On Thu, 27 Mar 2008 23:18:18 -0400, you wrote: >On Thursday 27 March 2008 03:23:10 pm John wrote: > >> My point was that if you get an assembled K3, factory >> tested and ready to go, your chances of having a problem are about >> zero. > > This, and others reports of SMD components not being soldered >suggests that the boards are not fully tested. > I've never heard of Lego components being substandard so that >the robot can't be built. > >Ian, G4ICV, AB2GR, K2 #4962
I once worked as a production manager for a company that manufactured and sold electronic camera control equipment for the printing industry. This was in the early 70's before everything was solid state. We had a "burn in room" where after going through quality control, all of the equipment was turned on and left running for 24 hours while setting on spring mounted shelves that were shaken violently enough that the units had to be secured to the shelves. We did this to simulate the vibration of shipping via truck and aircraft. We then checked each unit for adjustment changes, etc. If they failed on the vibrator they were repaired and sent back to the vibrator for another run. We never had a unit come back due to bad soldering or loose nuts and bolts because the vibration burn in would find these troubles for us before we shipped. It's possible that tested K3 units are suffering from vibration during shipping which is revealing those anomalies that won't show up until after the units and kits are subjected to shipping vibration. You might be surprised how much vibration a cargo aircraft has during takeoff, landing and flight. Then there are the cross country trucks and local delivery trucks that have a lot more vibration in their cargo areas than an aircraft. Tom, N5GE - SWOT 3537 - Grid EM12jq "They that can give up essential liberty to obtain a little temporary safety deserve neither liberty nor safety." --Benjamin Franklin 1775 Support the entire Constitution, not just the parts you like. http://www.n5ge.com http://www.eQSL.cc/Member.cfm?N5GE _______________________________________________ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
