AM5 belts: Page 2 - ZWO User Forum

AM5 belts

Kevin_A

w7ay i have 4 Sunon fans, 3x40mm and 1x50mm. Of the 3x40mm fans there is one that is much less in terms of vibration which came as a replacement fan for my 183 which was initially really bad.
They all have a lot of air movement and that is why I started looking at the heat sink vibrating. I am very impressed with the cfm of the 40mm. The 50mm shakes like a beast and I hope that the Fractal 50mm will be much better when it arrives from Austria. So far I cannot even tell that the new 40mm fans are running in my 533 and 183 as they are silent and zero vibration. Just as long as they can achieve the -10c I require it will be a win. There is a big area in the 2600 for trying other gear. I might end up making my own gasket as I have a 12” sheet…. Just not sure until I test if isolation is necessary with a smoother running fan. Time will tell!

w7ay

Kevin_A Just not sure until I test if isolation is necessary with a smoother running fan.

I might get this app:

https://apps.apple.com/us/app/vibration/id301097580

Chen

Kevin_A

w7ay

mf50101v2-1000c-a99.pdf

645kB

Kevin_A

w7ay most gaskets are just rubber or silicone rubber for sealing purposes.

Kevin_A

w7ay the fractal fan is only 6.8 cfm at 3500 rpm and 19db nowhere near the 11 cfm/4500 rpm at 25.6 db noise level.

Kevin_A

w7ay I am curious to know how much any vibration adds to actual star size!

Kevin_A

w7ay Chen, am I correct to assume that the zwo camera fans always run at a fixed maximum rpm? I am not up to date on camera Peltier cooling system fans.

w7ay

Kevin_A I am curious to know how much any vibration adds to actual star size!

If the HFD of a star is about 3 arcsec, and assuming (probably good assumption) that fan vibration is independent of atmospheric turbulence, the star should bloat to sqrt( 33 + xx ) in the direction of vibration. Where x is the deflection in arcseconds.

I just downloaded this to try on a cloudy night:

Mesuring before and after vibration mitigation is the only objective way, plus the app should be able to predict the amount of vibration.

Notice the example shows them measuring a computer fan :-)

Chen

w7ay

Kevin_A Chen, am I correct to assume that the zwo camera fans always run at a fixed maximum rpm?

Appears that way. We just need to look at it by changing the setpoint to see if the fan actually turns itself completely off when the setpoint is achieved. I don't think so, since a Peltier still generates significant heat that is a function of ∆T.

Chen

w7ay

w7ay the star should bloat to sqrt( 33 + xx )

Stupid forum app thinks I am using an asterisk (multiplication) to indicate italicization.

The above should read sqrt( 3 . 3 + x . x ).

Chen

Kevin_A

w7ay i think it just runs and runs….

mikenoname

What does any of this have to do with AM5 belts?

You two are masters of taking threads OT. LOL

Kevin_A

mikenoname we get carried away. Haha but then again…. I started the thread so you cant say I hijacked it! Haha

Kevin_A

mikenoname I was actually going to start a new thread on the fans… but if you read it all… it is all good stuff anyways and relevant to getting better results.

tempus

Kevin_A Kevin, any movement on the belts from ZWO?

Kevin_A

tempus nada for over a week. I took my mount covers off and if there is a belt issue I cannot see it. No skipping, backlash or belt tracking issues so I am leaning towards software/ firmware issues.

ASIMount@ZWO

Kevin_A Did you contact support's email to get the test version link of ASIAIR?

Kevin_A

ASIMount@ZWO no as I am waiting for a reply or a link to be provided. I have now sent a request.

vladi

I just got to this thread and realized that I actually have the same effect: the guiding is much better with large and heavy scopes, like RC8 and Esprit 100ED, and stays around 0.7-0.8 with lighter ones.
I hope that @Tech@ZWO would also answer here.

Kevin_A

vladi it actually might not be belt related but rather the heavier scopes keeping the gears meshed better. I checked my belts out and they do not seem to have any play or issues.
I am going to be testing out a beta release for asiair that has changed the minmo and see how it reacts. My scopes are all under 644mm and may respond better to a larger minmo but in general strainwave gears like smaller… so who knows.

BenBret-1

Kevin_A Any news from ZWO since, and is there any improvements with the beta software ?

I'm also getting hard time guiding below .5 but jumping very often around .7+, and i'm also getting spikes like you explained before but mostly on the RA axis. ( perrfect weather and no wind, and my polar alignment is dead on )

I Tested different combinaisons of guiding settings, but still getting inconsistent results.

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