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#1
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USB Cable too long?
Hi all,
We have an Epson flatbed scanner, V600 Photo. It is connected to an USB switch by a cable of 1 meter. One output of the switch is connected with my pc by a cable of 1.8 meter. Scanner works fine. The other output of the switch is connected to the pc of my wife (W7 Pro 64b, mobo: ASUS P7P55D). This cable is also 1.8 meter. On this pc the scanner is recognized, the system bleeps when the scanner is turned on. Scanning is impossible, it gets stuck, the led on the scanner keeps flashing, and nothing further happens. Doesn't make a difference when I use Photoshop or the Epson utility for scanning. When I connect the scanner straight away to my wife's pc with a cable of 1 meter, it works fine. I use Belkin USB cables, thought they are good quality. The USB switch is König, passsive. Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Fokke |
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#2
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USB Cable too long?
On 08/30/2018 08:00 AM, Fokke Nauta wrote:
Hi all, We have an Epson flatbed scanner, V600 Photo. It is connected to an USB switch by a cable of 1 meter. One output of the switch is connected with my pc by a cable of 1.8 meter. Scanner works fine. The other output of the switch is connected to the pc of my wife (W7 Pro 64b, mobo: ASUS P7P55D). This cable is also 1.8 meter. On this pc the scanner is recognized, the system bleeps when the scanner is turned on. Scanning is impossible, it gets stuck, the led on the scanner keeps flashing, and nothing further happens. Doesn't make a difference when I use Photoshop or the Epson utility for scanning. When I connect the scanner straight away to my wife's pc with a cable of 1 meter, it works fine. I use Belkin USB cables, thought they are good quality. The USB switch is König, passsive. Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Fokke Swap ports on the switch. Put your wife's cable into the port you are using. It could be a faulty switch. |
#3
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USB Cable too long?
On Thu, 30 Aug 2018 14:00:32 +0200, Fokke Nauta wrote:
Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Swap the cables to the pcs over to establish if you have a faulty cable. The maximum length of a USB cable is something like 15 metres so the problem is elsewhere and could even be the usb port on your wifes pc. -- Regards - Rodney Pont The from address exists but is mostly dumped, please send any emails to the address below e-mail rpont (at) gmail (dot) com |
#4
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USB Cable too long?
"Fokke Nauta" wrote
| Could it be that total cable length is too much? | Why is the scanner then working allright with my pc? I wouldn't dismiss the other two answers, but I have found that hardware varies. And some devices will tell you in their manuals what the length of a cable can be. We have a high-end Epson photo printer and a budget, everyday printer. (I think the latter may be HP.) Only one can fit near the computer, so there's a 12' USB cord for the other. The Epson simply won't tolerate that cord. The everyday printer doesn't mind at all. So it could be the ports, the switch, the systems.... But it's also possible that you've set it up at the high end of the cable length it will tolerate. On the bright side, all of the ideas presented so far are easy to test. |
#5
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USB Cable too long?
On 30/08/2018 14:48, Big Al wrote:
On 08/30/2018 08:00 AM, Fokke Nauta wrote: Hi all, We have an Epson flatbed scanner, V600 Photo. It is connected to an USB switch by a cable of 1 meter. One output of the switch is connected with my pc by a cable of 1.8 meter. Scanner works fine. The other output of the switch is connected to the pc of my wife (W7 Pro 64b, mobo: ASUS P7P55D). This cable is also 1.8 meter. On this pc the scanner is recognized, the system bleeps when the scanner is turned on. Scanning is impossible, it gets stuck, the led on the scanner keeps flashing, and nothing further happens. Doesn't make a difference when I use Photoshop or the Epson utility for scanning. When I connect the scanner straight away to my wife's pc with a cable of 1 meter, it works fine. I use Belkin USB cables, thought they are good quality. The USB switch is König, passsive. Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Fokke Swap ports on the switch. Put your wife's cable into the port you are using. It could be a faulty switch. Thanks. Already tried that. Didn't make a difference. Changed the cables as well. Fokke |
#6
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USB Cable too long?
On 30/08/2018 14:56, rp wrote:
On Thu, 30 Aug 2018 14:00:32 +0200, Fokke Nauta wrote: Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Swap the cables to the pcs over to establish if you have a faulty cable. The maximum length of a USB cable is something like 15 metres so the problem is elsewhere and could even be the usb port on your wifes pc. I already changed the cables and used different ones. Didn't make a change. To my opinion as well the allowed length of the USB cables may exceed very well the 3.60 meters I use. Fokke |
#7
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USB Cable too long?
