Manual precision grinder

Manual precision grinderMDG1Technical manual

Before the TEM transmission sample enters the ion thinning process, it needs to be processed into a flat, uniform, and thin sample, which is called pre thinning. Pre thinning or polishing processes can help improve the efficiency and quality of subsequent ion thinning.

The manual precision grinder MDG1 can quickly perform flat grinding and accurately control sample thickness.

Product Features

1. It can obtain a large diameter, uniform, and parallel polished surface, which facilitates subsequent processes to obtain large-area nanoscale thin areas.

2. Precisely control the final thickness of the sample through a micrometer and display it on a dial with an accuracy of 10um (optional 1um accuracy).

3. The weight of the grinder itself serves as the pressure required for grinding, and the operator only needs to easily support the grinder. During the sample grinding process, the force is evenly and gently applied, avoiding mechanical damage to the sample.

4. It is possible to quickly obtain planar samples with a thickness greater than 10um (the actual ultimate thickness depends on the material and grinding level) and a diameter less than ø 15mm through high repeatability.

5. Widely used in materials science and electronic product sample preparation and processing processes.

Usage

zero calibration

1. Take out the sample column (without placing the sample at this time) and place it in the base.

2. Rotate the handle to retract the sample column until it is fully retracted into the hole, with the end face slightly lower than the surface of the grinding disc.

3. Drop some water droplets (3-4 drops are sufficient) on the surface of the grinding disc around the sample column, and cover it with a flat glass sheet. The water droplets are evenly pressed between the glass and the grinding disc.

4. Slowly rotate the handle to remove the sample column, and stop immediately when the water under the glass begins to move. At this point, the top of the sample column touches the glass, meaning that the top of the sample column is in the same plane as the surface of the grinding disc.

5. Rotate the dial to the zero position of the handle pointer, and the zero position is now set. Secure the screws on the dial.

Install sample

1. Take out the sample column, clean it thoroughly, and place it on a heating table and heat it to 130 º C (temperature must not exceed 200 º C)

2. Take a small amount of paraffin and place it at the top of the sample column, melt it and set it aside for later use.

3. Place the sample on the sample column and gently press to remove any bubbles, ensuring a tight bond between the sample and the column.

4. Remove the sample column to room temperature and allow the paraffin to cool. The sample is reliably bonded to the sample column, completing the sample installation.

ground sample

1. Load the sample column (carrying the sample at the end) into the base and rotate the handle to slightly expose the sample.

2. Grinding the sample, it is recommended to use an 8-shaped motion circuit to make the grinding more uniform.

3. Heat and remove the sample, flip it over and reinstall it on the sample column. The sampling method is the same as above.

4. Reload the sample into the base and adjust the handle to control the grinding amount for each feed until the final desired thickness is obtained (usually 50um, depending on the sample material itself and the grinding process).

Take out the sample

1. Rotate the sample column and carefully remove it to protect the sample from damage.
2. Heat the sample column and use tweezers to remove the sample. If the sample is exceptionally fragile, the sample column and sample can be dissolved in acetone for half an hour before being removed.
3. Dissolve the paraffin wax thoroughly in chloroform or acetone to obtain a clean sample.

Warning: The clearance between the sample column and the base hole is very small. Please keep the side of the sample column clean to avoid getting stuck.