Based on some existing manuscripts.
The mirror polishing tool designed by Huygens looks somewhat similar to the ancient execution guillotine, which is also known as the guillotine of Louis XVI:
A small ball hangs on the 'guillotine', which is rotated by external force to process the glass.
This set of tools is not particularly difficult to prepare and doesn't require very high precision.
After all, in the original 17th century, Europe hadn't started the industrial revolution yet.
However, Xu Yun made some optimizations on the torque compared to Huygens' design:
First, two auxiliary ropes were added to shorten the left-side deflection force.
Secondly, the donkey was used to wind up the spring, which then provided the thrust, saving on manpower costs.
The energy generated by the deformation of the spring lasts for a short time, but the instantaneous magnitude is quite large, which is quite suitable for finishing work.
