I use a Trimble 5600 Robotic Total Station which I've owned from new for 14 years. Apart from the odd wear and tear repair it been a great piece of kit until recently. I've experienced an intermittent problem with it's operation. It stops working and I get a message on my logger saying, "choral failure". I then have to re set up several times before it starts working again. I took it to my main dealer who had it for a day and they couldn't find anything wrong with it. ( korec UK). I've tried different loggers as well as different data cards.
Any ideas?? I plan to upgrade as soon as I can afford to, but in the meantime have to use this one which has served me very well and am still very fond of it. Thanks