[GreenKeys] Low paper indicator/ shut off model 28

[Harold Hallikainen]

Though not suitable for unattended operation, I like the simplicity of the
red mark along the side of the paper at the end of the roll. Similarly, I
think punched tape should have end of line markers every 70 or so
characters. This would be a lot simpler than the character counters on
perforators. If there are a lot of unprintable characters on the tape
(such as FIGS and LTRS), the line would be short. But the simplicity
compared with the character counters on perforators seems worth it.

A software solution on printer end of paper could be for the terminal unit
to count line fees and warn you when a roll's worth of line feeds have
been received.

Harold
https://w6iwi.org


On Sat, March 22, 2025 1:30 pm, Stan Voynick wrote:
> I infer from Andy's description that the use of two separate switches is
> so that they can be positioned to trigger at two different times.   One is
> positioned to activate a "low paper" warning light, but the machine would
> be allowed to continue running for a time after that.  Then if the
> Teletype machine's human servant doesn't replace the paper roll in time,
> and it runs further down - dangerously low - the second switch would cut
> off the TTY machine power altogether to prevent running out and typing
> directly on the platen.
>
>   - Stan V
>     WB7RPG
>     Hood River, OR
>
>> On 03/19/2025 7:39 AM PDT Jeff G <jeffg at junknet.net> wrote:
>>
>>
>> Instead of two switches, just use a relay to switch both.
>>
>> On Wed, Mar 19, 2025 at 10:27 AM abowman89 via GreenKeys
>> <greenkeys at mailman.qth.net mailto:greenkeys at mailman.qth.net> wrote:
>>
>> >
>> > Hi,
>> >      so since my machine is now usable I was woundering.  Was the low
>> paper indicator a kit you could get or something folks made?
>> >      I tend to leave my machines running for a day or two at a time on
>> the autostart streams and have almost ran my 15 out of paper a
>> few times.  I want to make a low paper indicator light for my
>> model 28 (just the printer) that would also cut the power to the
>> machine, if left too long.  In my head Id have to have two
>> switches.  One for the low level light and one for the power cut
>> off.  If I figure it out I will make one for my 15.
>> >      Has anybody made or heard of anything?
>> >
>> >    Bowman
>> >
>> >
>> > Sent via the Samsung Galaxy S24+, an AT&T 5G smartphone
>> >
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>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>> https://teletype.net/gksearch
>>>> 2002-to-present greenkeys archive:
>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>> 1998-to-2001 greenkeys archive:
>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
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>>>> http://comcents.com/tty/greenkeyssearch.html
>
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