At PwnCNC, safety and reliability is extremely important to us. Whether you're building your first Dominator CNC or upgrading your spindle system, you can feel confident knowing that the motors and VFDs included in our kits have undergone various testing and certification. We are currently working with a 3rd party testing laboratory to get our products tested as a whole unit.
This article outlines some of the compliance certifications that has already occurred, why they matter, and provides downloadable copies of the official safety testing reports, etc.
✅ CE Certification (Conformité Européenne)
Both our GPenny Spindle motors and Delixi EM61 VFDs are tested to meet CE safety standards, which ensure products conform to essential electrical, thermal, and electromagnetic safety criteria under EU law.
This includes testing for:
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Electrical insulation and leakage
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EMI (electromagnetic interference) performance
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Mechanical reliability under load
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General low-voltage safety requirements (LVD)
🧾 CE Certificates:
Please contact us for certificates →
🔒 UL Tested Motors (U.S. Safety Compliance)
Our spindle motors have also been tested under UL standards, which are among the most rigorous safety frameworks for electrical equipment in North America.
UL testing includes:
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Overload and short-circuit performance
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Insulation resistance and thermal rise
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Motor housing and cable safety
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Grounding path validation
While these motors may not carry a “UL Listed” mark (due to the complexity and cost of international listing), they are UL lab-tested and pass all criteria required for equivalent safety operation in U.S. installations.
🧾 Downloadable UL Test Report:
Please contact us for testing report →
🧠 Why This Matters
When using high-speed, high-power equipment like CNC spindles and VFDs, you’re dealing with:
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24,000 RPM motors
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110–220V AC mains power
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Long cable runs across your machine frame
Without proper electrical and safety design, this setup could be prone to:
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Electromagnetic interference (EMI)
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Overheating and fire risk
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Inconsistent VFD behavior or overloads
By using CE- and UL-tested components, we help ensure:
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Safe startup and shutdown behavior
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Stable power delivery to your spindle
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Lower risk of EMI or electrical faults
🛠️ Installation Notes
Even with certified components, safety also depends on proper installation:
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Always use a shielded cable for spindle power, properly grounded at the VFD
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Follow our spindle break-in guide → to reduce wear on startup
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For ATC systems, follow the air supply safety guidelines →
💬 Have Questions?
If you’re integrating our motors or VFDs into a custom build, or working with a shop electrician, feel free to contact our support team →. We’re happy to provide documents, clarify electrical specs, or walk through grounding best practices.
