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Old 07-11-2018, 11:04 AM
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Stonius (Markus)
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Stonius is offline
Join Date: Mar 2015
Location: Melbourne
Posts: 1,077
Originally Posted by glend View Post
Markus, your problems may not be your laptop. What sort of camera are you using? The ZWO USB3 cameras are known for being very quirky in relation to cable length, USB drivers, etc. Are you using an extension cable, if so what sort? I would eliminate possible issues like these before assuming it's the laptop. Although there are some laptop USB drivers that should be changed, Sam from ZWO loaded some new drivers onto my laptop via a Teamviewer support session a couple of years ago.
Hmm that's interesting. I just bought a 2m USB3 extension cable, but haven't used it yet. Usually, the ASI290MM goes through a hub to my computer. The HDD is attached to the laptop's other USB port. It's a Thinkpad X1 from a couple of generations ago. I wonder if they've incorporated whatever they did with your drivers into the official drivers. Or if not whether they're generally available. I don't want to trouble support just yet until I've troubleshot (is that a word?) a bit more.

Originally Posted by Merlin66 View Post
I use Firecapture with both cameras, and , touch wood, have had no acquisition issues/ problems.
With a suitably sized ROI I can get >100fps easily.
Process in AS3! and Registax.
I can get up to 200 fps with High speed selected and the USB speed on max. Of course, it becomes more stable with High Speed turned off and USB speed reduced - which affects frame rates too. I still think the polling is the issue. It captures fine for maybe 4-5 seconds, pauses, captures fine for a few more seconds, pauses. Sometimes it just tells me the capture failed and quits. I guess the other possibility that it's writing to buffer and the HDD is too slow to keep up with the data writes.

Originally Posted by sil View Post
If you want a laptop for capture than damn well stick to making it for capture. You do NOT need it to be connected to the internet, you do NOT need antivirus and other garbage running in the background, you to not do anything else with it at all, ever. ideally. NO USB hubs, camera connected directly to USB 3, use a basic mouse as gaming mice do "polling" things that effect the system. have a dedicated SSD to record directly onto and a large external HDD to transfer to to move files to processing machine. dont install anything thats not essential, drivers for camera and firecap is all you need.
I wish I could have one laptop for Planetary, another for Deepsky and another for work, but it doesn't work that way. I take your points about turning off antivirus. Forgot about that one. I'll have a tweak and let you know if I come up with anything other than buying more memory or an SSD.

The USB speed setting does confuse me. Is it bandwidth? In which case you'd want more, right? even though the program warns you to set it lower if you have issues. But surely you can't be controlling the clock speed of the USB bus from software? I would have thought that is a BIOS level thing?

Anyway, thanks for the input, I'll keep you posted.

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