Troubleshooting of rough adjustment part of video microscope
The main malfunction of rough adjustment of video microscopes is inconsistent tension during automatic sliding or lifting. The so-called automatic sliding refers to the phenomenon of the optical head or stage slowly falling down without adjustment when it is stationary in a certain position, under the influence of its own weight. The reason is that the gravity of the optical head and the stage itself is greater than the static friction force. The solution is to increase the static friction force to be greater than the gravity of the mirror tube or arm itself.
For the coarse adjustment mechanism of the oblique tube and most binocular video microscopes, when the optical head part automatically slides down, both hands can grip the stop pulley on the inner side of the coarse adjustment handwheel, and both hands can tighten clockwise to stop the sliding. If it does not work, professional personnel should be sought for repair.
The automatic sliding of the optical part often gives people the illusion that it is caused by the loose fit between the gears and racks. So we added shims under the rack. In this way, although the sliding of the video microscope barrel can be temporarily stopped, it causes the gears and racks to be in an abnormal biting state. The result of motion causes both the gears and racks to deform. Especially with uneven padding, the deformation of the rack is even more severe, resulting in some biting tightly and some biting loosely. Therefore, this method is not suitable for use.
In addition, due to the long-term disrepair of the rough adjustment mechanism, the lubricating oil is dry, and there is an uncomfortable feeling when lifting, and even the friction sound of the machine parts can be heard. At this point, the mechanical device can be removed for cleaning, greased, and reassembled.
