Rod Bartlett wrote: > > On Dec 20, 2024, at 10:39 PM, Paul Berger via cctalk > > <cctalk(a)classiccmp.org> wrote: > > > > The chain with box drawing characters mention in the original post where > > used to print > > the ALD. The 1403 had logic that limited the number of hammers that could > > fire at once, > > there was a test routine that would repeatedly fire the maximum number of > > hammers it was > > called the "Chain Breaker Routine". The only drum printer I ever saw > > operating > > I think it was a Honeywell printer and the person demoing it printed out > > some pictures, > > the printer could fire most if not all hammers at once which made quite a > > racket. > > > > Paul. > As a field engineer for Honeywell, I always dreaded the holidays because so > many people > would launch print jobs which used repeated overstrikes to create pictures. > Those jobs > sometimes fired the maximum number of hammers at a time to speed up the > picture creation > which would sometimes cause multiple hammer actuator fuses to blow. More > than once I had > to buy all the 2 amp fuses from multiple Radio Shacks to get the printer > operational > again. Those overstrikes also caused the paper to become more saturated with > ink which > resulted in more paper/ink residue getting deposited in the print chain, > which required > heavier than normal cleanings during the next preventative maintenance window. > > Another thing which caused more work for field engineers around the holidays > were jobs > sent to the card punches to play Jingle Bells by punching fully laced cards > in time to the > music. It was entertaining unless they caused card jams too bad for the > operators to be > able to clear by themselves. Fully laced punch cards are too flexible to > pass through the > punch path cleanly. > > - Rod
You mean like this? https://www.ibmjunkman.com/cards/?Holder=6309&Img=1
