Tear it down and replace it with a new one.

First remove the blade with a screwdriver, and then use the sharpener that comes with the original machine to sharpen it. When sharpening, only sharpen the oblique side. Carefully observe the opening angle of the original knife. This is correct. Cutting ability is very important, then put it on the whetstone to compare and sharpen it gently.

A microtome is a machine that cuts thin and uniform tissue slices. The tissue is supported by hard paraffin or other substances. Each time it is cut, the slice thickness device automatically advances the required distance forward (toward the direction of the knife). , the gradient of the thickness gauge is usually 1 micron.