Accuracy Budget — SCARA Precision Assembly
RSS error-stack for scara precision assembly: four dominant terms vs the process requirement.
A SCARA quoted at ±10 µm still misses a 25 µm insertion if fixturing and part shift eat the budget — the RSS sum makes that arithmetic honest. Chamfers convert the remaining error to a force event; below ~30 µm total, add compliance (RCC) rather than chasing microns.
Formula
Note: Planning-level engineering estimate — final robot selection, guarding layout and risk assessment must follow the integrator's calculations and a documented ISO 12100/10218 risk assessment.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
RSS error-stack for scara precision assembly: four dominant terms vs the process requirement. A free industrial robot kinematics & cell design tool — no sign-up, no upload, instant results in your browser.
About Accuracy Budget — SCARA Precision Assembly
Accuracy Budget — SCARA Precision Assembly computes the governing relationship e_RSS = √(e₁² + e₂² + e₃² + e₄²) — independent error sources live as you type. A SCARA quoted at ±10 µm still misses a 25 µm insertion if fixturing and part shift eat the budget — the RSS sum makes that arithmetic honest. Chamfers convert the remaining error to a force event; below ~30 µm total, add compliance (RCC) rather than chasing microns. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Accuracy Budget — SCARA Precision Assembly
- 1Enter your values — Robot repeatability, Fixture location, Part-in-gripper shift, Vision correction residual and more (sensible defaults are pre-filled).
- 2Read the live results: RSS total (±), Worst-case sum (±), Margin vs requirement.
- 3Check the "with your numbers" line to see e_RSS = √(e₁² + e₂² + e₃² + e₄²) — independent error sources substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Accuracy Budget — SCARA Precision Assembly?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula e_RSS = √(e₁² + e₂² + e₃² + e₄²) — independent error sources with authoritative sources cited on the page (ISO 9283 — Manipulating industrial robots: performance criteria; Craig, J., Introduction to Robotics: Mechanics and Control, 4th ed.)
- ✓A SCARA quoted at ±10 µm still misses a 25 µm insertion if fixturing and part shift eat the budget — the RSS sum makes that arithmetic honest.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the accuracy budget — scara precision assembly use?+
It evaluates e_RSS = √(e₁² + e₂² + e₃² + e₄²) — independent error sources, exactly as published. Sources: ISO 9283 — Manipulating industrial robots: performance criteria; Craig, J., Introduction to Robotics: Mechanics and Control, 4th ed.. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
A SCARA quoted at ±10 µm still misses a 25 µm insertion if fixturing and part shift eat the budget — the RSS sum makes that arithmetic honest. Planning-level engineering estimate — final robot selection, guarding layout and risk assessment must follow the integrator's calculations and a documented ISO 12100/10218 risk assessment.
When is this calculator the right tool for the job?+
RSS error-stack for scara precision assembly: four dominant terms vs the process requirement. A free industrial robot kinematics & cell design tool. Chamfers convert the remaining error to a force event; below ~30 µm total, add compliance (RCC) rather than chasing microns. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Do I need to install anything or create an account?+
No. The tool is pure client-side JavaScript: open the page and it works, offline once loaded, with no account, no quota and no data leaving your device.
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