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USB Cable too long?



 
 
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  #46  
Old August 31st 18, 10:34 PM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default USB Cable too long?

Fokke Nauta wrote:
On 31/08/2018 20:44, Paul wrote:
Fokke Nauta wrote:
On 31/08/2018 00:41, VanguardLH wrote:
Fokke Nauta wrote:

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?

Is it actually a USB switch or is it a USB hub?

It's an USB switch, mechanically.

https://www.allekabels.nl/usb-schake...BoCZnEQAvD_BwE



I notice on the same page, for twice the price,
there's one that looks electronic rather than mechanical.

https://www.allekabels.nl/aten/4906/...laar-aten.html



https://assets.aten.com/product/manual/us_221_421.pdf

It can be switched with software.

Paul


Thanks!
Wow, this is great! I will order this one, perhaps it will do the trick!
And, BTW, where did you learn Dutch?

Fokke


It was just a guess.

I had to double-check the Aten PDF to make sure it
was filled with electronic goodness. Since it can be
switched in software, that suggests it isn't
a mechanical switch.

Since it doesn't use a driver, my assumption is
that the driver is actually a "USB hub" driver
already in the OS. It will likely be 100% functional,
from WinXP SP3 onwards.

Paul
Ads
  #47  
Old September 1st 18, 12:30 AM posted to alt.windows7.general
VanguardLH[_2_]
external usenet poster
 
Posts: 10,881
Default USB Cable too long?

Fokke Nauta wrote:

And both of the pc's recognize the scanner, but my wife's pc can't scan.


Hold on. I thought you said the scanner worked (which means wasn't just
detected and you could scan with it) when connected *directly* to your
wife's PC. That is, when NOT going through the USB switchbox but
instead with the scanner cabled directly to your wife's PC, the scanner
was still unusable by your wife's PC?

[Using USBDeview to see if scanner is detected on PC]
On my pc: yes
On my wife's pc: Yes!


So the device is detected on both PCs but only your wife's PC has a
problem actually using the scanner. When the scanner is cabled directly
to your wife's PC (not through the switchbox), can that PC *use* the
scanner?

https://www.drivereasy.com/knowledge...on-windows-10/
mentions NOT running the Epson software in a compatibility mode. Did you
check? Did you check the software's service was set to Automatic (and
also check that service was actually in Started or running state)?

I would try the following:
- Uninstall the Epson software on the wife's PC.
o Might want to use Revo Uninstaller for a more thorough cleanup.
o Use USBDeview on the wife's PC to delete all registry enumerations
for the Epson scanner (easier than doing the registry editing).
- Connect the scanner directly to the wife's PC.
- Leave the scanner powered off. Many installers want to see the device
appear when you power it on, not try to detect one already recognized.
- Install the Epson software.
- Reboot even if the installer doesn't prompt you.
- With the PC running, power on the scanner.
o Should hear the bong-bing sound to notify of detecting the device.
o Use USBDeview to check the scanner is recognized.
- Use the Epson software to do a scan.
o Don't run it in a compatibility mode.
o Check its service is running.

If that works:
- Connect the wife's PC to the "USB in 1" on the switchbox.
- Do NOT connect the other PC to the "USB in 2" port on the switchbox.
Just your wife's PC is attached to the switchbox for now.
- Turn off the scanner.
- Add a cable to connect the scanner to the switchbox's "USB out" port.
- Depress the "USB in 1" pushbutton on the switchbox.
- Power on the scanner. Wait until it finishes initializing (blue LED
stops flashing).
- Check if the scanner is detected by the wife's PC.
o You hear the bong-bing sound.
o USBDeview lists the scanner as connected.
o That only checks the wife's PC can detect the scanner through the
switchbox through its #1 port, not that software can use the
scanner.
- Run a scan on the wife's PC.

If that works:
- Turn off the scanner.
- Move the USB cable from the wife's PC to the "USB in 2" port on the
switchbox.
- Depress the "USB in 2" pushbutton on the switchbox.
- Power on the scanner and wait until it initializes.
- Check scanner is detects by the wife's PC.
o You hear bong-bin sound.
o USBDeview lists the scanner.
- Run a scan on the wife's PC.

