Troubleshooting of the roughing section of the micro lotteries
The main fault of the microscope rough adjustment is the automatic decline or lifting and lowering with different tightness. The so-called automatic decline refers to the mirror tube, mirror arm or carrier table resting in a certain position, without adjustment, under the action of the weight of the microscope itself, the phenomenon of falling down automatically and slowly. The reason is that the gravity of the lens barrel, arm, carrier itself is greater than the static friction caused. The solution is to increase the static friction so that it is greater than the gravity of the lens barrel or arm itself.
For the microscope tilt tube and most of the binocular microscope coarse adjustment mechanism, when the mirror arm automatically slide down, available in both hands, respectively, hold to the coarse adjustment of the handwheel on the inside of the stop pulley, both hands are in the clockwise direction of the tightening of the force, you can stop the slide. If it does not work, you should find a professional to repair.
Microscope tube automatically down, often give people the illusion that the gear and rack with too loose caused. So add shims under the rack. In this way, although the slide of the microscope tube can be temporarily stopped, but it makes the gear and rack in the abnormal bite state. As a result of the movement, the gear and rack are deformed. Especially when the pad is not flat, the deformation of the rack is more powerful, the result is part of the bite is tight, part of the bite is loose. Therefore, this method should not be used.
In addition, due to the microscope rough adjustment mechanism for a long time in disrepair, lubricant dry, lift will produce uncomfortable feeling, and even can hear the friction sound of the machine parts. At this point, the mechanism can be removed and cleaned, reassembled after greasing.
