# Inverse of Involute function Calculator

## Calculates the inverse of the involute function using Newton method. | ||||

- Purpose of use
- Inv teeta value
- Comment/Request
- Plese derive the pressure angle teeta. Not get direct values

[1] 2021/05/05 02:59 20 years old level / Elementary school/ Junior high-school student / A little /

- Purpose of use
- Calculation
- Comment/Request
- If involute inv(theta)= 0.112741938, so how to calculate theta

[2] 2019/07/24 14:26 20 years old level / A teacher / A researcher / A little /

- Purpose of use
- Spline calculation
- Comment/Request
- How to reverse calculated theta

[3] 2019/07/24 14:18 30 years old level / Self-employed people / Very /

- Bug report
- Is x0 really (3*inv(theta))^(1/3) for y < 1.2?

I made a script to calculate the inverse of the involute and it never converged by this formula. When I tried just inv(theta)^(1/3), it started to converge. - from Keisan
- Thank you for your advice.We've fixed it as below.

(3*inv(theta))^(-1/3)

-> (3*inv(theta))^(1/3)

[4] 2018/08/24 20:15 - / - / - /

- Purpose of use
- calculating over wires dimensions. I don''t have access to Buckingham''s involute tables
- Comment/Request
- This is an enormous help in my job. I am learning splines pretty late in life

[5] 2018/07/19 14:20 60 years old level or over / An engineer / Very /

- Purpose of use
- Studying the Newton''s method.

[6] 2018/02/11 19:08 40 years old level / Self-employed people / Very /

- Purpose of use
- Calculating for over pin dia in gears and also for referencing for use for making own excel calculator with excel programming

[7] 2017/11/30 18:06 20 years old level / An engineer / Very /

- Purpose of use
- Inverse of involute function was used during one step of calculating the distance between pins of an internal involute spline.

[8] 2017/08/22 18:28 20 years old level / An engineer / Very /

- Purpose of use
- to collect the Involute function for Shifted Profile Gear

[9] 2017/06/15 00:16 30 years old level / An engineer / Useful /

- Purpose of use
- Gear cutting tool designing

[10] 2016/09/08 05:52 20 years old level / An office worker / A public employee / Useful /

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