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From: roy_ccwchan on 23 Dec 2007 07:05
Hi there,


I have both HP17BII (not + ver.) & HP 82240B printer, once I want to
print some solve eqn. I found it miss some char. randomly, try second
time miss char in another places. Did I miss some setting on calc. or
printer?
Try using AC adapter & set set printer either "AC adapter" or "NO AC
adapter"
I did try other calc. like HP-17BII+ but did not find any missing
word.

Any suggestion & comment.


Thanks in advance..


Roy
From: Bruce Horrocks on 23 Dec 2007 14:21
roy_ccwchan(a)sinaman.com wrote:
> I have both HP17BII (not + ver.) & HP 82240B printer, once I want to
> print some solve eqn. I found it miss some char. randomly, try second
> time miss char in another places. Did I miss some setting on calc. or
> printer?
> Try using AC adapter & set set printer either "AC adapter" or "NO AC
> adapter"
> I did try other calc. like HP-17BII+ but did not find any missing
> word.

Put fresh batteries in the 17BII.
Try "No adapter" mode but still use the AC adapter on the printer.
Clean the IR plastic cover on the 17BII

Regards,
--
Bruce Horrocks
Surrey
England
(bruce at scorecrow dot com)
From: John H Meyers on 23 Dec 2007 18:09
On Sun, 23 Dec 2007 13:21:03 -0600, Bruce Horrocks wrote:

> Put fresh batteries in the 17BII.
> Try "No adapter" mode but still use the AC adapter on the printer.

Yes, becuse "no adapter" setting in calc inserts more delay between lines,
helping to prevent filling up the printer's limited buffer.

The printer's speed, in turn, is slower on batteries,
which is why the calc has a setting to slow down for it;
low voltage on the AC mains may also slow it a bit.

The printer also doesn't enter a "low power" mode while on AC.

> Clean the IR plastic cover on the 17BII

Also reduce distance between calc and printer.

If 17BII+ is fine with printer but 17BII can't be made equally fine,
then was there ever any engineering flaw in 17BII printing system?

The fact that the dropped character is random
suggests that it's not a matter of character set
(e.g. between 82240A vs. 82240B)

Is the "dropped" character missing (no space), or is it a space,
or is it a special "bad char" mark? (IIRC,
characters which can't be self-corrected via ECC bits
are supposed to print a special symbol instead).

HP82240B Technical Interfacing Guide PDF
http://www.hpcalc.org/details.php?id=4742
http://www.hpcalc.org/hp48/docs/programming/82240bte.zip

[r->] [OFF]
From: roy_ccwchan on 23 Dec 2007 22:21
On 12$B7n(B24$BF|(B, $B>e8a(B7$B;~(B09$BJ,(B, "John H Meyers" <jhmey...(a)nomail.invalid> wrote:
> On Sun, 23 Dec 2007 13:21:03 -0600, Bruce Horrocks wrote:
> > Put fresh batteries in the 17BII.
> > Try "No adapter" mode but still use the AC adapter on the printer.
>
> Yes, becuse "no adapter" setting in calc inserts more delay between lines,
> helping to prevent filling up the printer's limited buffer.
>
> The printer's speed, in turn, is slower on batteries,
> which is why the calc has a setting to slow down for it;
> low voltage on the AC mains may also slow it a bit.
>
> The printer also doesn't enter a "low power" mode while on AC.
>
> > Clean the IR plastic cover on the 17BII
>
> Also reduce distance between calc and printer.
>
> If 17BII+ is fine with printer but 17BII can't be made equally fine,
> then was there ever any engineering flaw in 17BII printing system?
>
> The fact that the dropped character is random
> suggests that it's not a matter of character set
> (e.g. between 82240A vs. 82240B)
>
> Is the "dropped" character missing (no space), or is it a space,
> or is it a special "bad char" mark? (IIRC,
> characters which can't be self-corrected via ECC bits
> are supposed to print a special symbol instead).
>
> HP82240B Technical Interfacing Guide PDFhttp://www.hpcalc.org/details.php?id=4742http://www.hpcalc.org/hp48/docs/programming/82240bte.zip
>
> [r->] [OFF]


Thanks for all comment, since I tried both on HP17BII+ & 17BII but
with difference result I don't think is the matter of battery
related.

"dropped" character always miss print like

Org. : ABCDE

printout : BCDE or ABCE

distance between two devices are closed enough (1 inch) with open
battery cover. I suspect it may be something wrong with calc. speed
sending char out to printer somehow too fast.

Anyway, I decided to write down by hand and figure out the reason
later on.

Thanks

Roy
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