18-03-2023 CaK 3933Å

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rsfoto
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18-03-2023 CaK 3933Å

Post by rsfoto »

Hi,

My best CaK SHG from today and then clouds rolled in. I am still not able to acquire the ser files at high speed because the mount has no good tracking speed.

I finally found out the blackouts of my USB 3.0 streaming and the culprit is the built in USB 3.0 hub from iOptron ... Sh...t They have a new internal Hub at a cost of about US $ 300.00 but this is the 3rd Hub they have built but I do not trust them anymore. I will throw in a single USB 3.0 cable through the mount ...


Image


also made some temeratures measurements agaín and it look like the cooler I made is capable of keeping the temperature at or even a bit under ambient temperature.

Session Start after a few minutes the camera reached 39.1°C
Image

some screenshots during the session. The focuser temperature is a sensor connected to the savaged ZWO EAF focuser, just hanging free in the air.

Image


Session end
Image

20230318_ASI_178MM_°C.JPG
20230318_ASI_178MM_°C.JPG (352.83 KiB) Viewed 1086 times
The whole cooler has a cost of about US $ 35.00 including my 3D printing cost as if I woud sell them. :mrgreen:

Parts are
W1209 temperature controller
40x40mm Heatsink with 110 fingers
TEC1-12706
WINSINN Fan 4010 12V
Jack for 5.5x2.1mm plug
3x printed parts
Miscelanous screws, brass inserts and some wires.
and some time for assembling
Last edited by rsfoto on Sun Mar 19, 2023 12:04 am, edited 4 times in total.


regards Rainer

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San Luis Potosi Mexico

North 22° West 101°
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Re: 18-03-2023 CaK 3933Å

Post by highfnum »

what is problem with temperature
?


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Re: 18-03-2023 CaK 3933Å

Post by rsfoto »

highfnum wrote: Sat Mar 18, 2023 11:22 pm what is problem with temperature
?
Hi highfnum,

No problem at all. Some time ago this was discussed and based on that and having time and to get rid of boredom I started with somje designs, printed them and then it started to develop until I reached this point with the sandwiched TEC.

A forum member from Australia also played with coolers, specially a Black Shark cooler. https://tinyurl.com/BlackSharkCool

viewtopic.php?f=32&p=371542#p371542

So, no problem, but interesting to see what is achievable with a bit of imagination and a 3D printer ...

I would dare to say my cooler is more effective then the Black Shark until somebody proofs me I am wrong :lol:

Having fun that is all.
Last edited by rsfoto on Sat Mar 18, 2023 11:54 pm, edited 1 time in total.


regards Rainer

Observatorio Real de 14
San Luis Potosi Mexico

North 22° West 101°
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Re: 18-03-2023 CaK 3933Å

Post by thesmiths »

The Calcium image is quite good. What is the focal ratio? I have found the results improve if to mask the aperture to f/10.

USB hubs are be problematic. Best to connect directly to the computer with 3m limitation for the most important connections.

That is a really impressive temperature reduction. Have you taken apart the camera yet to see how thermal connection is made inside?


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Re: 18-03-2023 CaK 3933Å

Post by rsfoto »

thesmiths wrote: Sat Mar 18, 2023 11:40 pm The Calcium image is quite good. What is the focal ratio? I have found the results improve if to mask the aperture to f/10.

USB hubs are be problematic. Best to connect directly to the computer with 3m limitation for the most important connections.

That is a really impressive temperature reduction. Have you taken apart the camera yet to see how thermal connection is made inside?
Hi Doug,

Thanks. At the moment I have an f/5.85. 240mm focal length and UV/IR filter aperture is 41mm. I have some aperture stops which I can test tomorrow if it is Sunny.

Thanks for the cooling system comment. No. I have not yet opened the ASI 178MM but on the next opportunity I can check it. My thinking was that if the inner air inside the housing is cool the chip will also run cool. The measured temperature comes from the internal camera temperature sensor. I do not know where it is located.

Already thinking in making a part which connects the back side of the chip to the inside housing.


regards Rainer

Observatorio Real de 14
San Luis Potosi Mexico

North 22° West 101°
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Re: 18-03-2023 CaK 3933Å

Post by marktownley »

Very nice Rainer!

Stopping down any lens when working at 393 helps.


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Re: 18-03-2023 CaK 3933Å

Post by Montana »

Nearly a textbook image Rainer :bow :hamster: I am so happy all of this is working well now :)

Alexandra


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Re: 18-03-2023 CaK 3933Å

Post by Alun_H »

Great result Rainer.

I have the CEM60 and had problems with the USB 2 hub by way of always dropping connections so I ripped it out of the mount along with all the onboard wiring. I got a project box and installed the hub in to it thinking I use it off the mount and the thing still don't work. As you say absolute waste of time,it all went in the bin!

Alun


Lunt 50THa solar scope
Lunt CaK B12 module
SW Evostar 72ED for full disk imaging
Sol'Ex SHG
80mm f/7 achromat used with pressure tune module off the Lunt with Lunt 100mm ERF
Bresser 90 f/10 achromat used for CaK & white light imaging & PST mod with Lunt 100mm ERF
Coronado SM40 (pre Meade) and BF10 filter set + SMII 60 richview DS etalon
Skywatcher EQ6 Pro and Ioptron CEM60
Then there is all the night kit which is far too long a list to write up here! :lol:
More images on view on my Flickr page...https://www.flickr.com/photos/alun_h/
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