I need help with worm gear could you help me please?

I attach some pictures, I tried ti design this but some information I think is worg, it doesn't match some formulas, and the gear doesn't match the spur gear

I appreciate you help

thank you so much

http://postimage.org/image/sfgwa2rab/

http://postimage.org/image/ulb74kuqr/

http://postimage.org/image/6wvp9ay77/

http://postimage.org/image/45cfiozoj/