On 7/18/2011 3:52 PM, gene heskett wrote: > On Monday, July 18, 2011 03:49:40 PM Dave did opine: > > >> On 7/17/2011 7:29 PM, gene heskett wrote: >> >>> On Sunday, July 17, 2011 07:25:15 PM dave did opine: >>> >>>> On Sat, 2011-07-16 at 23:10 -0700, Karl Cunningham wrote: >>>> >>>>> Dave wrote: >>>>> >>>>>> I'd like to use as many off the shelf devices as possible - PC >>>>>> boards etc... if possible. >>>>>> >>>>>> Being a typical customer, they want to keep the costs down but they >>>>>> also want it to work and operate reliably. >>>>>> >>>>>> I've had good luck using conventional industrial controls on >>>>>> machines that operate outside, but I have always been able to >>>>>> include a panel heater to minimize condensation issues. >>>>>> >>>>>> Do you guys have any suggestions? >>>>>> >>>>> My son worked in Antarctica for several years, designing and >>>>> installing power equipment at field camps. Here's what I remember >>>>> from that: >>>>> >>>>> 1. Use gel-type lead-acid batteries for generator staring. Keep them >>>>> topped up with a solar panel when sitting. >>>>> 2. If there is a block heater on the generator engine, connect a >>>>> battery charger to the same power source, so the batteries are fully >>>>> charged when it's time to start it. >>>>> 3. If it's really cold, -20F or below, put the batteries in an >>>>> insulated box and use a little of the battery/solar panel juice to >>>>> heat the batteries slightly. >>>>> 4. Use solid-state hard drives. Much better for vibration and cold. >>>>> 5. Computer fans probably won't start cold, but they'll warm up and >>>>> run in time to keep things from overheating. >>>>> 6. Stick with name-brand computer mother board and RAM. They may >>>>> have more conservative timing margins which will be more reliable >>>>> over a wider temperature range. >>>>> >>>>> Karl >>>>> >>>> I'm impressed by the advice that comes from this group. Good >>>> thoughts. >>>> >>>> On overnight reflection on the problem I think it might be easier to >>>> put the computer and monitor in a portable case which get stored in >>>> a decent environment and taken to the job and mounted on the rig. >>>> Open the lid and that exposes the keyboard. Monitor is external and >>>> clips on. Once the rig is up and running then power can be supplied >>>> to keep things warm/cool. >>>> >>>> Take a look a some of the packaging for mil field >>>> computers/equipment. >>>> >>>> HTH >>>> >>>> Dave >>>> >>> While I generally agree, the computers off-rig storage raises the >>> thought that they may not keep it when off-rig, in a well secured >>> place, inviting pilferage& then you start re-inventing that wheel >>> again, and BTW, their first question is going to be "can you make >>> another one for delivery yesterday?" >>> >> I agree... I don't think the customer is going to want the added burden >> of transporting the controls back and forth to the machine. They have >> various crews also.. >> >> What if they forget to bring the case and then drive 50 miles through >> the back country... >> >> I can see them losing it also - especially after a long winter - some >> personnel changes etc... >> >> I want to make the controls removable, but require that several bolts be >> removed along with perhaps a high strength padlock. >> >> Dave >> >> > Good idea, but where is the cutting torch? Around a drill rig there is > probably one on every other truck. This then becomes a cat& mouse game. > OTOH, its probably the best 'retainer' idea yet. > > Cheers, gene > Yes.. all you can do is to make it more difficult to remove.
If someone wants it badly enough....they will get it eventually. Dave ------------------------------------------------------------------------------ Storage Efficiency Calculator This modeling tool is based on patent-pending intellectual property that has been used successfully in hundreds of IBM storage optimization engage- ments, worldwide. Store less, Store more with what you own, Move data to the right place. Try It Now! http://www.accelacomm.com/jaw/sfnl/114/51427378/ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
