of data axis 1
NAXIS2 = 519 / length of data axis 2
EXTEND = T / FITS dataset may contain extensions
COMMENT FITS (Flexible Image Transport System) format is defined in 'Astronomy
COMMENT and Astrophysics', volume 376, page 359; bibcode: 2001A&A...376..359H
BZERO = 32768 / offset data range to that of unsigned short
BSCALE = 1 / default scaling factor
ROWORDER= 'TOP-DOWN' / Row Order
INSTRUME= 'Atik 314L' / CCD Name
TELESCOP= 'Celestron NexStar' / Telescope name
OBSERVER= 'Unknown ' / Observer name
OBJECT = 'HD019445' / Object name
EXPTIME = 3.000000E+02 / Total Exposure Time (s)
CCD-TEMP= -1.502E+01 / CCD Temperature (Celsius)
PIXSIZE1= 6.450000E+00 / Pixel Size 1 (microns)
PIXSIZE2= 6.450000E+00 / Pixel Size 2 (microns)
XBINNING= 2 / Binning factor in width
YBINNING= 2 / Binning factor in height
XPIXSZ = 1.290000E+01 / X binned pixel size in microns
YPIXSZ = 1.290000E+01 / Y binned pixel size in microns
FRAME = 'Light ' / Frame Type
IMAGETYP= 'Light Frame' / Frame Type
FOCALLEN= 0.000E+00 / Focal Length (mm)
APTDIA = 0.000E+00 / Telescope diameter (mm)
FOCUSPOS= 1041 / Focus position in steps
FOCUSTEM= 2.000E+01 / Focuser temperature in degrees C
END


Magnus

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Ah, solved it. Found a Post by Kevin, saying he changed to another OT and then back, then it worked.

So I created a secondary "New train", identical to the first, changed to that, and controls were all back, then back to my Primary train, and controls are there again.

But this was not so when using simulators. Works here now, but might be good to know.

Magnus

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Hi!

I think the optical train is a good idea - however, I need to get used to it. Right now I have an issue I simply can not solve:

I have only one camera connected for the moment (configuring a spectroscope on the bench). So all I have configured is Telescope Simulator and my Atik camera. When I connect, the OT window pops up, and I make sure my Atik camera i choosen. I click on Close, and turn to the Capture tab (only thing I want to do is capture). But there everything is greyed out - see screenshot. What am I missing?

I'm running Stellarmate on a R-Pi.

Magnus

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Hi Radon!

So, I'd like to test this HAT-solution. Where do I find the driver for it? And is it correctly understood that I simply attach the HAT, start the Raspberry, load the driver, and it should work? No installation needed for the HAT itself? (not used HATs before).

Magnus

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