michael@python.UUCP (M. Cain) (07/03/85)
There was recently an extensive discussion about building onesies and twosies on the net, and I don't recall which group it was in, but net.micro seems a reasonable place to ask this question: I need to build ten or twelve copies of a circuit board, and would prefer not to do it by hand (a wire-wrapped prototype involved several hundred point-to-point connections). How do people feel about some of the options available? - Automated wire wrap done from a complete schematic and a component map by a company like Augat? - Printed circuit board, with quite an expense up front in getting the design and the artwork right. - Something else? Locally, I've heard about bad experiences with the automated wire wrap, to the tune of 5-10% of the wires connected to the wrong post at at least one end, which sounds like a real pain to debug. Thanks in advance, Michael Cain Bell Communications Research ..!bellcore!python!michael
gene@batman.UUCP (Gene Mutschler) (07/11/85)
> I need to build ten or twelve copies of a circuit board, > and would prefer not to do it by hand (a wire-wrapped > prototype involved several hundred point-to-point > connections). How do people feel about some of the > options available? > > - Automated wire wrap done from a complete schematic > and a component map by a company like Augat? > > - Printed circuit board, with quite an expense up front > in getting the design and the artwork right. We have used this at Burroughs ARC. We used Multiwire at the time, although Burroughs can now do the same thing internally. The first time, we did a lot of things by hand. There was a lot of up front work as well as the substantial up front expense. Debugging the resulting board was somewhat tedious. The second time around, we had some tools on Mentor workstations. The up front work was less, and the debugging was much simpler, as we had a better handle on the design. It would have been extremely simple, but somewhere along the line (we think at Multiwire) a node got dropped. Unfortunately it had about 70 connections. Ultimately the board had to be remade, but we were able to basically plug the remade version right in.