How to solve the problem of coarse collimation spiral descent of optical microscopes

Move the gear to the middle of the shank sleeve notch, and let the notch of the shank sleeve face the rack, and then use a small screwdriver to tighten the two stop screws on the end face of the tail guide. If it is invalid, it means that the rack is seriously worn, so you need to remove the lens barrel, unscrew the fixing screws on and below the rack, and use the rack upside down, because the rack wear mainly occurs in the upper part of the rack. Click for product details

Or cut a metal sheet according to the width of the rack, let the metal sheet be embedded in the rack, and fix the sheet and rack on the lens barrel with fixing screws, and insert the lens barrel for adjustment. If you feel tight, you can change the thickness of the sheet until it fits. Or buy a new rack from the manufacturer according to the original model specifications.

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In a regular microscope, the innermost side of the coarse adjustment is adjusted to adjust the tightness and tightness (some on the left side, some on the right side) as shown in the figure below, just adjust this. If the gear inside is broken, it is estimated that it will have to be returned to the factory for repair.

1. Adjust the difference in radians

The coarse collimation spiral of the microscope causes a large displacement of the lens barrel, while the fine collimation spiral causes a small displacement of the lens barrel.

2. The order of use is different

When using the microscope, first adjust the coarse collimation spiral to determine the clearer field of view, and then turn the fine collimation spiral to fine-tune the field of view to make the field of view clearer.

3. Observe the difference of objects:

The coarse quasi-focal spiral is used to find observations, and the field of view is relatively large. The fine collimation spiral is used to make the object in the field of view clearer, and is used when the object has been found in the mirror.

Microscopically, the two helices act as follows:

1. Coarse quasi-focal spiral: let the microscope stage move up and down quickly, and adjust the appropriate distance of the observed object image in a large range.

2. Fine focus spiral: let the microscope stage move up and down slowly, and adjust the appropriate distance of the object image in a small range. The coarse collimator spiral makes the lens barrel displace greatly, while the fine collimator spiral makes the lens barrel displace slightly, in detail, the coarse collimator spiral rotates once, and the lens barrel rises or falls by 4cm, while the fine collimator spiral rotates once, and the lens barrel only rises or falls less than one millimeter.

When using, first adjust the coarse collimation spiral to determine a clearer field of vision, and then turn the fine collimation spiral to fine-tune to make the field of vision clearer. Extended information: Troubleshooting of some faults of coarse collimation spiral The main fault of coarse adjustment is the inconsistent tightness when automatically sliding or lifting.

The so-called automatic descent refers to the phenomenon that the lens tube, arm or stage is stationary in a certain position, without adjustment, under the action of its own weight, automatically and slowly falling. The reason for this is that the gravity of the lens tube, arm and stage itself is greater than the static friction. The solution is to increase the static friction force so that it is greater than the gravitational force of the lens barrel or the arm itself.

For the coarse adjustment mechanism of the oblique cylinder and most binocular microscopes, when the mirror arm slides down automatically, you can hold the anti-slide wheel on the inside of the coarse adjustment handwheel with both hands, and tighten it in a clockwise direction with both hands to stop the slide. If this does not work, you should find a professional to repair it.

On the first floor, I will add: the fine quasi-focal spiral is opposite to the coarse quasi-focal spiral, the former has a small focusing amplitude and the latter is large. A fine collimation spiral is used to focus a high magnification lens to see an object clearly, while to find an object is to focus with a coarse collimation spiral at low magnification. (Both act on the upward and downward rise and fall of the lens barrel).

There is a small error on the second floor: '

If the coarse collimation spiral is activated when observing with a high magnification lens.

may cause damage to the lens.

Or shattered' If you can never find the object with a coarse quasifocal spiral at this time, it is unlikely that the broken mirror will be used, and the operation of the microscope is something that most people will pay attention to.

The coarse quasifocal spiral is not.

Used to zoom in.

There is no amplification effect.

They are used to adjust the distance between the objective tube and the mounting.

When observing with a low magnification lens, it is necessary to adjust the alignment spiral.

When converted to high-magnification observation.

Only fine-alignment spirals are allowed to be turned.

If the coarse collimation spiral is activated when observing with a high magnification lens.

may cause the lens to be damaged or shattered.

In fact, it is very simple to say, the diameter of the gear behind the coarse collimation helix is larger, and the gear connected after the fine collimation helix is smaller, the pinion is stuck on the large gear, and the large gear drives the transmission shaft, so the microscope lens moves up and down.

Therefore, if the coarse collimation spiral is several weeks of the fine collimation spiral, this degree is determined by the diameter of the gear, and the adjustment amplitude of different microscopes is also different, generally more than ten to one.

These two spirals are used for focusing, not for order repulsion and lice, and are used to adjust the distance between the eyepiece and the objective lens to achieve a suitable position to see the image clearly. Just like in the past, cameras had to focus on the camera, and the object could only be seen clearly when it was in focus. The amplitude of the coarse collimation spiral adjustment is large, and the amplitude of the fine collimation spiral adjustment is small.

Summary. Okay, dear! I hope the rest can help you.

The details for you are:1The coarse focus spiral of the microscope is usually rotated in the opposite direction, and in general, it needs to be rotated 200 words, which means that it needs to be rotated 2 times.

2.The coarse focus spiral helps to adjust the objective and eyepiece of the microscope to an approximate focal length, resulting in a sharp image. 3.

The coarse focus spiral should rotate in the opposite direction to the microscope's objective and eyepiece so that the objective and eyepiece can be adjusted to the appropriate position. 4.The number of rotations depends on the structure of the microscope, i.e., if the structure of the microscope is designed more precisely, the number of rotations of the coarse focus helix can be reduced without the need for 2 rotations.

Hello! I'm glad to help you with the answer to your question: in general, you should make about 2-3 turns. However, this depends on the type of microscope and the precision of the tuning.

You've done a great job! Can you elaborate on that?

Okay, dear! I hope the rest can help you. The details given to you are to make Qiao Liang:

1.The coarse focus spiral of the microscope is usually rotated in the opposite direction, and in general, it needs to be rotated 200 characters wide, that is, it needs to be rotated 2 times. 2.

The coarse focus spiral helps to adjust the objective and eyepiece of the microscope to an approximate focal length, resulting in a sharp image. 3.The coarse focus spiral should rotate in the opposite direction to the microscope's object width and eyepiece, so that the objective lens and eyepiece can be adjusted to the appropriate position.

4.The number of rotations depends on the structure of the microscope, i.e., if the structure of the microscope is designed more precisely, the number of rotations of the coarse focus helix can be reduced without the need for 2 rotations.