[GreenKeys] M28 printer troubleshooting - type box positioning

[Dale Hughes]

Hi Eric,

Thanks for your suggestion and I did consider just running the motor of the
50 Hz mains supply, but most of the advice seems to be "don't do it"
because the motor will run hot etc. leading to early failure. I had the
inverter so it was no problem to run the machine on 60 Hz but it's not an
elegant or a very efficient solution. The baud rate conversion is no
problem but I'm more concerned about the machine reliability. Once I get
the machine working properly I'll try running it at 50 Hz and see what
happens...

Regards

Dale




On Tue, 14 Oct 2025 at 18:54, eric <epvgk at limpoc.com> wrote:

> On 2025-10-12 16:54, Dale Hughes wrote:
>
> I'm running it on a 75 baud 60 mA current loop and at 110 VAC 60 Hz
> through a sine-wave inverter because power here is 50 Hz.
>
>
>
> If I'm not mistaken, if you're just echoing in a loop you should be fine
> on local 50hz power, you'll just be both sending and receiving at 62.5 baud
> rather than 75. It would of course be a problem if trying to copy RTTY over
> the radio, or talking to a fixed 75 baud interface from somewhere else.
>
> If you end up using a computer interface of some sort you can probably
> just set it to 62.5 baud and be fine.
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.qth.net/pipermail/greenkeys/attachments/20251014/2295eb10/attachment.html>