How cold is too cold
Posted 10 January 2010 - 12:35 AM
Posted 10 January 2010 - 12:52 AM
Posted 10 January 2010 - 02:40 AM
Posted 10 January 2010 - 02:53 AM
Here in Vancouver it usually doesn't drop below freezing...so around 1-2 degrees Celsius.
what 35 degree F?
Posted 10 January 2010 - 03:52 AM
Posted 10 January 2010 - 04:39 AM
Posted 10 January 2010 - 06:25 AM
Posted 10 January 2010 - 07:00 AM
Alternatively, put the hand control inside of a warm pocket of your jacket (should be a good idea to use then a telephone extension cable 6p6C)or attach with a rubber band a hand warmer sac to the back of the nexstar Hand control.
Posted 10 January 2010 - 09:53 AM
Posted 10 January 2010 - 12:05 PM
Posted 10 January 2010 - 12:20 PM
I run out of cold tolerance long before the mount does.
Posted 10 January 2010 - 12:21 PM
The Mini Towers and MT Pro which we were testing all worked well. They held up much better than we did even though we were wearing snow mobile suits and had heaters in our boots! I'm still trying to thaw out!
Posted 10 January 2010 - 12:29 PM
anyone have an idea on how to keep mounts warm?
Most often, it's not the mount you have to keep warm, it's the battery and hand controller. Most mounts begin to have trouble in the cold not because they are freezing up, but because cold puts an awful strain on batteries--voltage drops and the mount begins to have trouble. Hand controllers? Main problem is LCD displays, which start gettin' sluggish at about 32F.
Posted 10 January 2010 - 12:52 PM
Posted 10 January 2010 - 02:44 PM
Thanks Rod, It was about -10 last night so it was pretty cold. The battery was showing full charge. Everytime I moved the scope in ra it would keep moving until power was shut down. Would this be consistant with power problem or motor sticking. The hand control was unreadable at one point. So I warmed it,but ra still would not work properly. Any ideas
Yep, sounds like a power issue...and...yes...cold is hell on batteries.
Posted 11 January 2010 - 01:24 AM
Posted 11 January 2010 - 11:16 AM
... I am using a cigar lighter plug maybe thats the problem? I still have ra problem.....
Cigar lighter plugs don't make great contact even in the best of times. If you examine one, you'll find that areas of contact are small, the springs that pressure the metal contacts are weak, and any bit of corrosion on the contact points will interfere with the flow of current.
On any new piece of equipment that I get, I remove the cigar lighter connectors and replace them with connectors that make solid connections.
Posted 11 January 2010 - 12:16 PM
Posted 11 January 2010 - 08:17 PM
Posted 11 January 2010 - 11:41 PM
Heating the hand controller is critical. I'm sure the circuit boards work but the LCD display will not, and if the LCD display is not working than nothing else is.
The AP mounts that are used at -75 F are not "out of the box." They have been adjusted and special lubricants are used.
One of the reasons why I prefer my two stepper mounts to go-to is that they are so nearly as I can tell impervious to cold, and demand no adjustments whatsoever from summer time to dead of winter. The coldest I go out is about -10F after that it ceases to be fun.
Posted 12 January 2010 - 12:08 AM