If that works, add your PC, so the switchbox now has 2 PCs connected to
it instead of just 1.
- Leave the setup as-is from above testing: wife's PC on switchbox "USB
in 2" port.
o Wife's PC connected to "USB in 2" on switchbox.
o Switchbox still set to "USB in 2".
- Power off the scanner.
- Connect your PC to "USB in 1" on the switchbox.
- Turn on the scanner. Wait for it to initialize.
- Try a scan from the wife's PC.
o That should still work because it worked before in the above setup.
o If the scan now fails, it's because you added a second PC to the
switchbox (to validate the need for the switchbox).

If that works:
- Turn off the scanner.
- Push "USB in 1" pushbutton on the switchbox.
- Power on the scanner and wait for it to initialize.
- Check you can use the scanner on your PC.
If so:
- Turn off scanner.
- Push "USB in 2" pushbutton on the switchbox.
- Power on the scanner and wait for it to initialize.
- Check your wife's PC can still use the scanner.

You said you already tried swapping PCs to the different switchbox
ports, so no need to go through that setup. Presumably at one of the
steps in the above procedures there will be a failure to use the scanner
(not to detect it but to use the Epson software with the scanner).
  #48  
Old September 1st 18, 02:27 AM posted to alt.windows7.general
Mark Lloyd[_2_]
external usenet poster
 
Posts: 1,756
Default USB Cable too long?

On 08/31/2018 11:07 AM, Jesper Kaas wrote:

[snip]

Could it be that automatic USB-switches generally are ****? We had one
delivered together with some lab equipment. One printer was shared
between two PCs with a USB-switch. It worked sometimes, but often did
not, so it really was a pain. Changed to network connectd printer, and
no more problems.


I tried a printer switch once, and didn't like it (it was too long ago
to remember why). Other than that. I've always installed printer on one
computer and used the network. If you don't already have a network, it's
a useful thing to have.

--
Mark Lloyd
http://notstupid.us/

sign at a travel agency "Welcome ... Please Go Away"
  #49  
Old September 1st 18, 11:14 AM posted to alt.windows7.general
Fokke Nauta[_4_]
external usenet poster
 
Posts: 587
Default USB Cable too long?

On 31/08/2018 23:34, Paul wrote:
Fokke Nauta wrote:
On 31/08/2018 20:44, Paul wrote:
Fokke Nauta wrote:
On 31/08/2018 00:41, VanguardLH wrote:
Fokke Nauta wrote:

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?

Is it actually a USB switch or is it a USB hub?

It's an USB switch, mechanically.

https://www.allekabels.nl/usb-schake...BoCZnEQAvD_BwE



I notice on the same page, for twice the price,
there's one that looks electronic rather than mechanical.

https://www.allekabels.nl/aten/4906/...laar-aten.html



https://assets.aten.com/product/manual/us_221_421.pdf

It can be switched with software.

Paul


Thanks!
Wow, this is great! I will order this one, perhaps it will do the trick!
And, BTW, where did you learn Dutch?

Fokke


It was just a guess.

I had to double-check the Aten PDF to make sure it
was filled with electronic goodness. Since it can be
switched in software, that suggests it isn't
a mechanical switch.

Since it doesn't use a driver, my assumption is
that the driver is actually a "USB hub" driver
already in the OS. It will likely be 100% functional,
from WinXP SP3 onwards.

Paul


It looks good. I just ordered it.
I'll expect it to be here on Monday. I'll come back on this one.

Fokke
  #50  
Old September 1st 18, 12:51 PM posted to alt.windows7.general
Fokke Nauta[_4_]
external usenet poster
 
Posts: 587
Default USB Cable too long?

On 01/09/2018 01:30, VanguardLH wrote:
Fokke Nauta wrote:

And both of the pc's recognize the scanner, but my wife's pc can't scan.


Hold on. I thought you said the scanner worked (which means wasn't just
detected and you could scan with it) when connected *directly* to your
wife's PC.


