Pantograph for drawing cycloid curves

Blue, orange, green and yellow bars create a pantograph. Two red pins and blue one are in line. The blue pin traces a curve of cycloid family (in green) subject to radii of pink and violet cranks, gear transmission ratio (2 for this video). Inventor files of this video: http://www.mediafire.com/file/cfmik0sxdbbsvh0/PantoCycloidInv.zip

• #فناوری_و_رایانه
• #curve
• #pantograph
• #mechanism