Romax - Recent Threads

Powerflow and duty cycle generation

Mohit Parmar — Mon, 05 Oct 2026 02:15:21 GMT

Why does "Powerflows in file(s) do not exactly match powerflows in duty cycle" error occur?

(This Q&A has been posted by Romax Technical Support team for the benefit of our community members)

Romax SafeNet licensing and AWS

Mohit Parmar — Wed, 30 Sep 2026 08:14:45 GMT

Can I set up Romax SafeNet licensing with Amazon Web Services (AWS)?

(This Q&A has been posted by Romax Technical Support team for the benefit of our community members)

Bearing Internal Clearance

Pandurang Naik — Fri, 04 Sep 2026 03:45:03 GMT

Can we consider shaft/housing roughness in the calculation of internal clearance of bearing?

(This Q&A has been posted by Cadence Technical Support for the benefit of our community members)

Gears

Pandurang Naik — Tue, 04 Aug 2026 03:48:58 GMT

Why does the film thickness result change when the surface roughness "Ra" is altered in the ISO/TR 15144 model, even though the formula (4) does not explicitly include "Ra"?

(This Q&A has been posted by Cadence Technical Support for the benefit of our community members)

A harmonic response problem considering gyroscopic effect in Romax software

Qiang Wu — Wed, 29 Jul 2026 22:24:18 GMT

Dear Experts on Romax Software,

I have recently modeled a single shaft with two rigid connections, two discs and two dynamic unbalanced loads, as shown below:

The corresponding harmonic response computation yields both frequency response curves and the corresponding resonance peaks. When I ran the same simulation in a rotordynamics software from the Professor Friswell M.I (《Dynamics of rotating machines》), I found that the resonance peak amplitude of Romax is essentially the same as the result from Friswell software when the gyroscopic effect of the dynamic discs is not considered, rather than when it is taken into account. How is the gyroscopic effect of a dynamic rotor disc configured in Romax? How is the gyroscopic effect of a shaft configured in Romax?

Thank you very much for taking the time to read my question!

Shaft Nodes

Vaishali Bakshi — Mon, 27 Jul 2026 22:13:16 GMT

How Nodes are Generated on Shafts in RomaxDT?

(This Q&A has been posted by Cadence Technical Support for the benefit of our community members)

Safety Factor

Pandurang Naik — Tue, 14 Jul 2026 05:01:10 GMT

What is the difference between duty cycle safety factor and load case safety factor of a gear?

(This Q&A has been posted by Cadence Technical Support for the benefit of our community members)

Mean finished profile shift for splines

Mohit Parmar — Fri, 10 Jul 2026 07:28:03 GMT

What is the mean finished profile shift for splines?

(This Q&A has been posted by Romax Technical Support team for the benefit of our community members)

Effect of Planet Pin Interference Fit on Tooth Load Distribution

shuang mu — Wed, 08 Jul 2026 09:22:52 GMT

How should the interference fit between the planet carrier and the planet pins be defined? Will the fit between the pins and the corresponding bores affect the tooth flank load distribution per unit face width?

Bearing forces

Pandurang Naik — Tue, 30 Jun 2026 01:26:38 GMT

Why does a tapered roller bearing experience additional axial load?

(This Q&A has been posted by Cadence Technical Support for the benefit of our community members)

Advanced tooth stiffness for micro-geometry and bending results

Mohit Parmar — Tue, 23 Jun 2026 06:38:43 GMT

What happens to bending results when the advanced tooth stiffness is selected for micro-geometry analysis with K-Hbeta set as calculated?

(This Q&A has been posted by Romax Technical Support team for the benefit of our community members)

Gear

Pandurang Naik — Wed, 17 Jun 2026 01:12:02 GMT

Can we Change Center Distance of Detailed Gear in RomaxDT?

(This Q&A has been posted by Cadence Technical Support for the benefit of our community members)

Model comparison

Mohit Parmar — Tue, 26 May 2026 07:25:06 GMT

How do I compare similar Romax models to find differences?

(This Q&A has been posted by Romax Technical Support team for the benefit of our community members)

Gear Rating

Pandurang Naik — Mon, 06 Apr 2026 04:08:41 GMT

What is the difference between duty cycle safety factor and load case safety factor of a gear?