On 30/08/2018 15:14, Mayayana wrote:
"Fokke Nauta" wrote | Could it be that total cable length is too much? | Why is the scanner then working allright with my pc? I wouldn't dismiss the other two answers, but I have found that hardware varies. And some devices will tell you in their manuals what the length of a cable can be. We have a high-end Epson photo printer and a budget, everyday printer. (I think the latter may be HP.) Only one can fit near the computer, so there's a 12' USB cord for the other. The Epson simply won't tolerate that cord. The everyday printer doesn't mind at all. So it could be the ports, the switch, the systems.... But it's also possible that you've set it up at the high end of the cable length it will tolerate. On the bright side, all of the ideas presented so far are easy to test. If the scanner is the problem, that it can't handle the length of the USB cables, it would be a problem with my pc as well. Same type of cables, same length. But my system works well with the scanner. Tried different USB inputs on my wwife's pc. Didn't make a difference. Motherboard perhaps? Too old? USB 2.0 inputs, whereas my pc has USB 3.0 inputs. Should this make the difference? Fokke |
#8
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USB Cable too long?
On 08/30/2018 09:26 AM, Fokke Nauta wrote:
On 30/08/2018 15:14, Mayayana wrote: "Fokke Nauta" wrote | Could it be that total cable length is too much? | Why is the scanner then working allright with my pc? Â* I wouldn't dismiss the other two answers, but I have found that hardware varies. And some devices will tell you in their manuals what the length of a cable can be. Â* We have a high-end Epson photo printer and a budget, everyday printer. (I think the latter may be HP.) Only one can fit near the computer, so there's a 12' USB cord for the other. The Epson simply won't tolerate that cord. The everyday printer doesn't mind at all. Â* So it could be the ports, the switch, the systems.... But it's also possible that you've set it up at the high end of the cable length it will tolerate. On the bright side, all of the ideas presented so far are easy to test. If the scanner is the problem, that it can't handle the length of the USB cables, it would be a problem with my pc as well. Same type of cables, same length. But my system works well with the scanner. Tried different USB inputs on my wwife's pc. Didn't make a difference. Motherboard perhaps? Too old? USB 2.0 inputs, whereas my pc has USB 3.0 inputs. Should this make the difference? Fokke But you say your wife's pc works if hooked straight in. So the port is okay. The only variable in this argument is the switch and your wife's USB port not compatible. I can't believe the switch only works on USB 3 but that could be an idea if you have docs on it. But most USB3 are backwards compatible. Real head scratcher. |
#9
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USB Cable too long?
"Fokke Nauta" wrote
| If the scanner is the problem, that it can't handle the length of the | USB cables, it would be a problem with my pc as well. Not necessarily, if it's just near the max length that the scanner can handle. But it's just one idea to rule out. | Motherboard perhaps? Too old? USB 2.0 inputs, whereas my pc has USB 3.0 | inputs. | Should this make the difference? | I've never seen problems with different machines, except that sometimes they seem to require using them in order. That is, #3 port may seem dead if there's nothing plugged into #2 port. As Al said, it works when you plug it in direct. So doesn't that only leave the switch, a cord, or cord length as variables? Maybe try switching the switch connections? I've never used a USB switch, so I don't know about that, but I wonder if there could be some kind of priority glitch. For instance, your PC turned on and somehow getting "first dibs" on the connection. I guess you could test that by turning off your PC and/or unplugging your PC but still leaving the other hooked up via the switch. |
#10
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USB Cable too long?
Fokke Nauta wrote:
Hi all, We have an Epson flatbed scanner, V600 Photo. It is connected to an USB switch by a cable of 1 meter. One output of the switch is connected with my pc by a cable of 1.8 meter. Scanner works fine. The other output of the switch is connected to the pc of my wife (W7 Pro 64b, mobo: ASUS P7P55D). This cable is also 1.8 meter. On this pc the scanner is recognized, the system bleeps when the scanner is turned on. Scanning is impossible, it gets stuck, the led on the scanner keeps flashing, and nothing further happens. Doesn't make a difference when I use Photoshop or the Epson utility for scanning. When I connect the scanner straight away to my wife's pc with a cable of 1 meter, it works fine. I use Belkin USB cables, thought they are good quality. The USB switch is König, passsive. Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Fokke It's possible that the scanner is not compatible with the unknown model of König usb hub. From the König website: "This switch is not compatible with devices that requires a constant connection to a computer. Usually these are devices like multifunctionals or laser printers." |
#11
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USB Cable too long?
On 8/30/2018 8:26 AM, Fokke Nauta wrote:
On 30/08/2018 15:14, Mayayana wrote: "Fokke Nauta" wrote | Could it be that total cable length is too much? | Why is the scanner then working allright with my pc? * I wouldn't dismiss the other two answers, but I have found that hardware varies. And some devices will tell you in their manuals what the length of a cable can be. * We have a high-end Epson photo printer and a budget, everyday printer. (I think the latter may be HP.) Only one can fit near the computer, so there's a 12' USB cord for the other. The Epson simply won't tolerate that cord. The everyday printer doesn't mind at all. * So it could be the ports, the switch, the systems.... But it's also possible that you've set it up at the high end of the cable length it will tolerate. On the bright side, all of the ideas presented so far are easy to test. If the scanner is the problem, that it can't handle the length of the USB cables, it would be a problem with my pc as well. Same type of cables, same length. But my system works well with the scanner. Tried different USB inputs on my wwife's pc. Didn't make a difference. Motherboard perhaps? Too old? USB 2.0 inputs, whereas my pc has USB 3.0 inputs. Should this make the difference? Fokke USB 3 puts out more power than USB 2, get a powered USB hub. |
#12
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USB Cable too long?
