Hello, everyone.

I am modelling a self-blocking worm gear in adams. I have two questions:

1. does the reference diameter in the fig.1 mean pitch diameter of the worm gear? I find the the explanation in the adams document that

"Adams Machinery will issue a warning if the user entered helix angle lies ±0.5o beyond the correct helix angle given by formula:

tan-1 (module*(number of teeth or number of start on WORM) /

WORM reference diameter))."

it is consuing for me.

2. I try the self-blocking parameters for the worm gear, but the worm gear is still able to move even if i put the friction coeffient very large like 10 or 20. I am not sure that if there is a bug in adams.

thanks for you time.