Correct!

That is, when NOT going through the USB switchbox but
instead with the scanner cabled directly to your wife's PC, the scanner
was still unusable by your wife's PC?


No, when I connect the scanner directly to my wife's pc, it works fine.
Only when connecting via the switch, it won't scan.

[Using USBDeview to see if scanner is detected on PC]
On my pc: yes
On my wife's pc: Yes!


So the device is detected on both PCs but only your wife's PC has a
problem actually using the scanner.


Yes

When the scanner is cabled directly
to your wife's PC (not through the switchbox), can that PC *use* the
scanner?


Yes

https://www.drivereasy.com/knowledge...on-windows-10/
mentions NOT running the Epson software in a compatibility mode. Did you
check? Did you check the software's service was set to Automatic (and
also check that service was actually in Started or running state)?


Well, on my wife's pc there is Windows 7. And Epson software and
Photoshop work well with the scanner as long as it is connected directly.

I would try the following:
- Uninstall the Epson software on the wife's PC.
o Might want to use Revo Uninstaller for a more thorough cleanup.
o Use USBDeview on the wife's PC to delete all registry enumerations
for the Epson scanner (easier than doing the registry editing).
- Connect the scanner directly to the wife's PC.
- Leave the scanner powered off. Many installers want to see the device
appear when you power it on, not try to detect one already recognized.
- Install the Epson software.
- Reboot even if the installer doesn't prompt you.
- With the PC running, power on the scanner.
o Should hear the bong-bing sound to notify of detecting the device.
o Use USBDeview to check the scanner is recognized.
- Use the Epson software to do a scan.
o Don't run it in a compatibility mode.
o Check its service is running.

If that works:
- Connect the wife's PC to the "USB in 1" on the switchbox.
- Do NOT connect the other PC to the "USB in 2" port on the switchbox.
Just your wife's PC is attached to the switchbox for now.
- Turn off the scanner.
- Add a cable to connect the scanner to the switchbox's "USB out" port.
- Depress the "USB in 1" pushbutton on the switchbox.
- Power on the scanner. Wait until it finishes initializing (blue LED
stops flashing).
- Check if the scanner is detected by the wife's PC.
o You hear the bong-bing sound.
o USBDeview lists the scanner as connected.
o That only checks the wife's PC can detect the scanner through the
switchbox through its #1 port, not that software can use the
scanner.
- Run a scan on the wife's PC.

If that works:
- Turn off the scanner.
- Move the USB cable from the wife's PC to the "USB in 2" port on the
switchbox.
- Depress the "USB in 2" pushbutton on the switchbox.
- Power on the scanner and wait until it initializes.
- Check scanner is detects by the wife's PC.
o You hear bong-bin sound.
o USBDeview lists the scanner.
- Run a scan on the wife's PC.

If that works, add your PC, so the switchbox now has 2 PCs connected to
it instead of just 1.
- Leave the setup as-is from above testing: wife's PC on switchbox "USB
in 2" port.
o Wife's PC connected to "USB in 2" on switchbox.
o Switchbox still set to "USB in 2".
- Power off the scanner.
- Connect your PC to "USB in 1" on the switchbox.
- Turn on the scanner. Wait for it to initialize.
- Try a scan from the wife's PC.
o That should still work because it worked before in the above setup.
o If the scan now fails, it's because you added a second PC to the
switchbox (to validate the need for the switchbox).

If that works:
- Turn off the scanner.
- Push "USB in 1" pushbutton on the switchbox.
- Power on the scanner and wait for it to initialize.
- Check you can use the scanner on your PC.
If so:
- Turn off scanner.
- Push "USB in 2" pushbutton on the switchbox.
- Power on the scanner and wait for it to initialize.
- Check your wife's PC can still use the scanner.


That looks complicated. I will first opt for Pauls solution:

"I notice on the same page, for twice the price,
there's one that looks electronic rather than mechanical.

https://www.allekabels.nl/aten/4906/...laar-aten.html

https://assets.aten.com/product/manual/us_221_421.pdf

It can be switched with software. "

When that won't work, I will follow your way.

