This machine is suitable for testing the initial writing performance of various types of pens. During testing, first install the pen to be tested into the corresponding fixture, then place a 60g special weight on top of the fixture, adjust the fixture angle so that the pen forms a 50°–70° incline with the writing paper, set the line-drawing speed to simulate freehand straight-line drawing, and after the test, check whether the line marks meet the relevant requirements