Vertical Lift Modules (VLM) vs. Vertical Carousels: Which is Right for Your Facility?

Choosing between a Vertical Lift Module (VLM) and a Vertical Carousel is one of the most critical decisions in warehouse automation. While both utilize your facility’s vertical footprint to reclaim up to 85% of floor space, their mechanical “DNA” is completely different.

At White Systems, we’ve engineered and serviced both for 80 years. Here is the engineering breakdown to help you choose the right technology for your workflow.

A VLM, like our PowerColumn 3 (PC3), operates using an internal elevator that travels between two columns of trays.

• How it Works: The elevator extracts only the specific tray needed and delivers it to the operator.

• The “Height” Advantage: Because the elevator only moves one tray at a time, the machine can be incredibly tall—reaching the very top of your 60-foot ceilings.

• Dynamic Storage: VLMs use sensors to measure the height of every tray. If you put a 4-inch tall box on a tray, the VLM stores it in a 4-inch slot. This eliminates “air” in your storage and maximizes density.

• Best For: Facilities with high ceilings, heavy industrial parts, or inventory with unpredictable heights.

Choose a VLM if:

• You have varying load weights and heights.

• You need to store heavy pallets or large engine components (especially with the PC3).

• You have ceilings over 30 feet and want to maximize every inch.

• You require Rack and Pinion durability for 24/7 industrial use.

Choose a Vertical Carousel if:

• Your inventory consists of uniform totes or small parts.

• You have limited floor space but standard ceiling heights.

• You need ultra-fast retrieval for high-volume, small-item orders.

• You are looking for a cost-effective entry into goods-to-person automation.

Still not sure which system provides the best ROI for your space? Don’t guess—let us run the numbers. As an American OEM with 80 years of integration experience, we provide factory-direct analysis to ensure you get the right machine for the job.

The Vertical Carousel functions as a continuous loop of carriers that rotate to bring your inventory directly to the operator. By keeping all items in a constant ‘ready’ state, it provides exceptionally fast retrieval for uniform goods. This is the optimal choice for high-frequency picking, kitting, and standard-sized bins in facilities with heights under 30 feet.

White Systems builds high-performance Vertical Lift Modules for fast tray delivery, high-density storage, and accurate goods-to-person picking. Our U.S.-based service team supports every system, and our dual-tray and rack-and-pinion designs help customers reduce walking, increase throughput, and reclaim up to 85% of floor space.