# Cylindrical coordinate system Rotational DOF's **URL:** \ **Category:** General Questions\ **Created:** [July 5, 2024, 9:48am UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852 "2024-07-05T09:48:39Z")\ **Posts on this page:** 8\ **Page:** 1
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [July 5, 2024, 9:48am UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852/1 "2024-07-05T09:48:39Z")
Boundary GUI doesn’t display the Rotational DOF’s when the Cylindrical coordinate system is selected. Is this a limitation ?? ![screenshot.6](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/f/ff8f9e652dbe70c0c796d3972be830ae0dc614b4.jpeg) ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [July 5, 2024, 10:08am UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852/2 "2024-07-05T10:08:40Z")
From the ccx documentation: > Notice that a \*TRANSFORM card is not allowed for nodes in which boundary conditions are applied to rotations. ---
**Author:** ![ANYS](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/anys/32/7737_2.png) [@ANYS](https://prepomax.discourse.group/u/ANYS)\ **Post date:** [July 5, 2024, 11:41am UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852/3 "2024-07-05T11:41:42Z")
> [@FEAnalyst](#): > > \*TRANSFORM card is not allowed for nodes in which boundary conditions are applied to rotations. I think it’s an outdated note or maybe I’m wrong. The same ccx manual 2.21 page 110. states : The treatment of the boundary conditions for shell elements is straightfor- ward. The user can independently fix any translational degree of freedom (DOF 1 through 3) or any rotational DOF (DOF 4 through 6). Here, DOF 4 is the rotation about the global or local x-axis, DOF 5 about the global or local y-axis and DOF 6 about the global or local z-axis. Local axes apply if the transfor- mation (\*TRANSFORM) has been defined, else the global system applies. The difference is noticeble . ![screenshot.9](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/a/a66f5c6df2a24c54c9863ad197e34ed0a5a5cb40.jpeg) ![screenshot.8](https://global.discourse-cdn.com/free1/uploads/prepomax/original/2X/7/7137a6b3dc0e75241f525b960afb2893f2244575.jpeg) ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [July 6, 2024, 5:21pm UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852/4 "2024-07-06T17:21:40Z")
I followed the CalculiX documentation. Are there any tests that confirm the rotational degrees of freedom are working? ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [July 6, 2024, 5:47pm UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852/5 "2024-07-06T17:47:17Z")
I can contact Guido regarding this. If he confirms that it’s working normally, I will ask him to update the quoted part of the documentation (and other apparently outdated ccx manual info on this occasion). ---
**Author:** ![Matej](https://avatars.discourse-cdn.com/v4/letter/m/a698b9/32.png) [@Matej](https://prepomax.discourse.group/u/Matej)\ **Post date:** [July 9, 2024, 11:59am UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852/6 "2024-07-09T11:59:36Z")
> [@FEAnalyst](#): > > I can contact Guido regarding this. I think this would be perfect. ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [July 10, 2024, 8:24am UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852/7 "2024-07-10T08:24:17Z")
I emailed Guido. I will let you know if he replies (usually takes a while). ---
**Author:** ![FEAnalyst](https://yyz2.discourse-cdn.com/free1/user_avatar/prepomax.discourse.group/feanalyst/32/688_2.png) [@FEAnalyst](https://prepomax.discourse.group/u/FEAnalyst)\ **Post date:** [July 11, 2024, 7:18am UTC](https://prepomax.discourse.group/t/cylindrical-coordinate-system-rotational-dofs/1852/8 "2024-07-11T07:18:20Z")
Guido’s reply to this question: > I do not think it is safe to use a transformation on nodes belonging to 1D or 2D elements, however, I have to check that in detail. P.S. New CalculiX version should be released by the end of July. Guido will try to fix some of the issues pointed out on GitHub.