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Connect in three steps

1

Sign in

Go to app.cosmon.com and sign in with your Cosmon account.
2

Install the Cosmon Connector

Download and install the Cosmon Connector on your engineering workstation. This is the bridge between Nexus and your installed CAD/CAE software.
The Connector runs locally on your machine. Your files and models never leave your workstation without your explicit action.
3

Open your software and connect

Launch SolidWorks, Ansys, COMSOL, or Abaqus. The Connector will detect the running application and establish a connection automatically. You’ll see a status indicator in the Nexus interface confirming the link.

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Your first prompt

Once connected, try a simple command to confirm everything is working. In SolidWorks: 
Open a new part and create a 50mm x 50mm x 10mm rectangular block.
In Ansys Mechanical: 
What's the current state of the model? List the boundary conditions and any active load steps.
Nexus will describe what it’s doing and confirm the result.

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Prompting Guide

The quality of your results depends on how you prompt. These eight rules will help you get reliable, precise outputs from Nexus every time.

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1. Lead with outcome

Start with what you’re trying to achieve, not the specific operations you think are needed. Nexus can figure out the steps — your job is to define the goal.

Better

“Create a support bracket that can withstand a 200N downward load at the free end with a safety factor of 2 or greater.”

Worse

“Add a fillet here and make the wall thicker.”

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2. Be specific

Include exact values: dimensions, tolerances, material grades, load magnitudes, mesh sizes. Precision in equals precision out. 
Create a cylindrical boss, diameter 12mm, height 8mm, centred on the top face of the bracket. Add a 1mm chamfer on the top edge.

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3. Give file paths

When referencing parts, assemblies, or simulation files, include the full path. This removes ambiguity and ensures Nexus acts on the right file. 
Open C:/Projects/Arm_Assembly/arm_v4.SLDASM and suppress the Cover_Plate component.

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4. State what should not change

Tell Nexus which features, constraints, or dimensions are locked. This is especially important when editing existing models. 
Increase the rib thickness from 3mm to 5mm. Do not change the bolt hole pattern or the outer profile.

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5. Chain steps

For multi-step workflows, list the steps explicitly and in order. Nexus will confirm progress at each stage before moving on. 
1. Apply Structural Steel to all bodies.
2. Mesh using a 3mm element size with refinement at fillets.
3. Apply a fixed support at the base face.
4. Apply a 500N force in the -Y direction on the top face.
5. Run the static structural analysis.

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6. Attach context

Share relevant background: design specs, applicable standards, prior results, or customer requirements. This helps Nexus make better decisions throughout the task. 
This bracket must comply with ISO 2768-m tolerancing. The part will be injection-moulded in PA66-GF30. Wall thickness must stay between 2.5mm and 4mm for uniform cooling.

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7. Describe symptoms when debugging

When something isn’t working, describe what you observe — not the fix you think is needed. Nexus diagnoses better from symptoms.

Better

“The solver is failing at step 3 with: ‘Highly distorted elements detected near node 4521.’ It’s happening at the sharp re-entrant corner on the inner rib.”

Worse

“Fix the mesh error.”

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8. Iterate

You don’t need to get the perfect prompt first time. Start with a clear goal, review the result, then refine. Nexus maintains context across the conversation. 
That looks good. Now reduce the fillet radius to 2mm, re-run the mesh, and check whether the maximum stress changes significantly.