×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Are you an
Engineering professional?
Join Eng-Tips Forums!
• Talk With Other Members
• Be Notified Of Responses
• Keyword Search
Favorite Forums
• Automated Signatures
• Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

#### Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

# Pulley ratio

## Pulley ratio

(OP)
Hi all,
Was wondering if anyone could advise me on how to calculate the ratio of the attached pulley set up.
Am trying to set up a stepper motor and am trying to determine the ratio.

Would i be correct in: - ratio = (T1/T2)(T2/T3)
I am not sure if that is correct, due to the two pulleys (T2 and T3) being on the same shaft. Bit confused.

### RE: Pulley ratio

It would have been nice to label either the pulleys or to give the number of teeth.

Still - for one turn of the top pulley will see 18 teeth go by, so that one turn will see 18/45 of a turn of the second one. Then since that fraction of a turn is applied to 20 teeth then the input is (18/45)*20 to the periphery of the output.

### RE: Pulley ratio

(OP)
Hopefully now i will be able to set up the DRO for my y axis travel.

#### Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

#### Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Close Box

# Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

• Talk To Other Members
• Notification Of Responses To Questions
• Favorite Forums One Click Access
• Keyword Search Of All Posts, And More...

Register now while it's still free!