Teachers, I would like to ask, is there any way to roll an 83*20mm sheet of iron into a circle with a diameter of 17mm? Is it molded in one mold or dedicated?
First calculate the circumference of the circle you want to roll. Then add twice the minimum rolling length of your roller. Blanking, and then winding.
Handwriting depends on how many boards you use. Calculate the circumference of the circle you want to roll first, and then roll. But the quality of hand-rolled products is not good. And it is very laborious.