Re: Off Topic-NUC Computer
Thanks for the reply Dale. Replies in between the message below:toggle quoted messageShow quoted text
From: firstname.lastname@example.org <email@example.com> On Behalf Of Dale Ghent
Sent: Monday, July 12, 2021 2:14 PM
Subject: Re: [ap-gto] Off Topic-NUC Computer
Two things pop out at me:
1) You have a 1200GTO which lacks the through-mount cabling, which means any cables coming off your telescope will be suspended in air for some portion and would present snag hazards and each be subjected to repeated flexing and wear for some portion of their length.
****I have eliminated the clutch knobs and most of what could cause a snag, usually not an issue. Wires have been enclosed in a mesh material used for vehicle wiring bundles.*****
2) Gosh, that's a lot of POS (plain old serial)
My own instinct and from working with mounts that have both thru-mount cableways and not, is to minimize that run of cables to the telescope and not run individual cables for each device up there.
****My concern about mounting the NUC on the telescope is balancing. While it does help a good deal on the length of run and the rotation, it still may limit the use of say a piggyback scope, think my Stowaway, on the RC. My wiring solution was to wrap the wires in several bundles depending on where they needed to go. The USB and Serial cables are in conduit to the control room now, at the mount they are in smaller bundles depending is they rotate or are stationary.*****
On top of the scope, I would place a power pole hub and USB hub such as a StarTech 7-port model. I would run only one 12V and one USB cable from the NUC up to those devices. The powerpole hub would distribute power, and the USB hub would connect your USB devices and, for your devices which have only RS232 interfaces, USB to serial adapters for each. This the lightens the cable harness that comes off the telescope. Because you would use discrete USB to serial adaptors for your RS232 devices, you don't need to worry about having enough RS232 ports.
****Not sure about those USB to Serial adapters as I've heard of many causing issues or simply not working. For power I've been using an IP addressable power switch which allows me to power only those devices as needed. For instance I don't keep power on the flat panel unless it's being used. With the STL-11000 I've had issues where I needed to cycle power to the camera due to a filter wheel issue. If I start the camera and get the error message usually just a disconnect and reconnect or power cycle will clear it. Never found the cause of that issue but easily resolved.****
With all data devices on your telescope occupying only one USB port on your NUC, you can use a second USB port for the 4-port StarTech ICUSB23241. That can connect the dome, boltwood, CP backup, and flat panel. You'll then have USB ports to spare.
*****With the 1 USB and all data....these new CMOS chips send a ton of data for each frame so I'd be concerned with a single USB port handling all the USB traffic. What keeps it from bottlenecking? I haven't tested the serial device for multiple devices at this pint so not sure how that will handle the traffic as well****
I would not bother with trying to pipe the NUC's keyboard+mouse and HDMI video over to your warm room. It's already on a 1Gb network, so just use MS Remote Desktop to remote in from a laptop of desktop PC on the network. Your wired LAN and also have a WAP so you don't even need a hardwire network connection for your latop and can also use tablet PCs or iPads to remote into your NUC to run sessions.
***The only reason for keyboard and mouse would be needed tests while at the mount, monitor as well. Most all other needs can indeed be done remotely with Remote Desktop or Team Viewer****
If you want to at the pier, you can keep a small keyboard and mouse to plug in to the NUC when you need to. Keep a small and cheap HDMI monitor on hand to use with them.
On Jul 12, 2021, at 13:33, Steve Reilly <firstname.lastname@example.org> wrote: