Re: ot: kx-p1124i configuration
‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Friday, May 7, 2021 7:27 PM, Gene Heskett <gheskett@shentel.net> wrote:
> On Friday 07 May 2021 19:36:51 fxkl47BF wrote:
>
> > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> > On Friday, May 7, 2021 6:27 PM, Gene Heskett gheskett@shentel.net
>
> wrote:
>
> > > On Friday 07 May 2021 18:14:19 fxkl47BF wrote:
> > >
> > > > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
> > > > On Friday, May 7, 2021 6:45 AM, Gene Heskett gheskett@shentel.net
> > >
> > > wrote:
> > >
> > > > > On Friday 07 May 2021 07:10:16 fxkl47BF wrote:
> > > > >
> > > > > > a friend gave me a panasonic kx-p1124i. the printer works ok
> > > > > > and i have it connected with a parallel cable. i configured it
> > > > > > with cups to use "Driver: Panasonic KX-P1124 Foomatic/epson
> > > > > > (recommended) (grayscale)". it prints garbage. i downloaded
> > > > > > the ppd file recommended at openprinting.org and still get
> > > > > > garbage. suggestions are appreciated.
> > > > >
> > > > > You may not be able to on hat old a printer unless the driver
> > > > > can be configured to hold the port data valid until the printer
> > > > > acks the strobe signal.
> > > > > That printer has fcc required noise filters in its input socket
> > > > > which restricts the data speed, and if the port doesn't hold the
> > > > > data until the printer acks it, at least 2 microseconds, its
> > > > > going to print garbage. BTDT, gave up and used the slower serial
> > > > > port the printer also had. You need a 1284 rated cable, and a
> > > > > printer port that can do EPP mode, not always supported by mobo
> > > > > hardware. I could be wrong, but it sure smells like this.
> > > >
> > > > i checked the port and it is set to epp
> > > > excuse me if i ramble a bit
> > > > i create a file with one word 'hello' followed by a newline and a
> > > > carriage return the content of the file in hex is 68 65 6C 6C 6F
> > > > 0A 0C if i print the file with cat file > /dev/lp0 i get "helloJL"
> > > > capital J is 0x0a plus 0x40, capital L is 0x0c plus 0x40
> > > > 0x0a and 0x0c are control characters
> > > > where and why are they being converted to printable characters
> > >
> > > That is usefull, as it says the port is duff, with bit d6 stuck
> > > high. Or possibly that the cable is duff, can you "ring" it with an
> > > ohmeter?
> > > d0 set would be a 0x01, d1 would be a 0x02, and d2 would be an 0x04,
> > > d3 would be an 0x08, d4=0x10, d5=0x20 and d6=0x40. Possibly blown by
> > > being plugged in live at some time back in the mists of time. If the
> > > machines card bus has an empty slot, you might try a different port
> > > card. A $20 bill should get one of those.
> > > There could be some old mostech chips that don't support epp though,
> > > so make sure the web page propaganda says it does support epp.
> > > Thats a 24 pin head "pin pounder" printer, and I'd be surprised if
> > > all the pins work, they were small and fragile 2 decades ago. It,
> > > and the 24 pin oki's were about the best of the lot back then.
> > > Nowadays, the parport is fading away, and thats making it hard to
> > > build a cnc machine controller on the cheap using a parport breakout
> > > board for the machine control.
> >
> > i tried a motherboard with a builtin parallel port
> > a startech card, a rosewill card, and a parallel to usb adapter
> > the results was all the same
> > the answer is probably right in front of me and i'm to thick to see it
> > :)
>
> You've about covered it, I've run a smallish milling machine with both
> startech and rosewll cards, rosewell with an occasional hiccup but that
> motherboard did not have very good latency figures. I located some
> testing stuff, which pointed a guilty finger at the nvidia video board
> driver, which thought nothing of locking up the rest of the system for
> 300 milliseconds while it updated the screen. You simply cannot do that
> while giving a stepper motor its marching cadence thru the parport every
> 40 microseconds.
>
> Regretably, that leaves the printer itself, have you tried another?
i have a friend that has a different make of dot matrix printer
i'm going to see if he'll let me borrow it
this list doesn't seem to be the best place to discuss printers
maybe the people at emc-users would have some ideas
they don't seem to mind off topic discussions
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