When operating the circle making machine, you need to see what the diameter of the circle you are making minus the size of the iron wire to obtain a number multiplied by 3.14, then divided by 0.83624 to obtain the number. You can input it into the machine, and its default value should be between 60 and 150 less than the original number.
For example, a 3-inch ring has a diameter of 120mm and an iron wire of 3.5
Formulas such as 120-3.5=116.5 * 3.14=365.81/0.83624=437.44619
You just need to input the number before the decimal point.
The default value should be between 60 and 150 less than the original value.