How to Solve the Trouble of Microscope Coarse Adjustment
The main failure of the coarse adjustment of the microscope is that the automatic sliding or lifting is inconsistent. Automatic sliding refers to the phenomenon that when the lens barrel, lens arm or stage is still at a certain position, without adjustment, it will automatically and slowly fall down under the action of the weight of the microscope itself. The reason is that the gravity of the lens barrel, lens arm, and 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 lens barrel or lens arm itself.
For the coarse adjustment mechanism of the inclined tube of the microscope and most binocular microscopes, when the mirror arm automatically slides down, you can hold the anti-slip wheel on the inside of the coarse adjustment handwheel with both hands, and tighten it clockwise with both hands to stop the slide. If there is no effect, you should find a professional to repair it.
The automatic slide of the microscope lens barrel is often mistaken for the loose fit between the gear and the rack. So add spacers under the rack. In this way, although the slide of the microscope lens barrel can be stopped temporarily, the gear and the rack are in an abnormal meshing state. As a result of the movement, both the gear and the rack are deformed. Especially when the mat is uneven, the deformation of the rack is more serious. As a result, some parts are bitten tightly and some parts are bitten loosely. Therefore, this method should not be adopted.
Due to the long-term disrepair of the coarse adjustment mechanism of the microscope, the lubricating oil is dry, and it will produce an uncomfortable feeling when lifting and lowering, and even the friction sound of the parts can be heard. At this time, the mechanical device can be disassembled for cleaning, greased and reassembled.
Microscope adjustment and common faults
1. Use the movement of the micro-moving stage and the cross coordinate line of the panocular to measure the length.
2. Use the vernier differential angle disc at the lower end of the rotating stage and the eyepiece, and match the address coordinate line of the eyepiece to measure the angle, so that one end of the angle to be measured is aligned with the cross line, and then the other end is also aligned with the cross line. coincide.
3. Use the standard to detect the size or shape of the thread pitch, pitch diameter, outer diameter, tooth angle and tooth shape.
4. Check the grain condition of the metallographic surface.
5. Check the surface condition of the workpiece.
6. Detect whether the size or contour of the tiny workpiece is consistent with the standard sheet.
Common failures of Olympus microscopes:
1. The lens barrel slides down by itself;
2. The positioning of the shutter is out of order;
3. Difficulty in rotating the objective lens converter or failure in positioning;
4. The lenses of the eyepiece and objective lens are polluted or mildewed;
5. The mirror frame and the mirror hip cannot be fixed when they are tilted.