Fokke Nauta wrote:
Hi all, We have an Epson flatbed scanner, V600 Photo. It is connected to an USB switch by a cable of 1 meter. One output of the switch is connected with my pc by a cable of 1.8 meter. Scanner works fine. The other output of the switch is connected to the pc of my wife (W7 Pro 64b, mobo: ASUS P7P55D). This cable is also 1.8 meter. On this pc the scanner is recognized, the system bleeps when the scanner is turned on. Scanning is impossible, it gets stuck, the led on the scanner keeps flashing, and nothing further happens. Doesn't make a difference when I use Photoshop or the Epson utility for scanning. When I connect the scanner straight away to my wife's pc with a cable of 1 meter, it works fine. I use Belkin USB cables, thought they are good quality. The USB switch is König, passsive. Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Fokke Will it work when plugged into a USB2 port on your computer? (all my computers have both) -- G Ross |
#13
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USB Cable too long?
On 30/08/2018 19:06, G Ross wrote:
Fokke Nauta wrote: Hi all, We have an Epson flatbed scanner, V600 Photo. It is connected to an USB switch by a cable of 1 meter. One output of the switch is connected with my pc by a cable of 1.8 meter. Scanner works fine. The other output of the switch is connected to the pc of my wife (W7 Pro 64b, mobo: ASUS P7P55D). This cable is also 1.8 meter. On this pc the scanner is recognized, the system bleeps when the scanner is turned on. Scanning is impossible, it gets stuck, the led on the scanner keeps flashing, and nothing further happens. Doesn't make a difference when I use Photoshop or the Epson utility for scanning. When I connect the scanner straight away to my wife's pc with a cable of 1 meter, it works fine. I use Belkin USB cables, thought they are good quality. The USB switch is König, passsive. Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Fokke Will it work when plugged into a USB2 port on your computer? (all my computers have both) Good idea! Yes, the scanner works allright. Fokke |
#14
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USB Cable too long?
On 30/08/2018 16:08, Paul in Houston TX wrote:
Fokke Nauta wrote: Hi all, We have an Epson flatbed scanner, V600 Photo. It is connected to an USB switch by a cable of 1 meter. One output of the switch is connected with my pc by a cable of 1.8 meter. Scanner works fine. The other output of the switch is connected to the pc of my wife (W7 Pro 64b, mobo: ASUS P7P55D). This cable is also 1.8 meter. On this pc the scanner is recognized, the system bleeps when the scanner is turned on. Scanning is impossible, it gets stuck, the led on the scanner keeps flashing, and nothing further happens. Doesn't make a difference when I use Photoshop or the Epson utility for scanning. When I connect the scanner straight away to my wife's pc with a cable of 1 meter, it works fine. I use Belkin USB cables, thought they are good quality. The USB switch is König, passsive. Could it be that total cable length is too much? Why is the scanner then working allright with my pc? What type of cable should I order to make sure the scanner works allright with my wife's pc? Fokke It's possible that the scanner is not compatible with the unknown model of König usb hub. From the König website: "This switch is not compatible with devices that requires a constant connection to a computer. Usually these are devices like multifunctionals or laser printers." You might be right. But then again, why does it work on my pc and not on my wife's pc? And isn't a USB not just an ordinary switch, which connects one wire or the other? Should be fine, shoudn't it? Fokke |
#15
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USB Cable too long?
On 30/08/2018 18:36, NotMe wrote:
On 8/30/2018 8:26 AM, Fokke Nauta wrote: On 30/08/2018 15:14, Mayayana wrote: "Fokke Nauta" wrote | Could it be that total cable length is too much? | Why is the scanner then working allright with my pc? I wouldn't dismiss the other two answers, but I have found that hardware varies. And some devices will tell you in their manuals what the length of a cable can be. We have a high-end Epson photo printer and a budget, everyday printer. (I think the latter may be HP.) Only one can fit near the computer, so there's a 12' USB cord for the other. The Epson simply won't tolerate that cord. The everyday printer doesn't mind at all. So it could be the ports, the switch, the systems.... But it's also possible that you've set it up at the high end of the cable length it will tolerate. On the bright side, all of the ideas presented so far are easy to test. If the scanner is the problem, that it can't handle the length of the USB cables, it would be a problem with my pc as well. Same type of cables, same length. But my system works well with the scanner. Tried different USB inputs on my wwife's pc. Didn't make a difference. Motherboard perhaps? Too old? USB 2.0 inputs, whereas my pc has USB 3.0 inputs. Should this make the difference? Fokke USB 3 puts out more power than USB 2, get a powered USB hub. To my knowledge an USB hub is to connect multiple USB devices to one pc. What I'm doing, is to connect one USB-device with two pc's. Not simultaneously, but either one or the other. One can't use a hub for that. Fokke |
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