Posts: 1,322
Threads: 115
Joined: Jul 2005
mine is a cx stamped the 44th month of 87 and was sold as the controler for a numericly controled machine tooling unit.
Posts: 237
Threads: 20
Joined: Mar 2006
The halfnut version of the 41CV/CX were made in the last 3 to 4 years of the 41 run. Someone here check me if I am wrong, but the halfnut was so named because it was manufactured with half of the componants of the original 41. The PCBs went from 4 to 2 and the chips went from about 4 to 1 or 2. The difference in the 2 was denoted by the black band around the display. Only the halfnut versions had the black band. The halfnut version also had additional features built into its chip to allow for better MCode programing. I hope this helps.
Posts: 1,788
Threads: 36
Joined: Aug 2007
The halfnut machines tend to be more reliable (but less repairable) than the full nut machines. This is becuase they have drastically fewer components and connections than the full nuts (especially that zebra connector between the CPU and keyboard). For harsh field conditions the half nut machines are best.
Full nut displays are much better than the half nut ones. They can be read over a wider viewing angle, have higher contast, and have less temperature dependent variations.
Also full nut keyboards tend to be clickier (both audible and tactile) than the half nut ones. Some people like the softer keys, others like their keys loud and snappy.