the drum or similarly the chains used on the hammer printers were in constant motion.
I am just old enough that I had to repair both types at the beginning of my career. Although typically rebranded Data Products and other OEMs, which I am probably wrong but vaguely remember being a supplier for the DEC L20?(maybe). But different than this printer.
To these hammer action printer, the ribbon and the paper weren't even a consideration.
If you have a Newton's cradle, put a piece of paper between the inner balls and it will still mostly work if you release a single ball.
The high speed drum printers they typically had to rotate twice for each line (at minimum) so a 600lpm printer would have the drum rotating at about 1200rpm.
If you look at the video posted in another comment, you can see the ragged vertical alignment of the chars. IIRC that is why IBM preferred chains in their hammer printers, because the human eye was more forgiving of vertical misalignment compared to the vertical misalignment that was a natural result of the mechanical differences.
the drum or similarly the chains used on the hammer printers were in constant motion.
I am just old enough that I had to repair both types at the beginning of my career. Although typically rebranded Data Products and other OEMs, which I am probably wrong but vaguely remember being a supplier for the DEC L20?(maybe). But different than this printer.
To these hammer action printer, the ribbon and the paper weren't even a consideration.
If you have a Newton's cradle, put a piece of paper between the inner balls and it will still mostly work if you release a single ball.
The high speed drum printers they typically had to rotate twice for each line (at minimum) so a 600lpm printer would have the drum rotating at about 1200rpm.
If you look at the video posted in another comment, you can see the ragged vertical alignment of the chars. IIRC that is why IBM preferred chains in their hammer printers, because the human eye was more forgiving of vertical misalignment compared to the vertical misalignment that was a natural result of the mechanical differences.
Edited to add link to video from page:
https://www.youtube.com/watch?v=EDeL15amsus