More ways to use the same engine

Continue with desktop, AI, or direct integration

The free WebApp above is the fastest way to try RotoSpider, with an explicit mm/inch selector for display and input. The Windows app adds the complete manual workflow; MCP and WebAPI bring the same deterministic layout engine into other tools.

Windows Desktop · V0.6.1

Review, adjust, and save the full layout

Use upper/lower 2D panes and the 3D simulation, manually move molds, maintain master data, and save a reloadable Excel workbook. The 64-bit trial is a portable ZIP with no installer.

Download Windows ZIP User Manual PDF
English trial valid through 2026-09-30. Sample data is representative, not certified factory master data.
AI assistants · MCP

Ask layout questions from your assistant

Add the Streamable HTTP endpoint to an MCP-capable assistant such as Claude or Cherry Studio. It calls the real geometry engine—never an AI estimate.

https://mcp.zhihuo.net/roto/mcp
Connection and question examples
  1. In Claude: Settings → Connectors → Add custom connector, then paste the endpoint.
  2. In Cherry Studio: Settings → MCP Servers → Add → Streamable HTTP.
  3. Ask: “Can two 720×520×420 mm molds and two 640×610×380 mm molds share the 2600C arm?”
  4. Or give the same dimensions with explicit decimal _in fields.
What is MCP?
Developers · HTTPS JSON

Integrate the layout check directly

Send box or cylinder molds plus a preset machine or explicit arm geometry. Use physical _mm fields on a 0.001 mm grid or matching decimal _in aliases. Canonical results stay in physical millimetres; an optional inch display view is available.

POST https://mcp.zhihuo.net/roto/api/layout/check
OpenAPI JSON Health Check
Developer Preview · Working examples

Call RotoSpider from Python, JavaScript, curl, or PowerShell

Download runnable clients, equivalent millimetre and inch requests, and an AI-agent scheduling workflow. The examples call the public RotoSpider layout API and keep the deterministic geometry engine in charge of every fit decision.

Download Sample Code Read Package Guide Discuss Your Factory
Inside the download
  • Python 3 standard-library client
  • Node.js 18+ JavaScript client
  • curl and PowerShell examples
  • Equivalent integer-mm and decimal-inch requests
  • AI-agent scheduling boundary and factory checklist
python python/layout_check.py
Active iteration: these examples work with today's API, but the schemas and examples are not yet a frozen compatibility contract. The public RotoScheduler scheduling interface is still being shaped with rotomolders. Contact us with your arm/spider geometry, mold master data, cycle and mold-changeover times, scheduling rules, and MOM/ERP requirements.

What the geometry engine understands

From mold Need to a rotation-ready spider layout

1

Describe the molds

Enter written length, width, and height for boxes or diameter and height for cylinders, plus weight and requested Need.

2

Choose the machine arm

Scan the representative ladder or specify a straight or Offset/L arm with its spider, 3D envelope, dead height, and riser options.

3

Inspect the solved geometry

Review placed versus requested counts, clearance, balance, selected riser, 2D mounting plans, and the biaxial 3D rotation simulation.

Desktop workflow: change Need quantities, solve a mixed-mold layout, and review it in 3D simulation.

Height-aware, not just a flat circle

The placement search uses mold footprints, but each mold receives a height-specific allowable radius from the 3D rotation envelope. Straight arms use upper and lower mounting surfaces; Offset/L arms use the trimmed sphere and one selected global riser.

Boxes and cylinders are simplified engineering volumes rather than arbitrary CAD meshes. The server solve remains authoritative; the browser reconstructs and animates that returned result.

The default 300 mm (11.81102 in) clearance is mold-to-mold. Contact with the spider boundary is currently legal when the real mold footprint remains inside it.

Desktop workflow

Manual review and master-data tools

RotoSpider desktop startup window with upper, lower, and 3D views
Upper/lower mounting plans and the 3D view in one workspace.
Mixed polar ring layout with rectangular and cylinder molds
A mixed polar-ring layout with box and cylinder molds on an Offset/L arm.
RotoSpider mold master-data page and 3D preview
Editable mold master data with immediate 3D preview.

Use RotoScheduler for order-to-machine production planning around RotoSpider-validated mold groups. For container loading, use T1, T3, or U3.