You said you already tried swapping PCs to the different switchbox
ports, so no need to go through that setup. Presumably at one of the
steps in the above procedures there will be a failure to use the scanner
(not to detect it but to use the Epson software with the scanner).


I think it's a combination of a problem with the scanner, and the total
length of the cable to the USB port of my wife's pc.

Fokke
  #51  
Old September 1st 18, 12:52 PM posted to alt.windows7.general
Fokke Nauta[_4_]
external usenet poster
 
Posts: 587
Default USB Cable too long?

On 01/09/2018 03:27, Mark Lloyd wrote:
On 08/31/2018 11:07 AM, Jesper Kaas wrote:

[snip]

Could it be that automatic USB-switches generally are ****? We had one
delivered together with some lab equipment. One printer was shared
between two PCs with a USB-switch. It worked sometimes, but often did
not, so it really was a pain. Changed to network connectd printer, and
no more problems.


I tried a printer switch once, and didn't like it (it was too long ago
to remember why). Other than that. I've always installed printer on one
computer and used the network. If you don't already have a network, it's
a useful thing to have.


We do have a network and have a printer directly connected to the LAN.

Fokke
  #52  
Old September 1st 18, 11:38 PM posted to alt.windows7.general
Stan Brown
external usenet poster
 
Posts: 2,904
Default 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?


There are too many variables to be sure. What happens if you swap the
two 180 cm cables? What happens if you have the same cable going to
each place but connect each one to the other terminal of the switch?

--
Stan Brown, Oak Road Systems, Tompkins County, New York, USA
http://BrownMath.com/
http://OakRoadSystems.com/
Shikata ga nai...
  #53  
Old September 4th 18, 03:01 PM posted to alt.windows7.general
Fokke Nauta[_4_]
external usenet poster
 
Posts: 587
Default USB Cable too long?

On 30/08/2018 14:00, 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


Pauls solution:

"I notice on the same page, for twice the price,
there's one that looks electronic rather than mechanical.

https://www.allekabels.nl/aten/4906/...laar-aten.html

https://assets.aten.com/product/manual/us_221_421.pdf

It can be switched with software."

did the trick. With this switch it works. Still don't understand why it
did not work with the mechanical switch, but we're happy now!

Thanks all for your help and suggestions.

Fokke

  #54  
Old September 4th 18, 04:55 PM posted to alt.windows7.general
Paul[_32_]
external usenet poster
 
Posts: 11,873
Default USB Cable too long?

Fokke Nauta wrote:
On 30/08/2018 14:00, 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


Pauls solution:

"I notice on the same page, for twice the price,
there's one that looks electronic rather than mechanical.

https://www.allekabels.nl/aten/4906/...laar-aten.html


https://assets.aten.com/product/manual/us_221_421.pdf

It can be switched with software."

did the trick. With this switch it works. Still don't understand why it
did not work with the mechanical switch, but we're happy now!

Thanks all for your help and suggestions.

Fokke


Well, for once, "signal integrity" mattered :-)

Or maybe it's Tuesday.

We'll never know for sure.

Paul
  #55  
Old September 4th 18, 05:56 PM posted to alt.windows7.general
Fokke Nauta[_4_]
external usenet poster
 
Posts: 587
Default USB Cable too long?

On 04/09/2018 17:55, Paul wrote:
Fokke Nauta wrote:
On 30/08/2018 14:00, 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


Pauls solution:

"I notice on the same page, for twice the price,
there's one that looks electronic rather than mechanical.

https://www.allekabels.nl/aten/4906/...laar-aten.html


https://assets.aten.com/product/manual/us_221_421.pdf

It can be switched with software."

did the trick. With this switch it works. Still don't understand why
it did not work with the mechanical switch, but we're happy now!

Thanks all for your help and suggestions.

Fokke


Well, for once, "signal integrity" mattered :-)

Or maybe it's Tuesday.

We'll never know for sure.

Paul


Well, at least my wife is able to use the scanner on Tuesdays. And I can
use it for the rest of the week :-)

Fokke
 




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