Robert-Poelzl Posted October 1, 2017 Report Share Posted October 1, 2017 Hello friends. Im using a DDM 85 with Win7 Prof. 64bit. The DDM is connected with a 2 Meter long USB cable. Before some weeks i had a bluescreen during a night. Since this event i have problems with the connection between DDM and PC. Everything else is working fine. I got the problem that windows installs the windows usb driver. I tried to repair this with the little tutorial from ASA - what is to do if this happend. "howto_recover_usb_driver" But the problem is not realy solved. At the moment it is so that the mount MUST get power before the PC is coming up. If i start the PC first and then the mount - then "Neue Hardware wurde nicht installiert". I set the pc that it will NOT installing a new (windows) driver.- because in this case the pc wouldt install the Windows USB driver. Can somebody help me to solve this problem? Thanks Robert Link to comment Share on other sites More sharing options...
MarkS Posted October 2, 2017 Report Share Posted October 2, 2017 Hi Robert, This may not be very helpful, but after a recent extremely baffling problem with a new camera, I am prompted to ask if you have tried changing the USB cable? They are notoriously unreliable. Regarding your query about start-up sequence, I have always started the mount before turning on the computer and Autoslew. When I was learning the ASA system, I found that this sequence always worked, and I've never varied it. I'd like to know if others do the same? Mark Link to comment Share on other sites More sharing options...
RamaSpaceShip Posted October 2, 2017 Report Share Posted October 2, 2017 Hi Robert and Mark, I use a variant of Mark's solution: I never switch off the mount. This solved the USB problems I had when I start using this mount four years ago, and since then, these problems never surfaced. Hope this helps. Bernard Link to comment Share on other sites More sharing options...
Robert-Poelzl Posted October 2, 2017 Author Report Share Posted October 2, 2017 (edited) Hey Mark and Bernhard, Thanks !!! Ok ..... But i'm wondering about this. Allways turn on is not good in my case because i have to save electric power - My obs is so far away from normal energygrid that i have to use solarbatteries and solarpanels. But if you say then i will start mount before computer. Thanks and CS Robert Edited October 2, 2017 by Robert-Poelzl Link to comment Share on other sites More sharing options...
w0mbat Posted October 3, 2017 Report Share Posted October 3, 2017 Hi Robert, I also turn on all devices including the mount before starting the computer. Has always worked for me. Ian Link to comment Share on other sites More sharing options...
pesa Posted October 4, 2017 Report Share Posted October 4, 2017 (edited) I never turn off computer (except for upgrades and fear of lightning) Everyting else I turn off between sessions. Seems to work. I strongly agree about usb cables, buy the best available quality! pelle Edited October 4, 2017 by pesa Link to comment Share on other sites More sharing options...
lukepower Posted October 4, 2017 Report Share Posted October 4, 2017 Hallo Robert, I would also try to connect to another USB port on the computer side. I had once a situation where one port was fried by some static electricity and sporadically stopped working. Clear skies Link to comment Share on other sites More sharing options...
astrosirius Posted October 5, 2017 Report Share Posted October 5, 2017 Hello Robert I also turn on all the devices, including the mount before starting the computer to recognize better all the devices. For the USB connectivity I am using the Silex SX-DS-4000U2, that permit to connect by Ethernet cable to the hub router all the USB independently. I can swift on and off each one. So no need to be in the observatory in case you have problems. Clear Skies Luis http://astrophotographysirius.com/ Link to comment Share on other sites More sharing options...
Waldemar Posted October 6, 2017 Report Share Posted October 6, 2017 the best USB cables are the USB3 ones. They are made for higher transfer rates, hence made of better materials then the USB2 ones.Always shop for professional cables, ebay material is worse than bad. Link to comment Share on other sites More sharing options...
Josch Posted October 8, 2017 Report Share Posted October 8, 2017 Hi, is there anybody out there having the problem to lose the CCD once in a while? I am having this problem even though I connect the CCD with MAXIM and make an image nevertheless when the CCD should cool say one h later the connection is lost. I need to disconnect and reconnect and all is fine again. It happens randomly. I have used different USB cables, but that seem not to solve the issue. I have now read the first time about this SIlex item and wonder if this would help. Unfortunatly rather expensive to give it a try. My observatorz is very remote in Chile, so difficult to access. Josch Link to comment Share on other sites More sharing options...
w0mbat Posted October 8, 2017 Report Share Posted October 8, 2017 (edited) the best USB cables are the USB3 ones. They are made for higher transfer rates, hence made of better materials then the USB2 ones. Always shop for professional cables, ebay material is worse than bad. Hi Waldemar. It was my understanding that the USB3 wires and the USB2 wires within the cable are completely separate using different contacts within the connectors. So, yes the USB3 wires are higher specification but I don't think that has any significance for the USB2 wires. My practice has been to buy certified USB2 cables from a reputable source. Ian Edited October 8, 2017 by w0mbat Link to comment Share on other sites More sharing options...
MarkS Posted October 9, 2017 Report Share Posted October 9, 2017 Looking at the cable specs for USB3, it is clear that a USB3 cable Type A connects to a USB2 Type A socket via a separate pair of wires from the USB3 ones. That is, Ian is right - it is probably better to spend your money on best quality USB2 cables than USB3 ones. Mark Link to comment Share on other sites More sharing options...
andrewlockwood Posted October 10, 2017 Report Share Posted October 10, 2017 I had similar issues with the computer installing the newer usb drivers for the mount, and used the command line pnputil to list, then removed all the drivers from the system. I did the same thing with the gps drivers. You can also roll back the usb drivers in the device manager in windows and set the system to never upgrade drivers. I did this a few months ago, and have been trouble free for a while. Link to comment Share on other sites More sharing options...
Waldemar Posted October 12, 2017 Report Share Posted October 12, 2017 Looking at the cable specs for USB3, it is clear that a USB3 cable Type A connects to a USB2 Type A socket via a separate pair of wires from the USB3 ones. That is, Ian is right - it is probably better to spend your money on best quality USB2 cables than USB3 ones. Mark I think you are wrong about that. I am using USB3 where I can and that sometimes means, I have a USB2 connection on one side of the cable and a USB3 on the other end. I never had any issues with USB3 cables, but plenty with USB2... even with high quality ones. What I understand is that first of all the quality of the used materials is better, the wiring is thicker and made of OFC copper. (Oxide Free Copper) That means in practice that the speed of the signals can go as fast as they can. No bumps in the form of oxidized spots on their way. Anyway, of course it is just my 2c, but I do notice the positive difference. Link to comment Share on other sites More sharing options...
Josch Posted October 12, 2017 Report Share Posted October 12, 2017 (edited) How do you use USB3 cables on USB2 devices like CCD? The B type connector on USB3 is different to the one on USB2. Josch Edited October 12, 2017 by Josch Link to comment Share on other sites More sharing options...
MarkS Posted October 12, 2017 Report Share Posted October 12, 2017 Hi Waldemar, The USB3 signal wires are definitely heavier and better constructed than USB2, but the USB2 signal wires within the standard USB3 cable are thinner and there is only one pair, whereas the USB3 wires are paired. On Type A connectors, the USB3 do not connect to the USB2 contacts. Whether the USB2 wires are better quality in USB3 cables than they are in USB2 cables I do not know.... I have certainly had no problems using USB3 cables from mount to computer. Mark Link to comment Share on other sites More sharing options...
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