(This Q&A has been posted by Hexagon Technical Support for the benefit of our community members)

Flash temperature difference with 6D and ISO

Mohit Parmar — Fri, 13 Mar 2026 07:18:39 GMT

Why is the flash temperature difference so high between 2 gears in mesh?

(This Q&A has been posted by Hexagon Technical Support for the benefit of our community members)

Planetary carrier pin converted to FE shaft

wu han — Wed, 25 Feb 2026 07:41:33 GMT

When modeling planetary gears using RoMAX 2024.1 software, the planetary gear pins of single-arm (cantilever) planetary carriers cannot be processed using FE (Feature Element) technology. This issue remains unresolved.

Double Flank Contact

Pandurang Naik — Fri, 06 Feb 2026 08:24:19 GMT

At which stage we should use "Prevent Double Flank Contact" setting from Analysis settings?

(This Q&A has been posted by Hexagon Technical Support for the benefit of our community members)

A Problem Associated with Damping Parameters of Bearings and Rotating Shafts in the Romax Software?

Qiang Wu — Sat, 17 Jan 2026 02:14:29 GMT

Dear Experts in Romax Software,

The configuration of damping parameters for bearings and shafts is crucial during the dynamic analysis of shafting systems. The general dynamical equation of shafting systems is presented as follows:

For the sake of simplicity, the stiffness bearing is adopted, whose parameter settings are presented below.

Which type of damping does this damping parameter correspond to (Rayleigh damping, Coulomb damping, modal damping or Viscous damping)? What is its relationship with the bearing stiffness matrix Kb? How to add the bearing damping matrix in the same way as the stiffness bearing?

Additionally, how to set the structural damping, Rayleigh damping, and modal damping for a shaft?The corresponding configuration pages have not been located.

There are damping parameter settings in the NVH analysis configuration panel. Does the damping referred to here correspond to the shaft damping?

Thank you very much to all respected experts for taking the time out of your busy work to look into my questions！

Reverse Bending effect consideration

Vaishali Bakshi — Fri, 16 Jan 2026 00:03:17 GMT

Does Romax products automatically accounts for reverse bending for idler gears?

Large radial angle displacements.

Mark Duignan — Fri, 19 Dec 2025 08:12:27 GMT

In Romax, what causes large radial angle displacements ~179 degree between the inner and outer races of bearings? The model seems to rotationally "wind-up" excessively before torque is transferred.

Acoustic Analysis

Pandurang Naik — Wed, 10 Dec 2025 22:55:54 GMT

What causes the Reference Position of the Microphone Location to change during acoustic analysis in Romax Spectrum?

(This Q&A has been posted by Hexagon Technical Support for the benefit of our community members)

Analysis proceeds infinitely in a Condense FE model

Gimuyng Gwack — Tue, 09 Dec 2025 02:24:25 GMT

I'm currently creating an FE model using Inventor's NASTRA analysis. I recently discovered that changing the extension of the .nas file generated after a normal mode analysis to .dat saves the geometry, stiffness, and modal analysis information.

The problem is that when I import the FE model and run a Codense FE model, the analysis proceeds infinitely and then fails.

There are rigid connections between the bearings connected to the FE model. If I remove these connections and run the Codense FE model, the analysis proceeds normally.

Has anyone experienced infinite analysis or failure when analyzing a Codense FE model with rigid connections?

Romax Tutorial Documentation

Gimuyng Gwack — Tue, 09 Dec 2025 02:14:56 GMT

I looked for a ROMAX-related tab in the Document Center on the NEXUS website, but it says there's no related content.
I have the tutorial files from a previous training session, but I'd like to find the missing parts.

Where can I find the ROMAX tutorial?

The link below is to the Romax Document Center.

https://nexus.hexagon.com/documentationcenter/ko-KR/bundle?labelkey=prod-romax-public&fromSlug=romax

Bevel Gear

Pandurang Naik — Fri, 21 Nov 2025 01:50:39 GMT

Can We Import TE Values for Bevel Gear Set From External Software and do NVH in Romax?

(This Q&A has been posted by Hexagon Technical Support for the benefit of our community members)

Efficiency Analysis

Pandurang Naik — Tue, 04 Nov 2025 23:30:56 GMT

Can we perform gearbox efficiency analysis in Romax? which components are taken into account?

(This Q&A has been posted by Hexagon Technical Support for the benefit of our community members)