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news.virgin.net
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 Posted: Fri May 25, 2007 10:32 pm Post subject: Flatbed printer mod |
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I have built a flatbed printer from an old Epson Stylus 640 but need to fool
the
printer into thinking there is paper in, when the drive stepper is disabled
I have tried timing relays but can't get it right. Does any clever person
know how I do this. Maybe some way of resetting the control chip
I have a good knowledge of electronics but can't find the relevant info.
This would be a great project if it were possible.
DH |
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news.virgin.net
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| Posted: Fri May 25, 2007 11:28 pm Post subject: Re: Flatbed printer mod |
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Yeh I do know this but its all about timing if you switch it too early or
too late it gives no paper light.I'm hoping for a way to switch the chip. I
want the feed off until I print.
Cheers
"kony" <spam@spam.com> wrote in message
news:u1he53pe8tjvmsbrdvglfhh295qr0e9koj@4ax.com...
| Quote: | On Fri, 25 May 2007 17:32:25 GMT, "news.virgin.net"
dave,pittam@virgin.net> wrote:
I have built a flatbed printer from an old Epson Stylus 640 but need to
fool
the
printer into thinking there is paper in, when the drive stepper is
disabled
I have tried timing relays but can't get it right. Does any clever person
know how I do this. Maybe some way of resetting the control chip
I have a good knowledge of electronics but can't find the relevant info.
Paper detection is typically either an optical sensor or
microswitch with a small springed plastic tab. Look in the
paper path and wires leading away from the circuit board to
find these sensors. |
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kony
Guest
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| Posted: Fri May 25, 2007 11:29 pm Post subject: Re: Flatbed printer mod |
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On Fri, 25 May 2007 17:32:25 GMT, "news.virgin.net"
<dave,pittam@virgin.net> wrote:
| Quote: | I have built a flatbed printer from an old Epson Stylus 640 but need to fool
the
printer into thinking there is paper in, when the drive stepper is disabled
I have tried timing relays but can't get it right. Does any clever person
know how I do this. Maybe some way of resetting the control chip
I have a good knowledge of electronics but can't find the relevant info.
|
Paper detection is typically either an optical sensor or
microswitch with a small springed plastic tab. Look in the
paper path and wires leading away from the circuit board to
find these sensors. |
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kony
Guest
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| Posted: Sat May 26, 2007 5:06 am Post subject: Re: Flatbed printer mod |
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On Fri, 25 May 2007 22:12:05 GMT, "news.virgin.net"
<dave,pittam@virgin.net> wrote:
| Quote: | Yeh I do know this but its all about timing if you switch it too early or
too late it gives no paper light.I'm hoping for a way to switch the chip. I
want the feed off until I print.
Cheers
|
Well you didn't mention what chip it is, and if there's a
datasheet. If the printer is not entirely reconfigured yet
it might be possible to put a piece of paper in and see the
sequence and timing needed, and perhaps more than one switch
needs to sense the paper concurrently but not all of them at
once? |
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