How to Wind a Coil Spring on the Metal Lathe

[EdK]

Thank you Arvid! After reading the article yesterday, I stared at Marv's code and knew there was something wrong with it but could not put my finger on it. No wonder I keep getting a negative number for the mandrel diameter when I select phosphorus bronze with my program. It's curious that it's not the case when I run Marv's version of the program. I get the same results whether I select music or bronze wire.

Excellent analysis!

With your information I can now finish up the program.

Ed