I read the post the other day where the guy got slammed by some fellow (an architect, basically something of an engineer) for asking the weight of a steel beam. Then I see a reply to the post 'found on road dead' where one guy was talking bad about CAD programs and another guy who, engineer or not, was defended them. Seeing those posts and reading my Machine Design magazine, which is basically aimed at engineers, got me to thinking about some things. First most engineers I've known had a 'complex' that they new everything and were better than the rest of us. Funny thing is I had a frend knew one that couldn't even change his own tire. He probably could have designed the drivetrain but couldn't change a tire.
That presents one of the biggest problems with todays engineers, many of them have book smarts but that's about it. They go to colledge and then graduate where their asked to design machines or parts of machines that they have little to no clue what the machine is ultimately supposed to do in the real world. Personally I think before an engineer can design or especially upgrade/change an existing design they should be required to spend time in the field working on and around the equipment their designing. Granted there are new products designed and I understand that but if you make a new machine, say a widget to replace an older machine,say a gidget, then you need to know what that giget did before you can design a proper widget to take it's place. I read articles in Mach.Design and sometimes I feel like their just designing new stuff every year to justify their jobs. I read in Machine Design where these engineers are talking about making a new thingamajig to do exactly what the old style thingamajig did. The old one did it mechanically and was easy to buy parts for locally and repair on your own when it broke, while the new one costs more (may be cheaper but who really cares since it only lasts half as long as the old ones), is now all electronic and using propriatory components, only lasts half as long as the old ones, and couldn't be repaired if you wanted to. Better yet I've read articles where they are taking a machine that, for instance, has 100 parts and they add electronics and another 25 parts in order to 'simplify' the design for the consumer. This kind of logis just doesn't make sense to me. As for the CAD vs a "pencil and paper" I think CAD has it's uses but when it takes the place of a true designer it becomes worthless. In the slide rule days a guy could figure it might take 3 inches to get a part out so he gave 31/8 just to be safe. Nowdays if that computer says it's going to take 2.999 clearance to remove that part, etc then they give 2.999 clearance to work on it. They seem to forget the tollerances on the part are +.003 and minus .001. You can pray your part comes out of the factory being .001 undersize becuse if it's on the high (+003 end it's not coming out. I often wonder if the old guy figuring with his slide rule that he might be 5% off on his calculations so he gave an extra .006 to remove the part. Working on both new as well as old equipment I find alot more of the new stuff that parts don't fit properly here or there, or part A can't come out without a major ovrhaul,all because there's no room to make them fit properly. On the older stuff I only see that problem on rare occasions..
That presents one of the biggest problems with todays engineers, many of them have book smarts but that's about it. They go to colledge and then graduate where their asked to design machines or parts of machines that they have little to no clue what the machine is ultimately supposed to do in the real world. Personally I think before an engineer can design or especially upgrade/change an existing design they should be required to spend time in the field working on and around the equipment their designing. Granted there are new products designed and I understand that but if you make a new machine, say a widget to replace an older machine,say a gidget, then you need to know what that giget did before you can design a proper widget to take it's place. I read articles in Mach.Design and sometimes I feel like their just designing new stuff every year to justify their jobs. I read in Machine Design where these engineers are talking about making a new thingamajig to do exactly what the old style thingamajig did. The old one did it mechanically and was easy to buy parts for locally and repair on your own when it broke, while the new one costs more (may be cheaper but who really cares since it only lasts half as long as the old ones), is now all electronic and using propriatory components, only lasts half as long as the old ones, and couldn't be repaired if you wanted to. Better yet I've read articles where they are taking a machine that, for instance, has 100 parts and they add electronics and another 25 parts in order to 'simplify' the design for the consumer. This kind of logis just doesn't make sense to me. As for the CAD vs a "pencil and paper" I think CAD has it's uses but when it takes the place of a true designer it becomes worthless. In the slide rule days a guy could figure it might take 3 inches to get a part out so he gave 31/8 just to be safe. Nowdays if that computer says it's going to take 2.999 clearance to remove that part, etc then they give 2.999 clearance to work on it. They seem to forget the tollerances on the part are +.003 and minus .001. You can pray your part comes out of the factory being .001 undersize becuse if it's on the high (+003 end it's not coming out. I often wonder if the old guy figuring with his slide rule that he might be 5% off on his calculations so he gave an extra .006 to remove the part. Working on both new as well as old equipment I find alot more of the new stuff that parts don't fit properly here or there, or part A can't come out without a major ovrhaul,all because there's no room to make them fit properly. On the older stuff I only see that problem on rare occasions..