How to Verify GRAND 420C Framing Accuracy Before a Production Order

Before ordering production quantities, validate the GRAND 420C with a physical sample configured exactly as intended for the project. Examine beam shape, edge control, focus, zoom, gobos, pan and tilt accuracy, and repeatability under real operating conditions. The published specifications identify CMY mixing, beam and spot zoom, motorized focus, gobos, prisms, and animation effects, but they do not mention dedicated framing shutters. Written confirmation and sample approval should therefore be completed before the production order is released.

Sample Approval Priorities

• Request a GRAND 420C sample matching the planned production version, including lamp type, control protocol, software, and optional features.
• Evaluate projected edges throughout the 4°–32° SPOT zoom range and the 3°–18° BEAM zoom range. Check edge sharpness, consistency, focus response, and stray light.
• Test rotating and static gobos, prism effects, animation effects, CMY color mixing, and motorized focus through the control system that will be used on site.
• Conduct the inspection in a comparable environment, such as a concert venue, television studio, theater, conference hall, road show, club, or bar, because projection distance, surface type, and ambient light influence the result.

Confirm the Actual Beam-Shaping Capability

Framing performance should be treated as a documented acceptance requirement rather than assumed from the fixture category. The GRAND 420C is presented as a Beam/Spot/Wash hybrid moving head using a 420W OSRAM SIRIUS HRI lamp. Its listed features include high-resolution optics, linear motorized zoom, motorized focus, CMY mixing, gobo systems, prisms, frost, strobe, and dimming.

However, the available product information describes beam and spot zoom functions without identifying framing shutters or a separate framing system. If the installation requires precise rectangular, angled, or trapezoidal cuts, ask the supplier to state in writing whether the sample includes the required framing feature. Gobo projection, focus adjustment, and prism effects should not be considered equivalent to dedicated framing shutters.

Recommended Physical Test Procedure

Project the fixture onto a surface and from a distance that closely match the final installation. Move systematically through the 4°–32° spot range and the 3°–18° beam range. At each important setting, inspect the uniformity of the beam edge, the amount of spill, focus stability, and whether the projected shape remains controllable.

For every accepted result, record the zoom position, focus value, color setting, gobo or effect selection, and control command. Repeat the same look after pan and tilt movements. The fixture supports 360° continuous or 540° pan movement and 360° continuous or 270° tilt movement, as well as scan-position memory and automatic repositioning after unexpected movement. Confirm that the projected image returns to the intended location and that focus remains stable after repeated moves.

For broadcast, television, and film work, run the sample using the camera frame rate, shutter settings, and other conditions planned for production. Verify the stated flicker-free performance rather than relying only on the specification sheet. The listed control options include 29-channel USITT DMX-512, RDM, master-slave, and automatic operation, while Art-Net and wireless control are optional. The approval record should identify the exact control configuration used during testing.

Production Readiness Checklist

Quality and Supplier Verification

Color Imagination states that each product undergoes functional testing, burn-in testing, safety inspection, and final quality checks before shipment. The company lists CE certificate LCSB070523036E and ISO certificate GH004-2023Q0766. Its reported experience includes a Yunnan nightclub project using 3,500 stage fixtures that combined beam, wash, effect, and pixel lighting. These details can support supplier evaluation, but they do not replace approval of the exact sample configuration.

Frequently Asked Questions

Are dedicated framing shutters included with the GRAND 420C?

The supplied specifications do not identify framing shutters or an independent framing module. Ask the supplier to demonstrate and confirm the available beam-shaping function on the sample before approving a framing application.

Which functions affect framing-related results?

Check spot and beam zoom, motorized focus, rotating and static gobos, prism effects, CMY mixing, pan and tilt movement, and position repeatability. These listed functions can influence the projected image and should be tested in the intended operating setup.

What information belongs in the approval record?

Document the fixture configuration, control method, zoom and focus settings, gobo and effect selections, movement results, camera conditions where relevant, and all written statements about framing capability. Attach the approved sample criteria to the purchase order.

Conclusion

A physical GRAND 420C sample is the most reliable way to assess beam shape, edge definition, focus behavior, zoom control, and movement repeatability before committing to production. Since dedicated framing shutters are not specified, obtain written clarification and demonstrate the required function before approval. Color Imagination offers R&D, manufacturing, sales, technical support, OEM/ODM services, and complete project solutions. The stated minimum order quantity is 1, with delivery in 20–30 days after deposit. For technical solutions or support, contact jack@color-imagination.com.

About Us

Guangzhou Color Imagination LED Lighting Limited, operating under the Color Imagination brand, is a Guangzhou-based manufacturer serving professional stage, entertainment, broadcast, event, and architectural lighting markets. Founded in 2010, the company combines R&D, production, sales, and technical service, with 130 employees and a 6000SQM factory. Its engineering capabilities cover optical, mechanical, electronic, thermal, software, and lighting-control development, including OEM and ODM projects. The company holds CE certificates LCSB070523036E and LCSB070523041S and has supplied lighting solutions for clients in multiple industries.