# Torque output from rotation

**URL:** <https://calculix.discourse.group/t/torque-output-from-rotation/1832>\
**Category:** Uncategorized\
**Created:** [September 21, 2023, 2:53pm UTC](https://calculix.discourse.group/t/torque-output-from-rotation/1832 "2023-09-21T14:53:09Z")\
**Posts on this page:** 1\
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**Author:** ![fgr](https://avatars.discourse-cdn.com/v4/letter/f/f4b2a3/32.png) [@fgr](https://calculix.discourse.group/u/fgr)\
**Post date:** [September 21, 2023, 3:39pm UTC](https://calculix.discourse.group/t/torque-output-from-rotation/1832/2 "2023-09-21T15:39:29Z")

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If you have defined/transformed your master node into a cylindrical coordinate system and added the torque as a boundary movement to the master node by a Radius, a radian angle, and Z in cylinder axis, your problem could be that the cylindrical coordinate system in ccx is more a tangential coordinate system than a cylindrical since a given node is moved the tangent distance and not the radial distance as normal expected in a cylindrical coordinate system

> [@Source code hack for the cylindrical coordinate system](https://calculix.discourse.group/t/source-code-hack-for-the-cylindrical-coordinate-system/1349):
>
> In ANSYS the cylindrical coordinate is define by (a Radius, a radian angle, and Z in cylinder axis) whereby a predescribed angular movement of a node cause the node to move an angle on the cylinder surface. In Calculix the similar statement causes the node to be moved a tangential distance in ““mm”” described by the value of ““radian”” whereby the node leaves the given cylinder surface. Do anyone inside here have a source code hack causing Calculix to behave like ANSYS or do anyone more specif…

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