|WikiProject Typography||(Rated Start-class, Low-importance)|
Needs a picture
- Often, 32 characters, uppercase only. I remember lineprinters. One job was with a toothbrush and some meths cleaning ribbon fluff and old ink from the drum around the characters and inside hollow characters such as 0 and O and 8. And nuisances such as a line of text printing astride the folds in the lineprinter paper. Anthony Appleyard (talk) 22:55, 14 December 2017 (UTC)
I'd like to see print samples from the various types of printers, especially a bit out of alignment, as each type of printer exhibited it's own unique registration problems (wavy lines, character clipping, etc.) 220.127.116.11 (talk) 12:35, 12 January 2011 (UTC)
Paper (forms) handling
"Many printers supported ASA carriage control characters..."
Really? I worked on a number of line printer drivers across a couple of OS's, and never saw one that implemented ASA carriage control characters in the printer. The conversion of ASA carriage control characters was always in the FORTRAN I/O library or provided in a post processing filter. 18.104.22.168 (talk) 05:42, 29 December 2011 (UTC)
Another type of drum printer?
Back in the late '60s I was on a tour of the Selfridge Air National Guard Base. In the "command center," where they had taped newspapers over some equipment to hide it from us, there was a line printer in use, and I was fascinated. Its basic construction was what is described as a drum printer, but I have a distinct memory of the entire cylinder moving to strike the paper, not the other way around. Did some of them work that way, or is my memory flawed? PapayaSF (talk) 20:55, 31 August 2014 (UTC)
- The drum spins about its horizontal axis. I think it would be too heavy to move it back and forth too. The printers with half the number of print heads which move the hammer bank back a forth often result in the whole printer moving back and forth in the opposite sense to some degree, because the hammer bank is also quite heavy and the motion shakes the whole printer. Sadg4000 (talk) 18:49, 30 January 2015 (UTC)
What is the logic of this?
Often the character sequences are staggered around the drum, shifting with each column. This obviates the situation whereby all of the hammers fire simultaneously when printing a line that consists of the same character in all columns, such as a complete line of dashes ("----").