I Was Wrong About Modular Conveyors: Why 'Everything' Vendor Isn't the Answer

I don't support 'everything' vendors. And that’s not a knock on integration—it’s a conclusion I came to after a very expensive lesson.

Three years ago, I would’ve argued the opposite. Give me the company that supplies the belt, the motor, the controls, the software, and the support. One throat to choke, right? That’s what I thought. Then, in Q1 2022, we approved a full-system integrator for a 50,000-unit order. They promised a seamless solution. What we got was a nightmare of compatibility issues—drives that didn't talk to the control logic, rollers that couldn't handle the load spec, and a field service team that spent more time troubleshooting than commissioning.

The rework cost us $22,000 and delayed the launch by six weeks. That’s when my thinking shifted.

It Took Me 3 Years and About 120 Orders to Learn This

The gradual realization: there’s a huge difference between integration and ownership. Just because a vendor owns the whole stack doesn’t mean it’s optimized. In fact, more often than not, the “everything” vendor is a generalist spreading thin across a dozen product lines.

Interroll doesn't do that. They don't make the software, they don't build the full system—they make the core moving parts: motorized rollers, drum motors, drives, and modular conveyor components. That’s it. Period. And they do it globally (Germany, US, Brazil, Thailand—you name it). Standardized platform. Repeatable. Predictable.

Bottom line: specialists own their tolerances. Generalists inherit everyone else’s.

My Trigger Event: The Wiring Diagram Disaster

I didn't fully understand this until a specific incident in March 2023. We needed to retrofit a sorter line in a DC. The original vendor had bundled everything—conveyors, drives, controls, wiring harness—from multiple in-house divisions. The wiring diagram was a mess. It didn’t follow any standard layout. Our maintenance team wasted three days tracing cables.

Compare that to an Interroll install I oversaw last year. They shipped a standardized wiring diagram for every zone. Every motorized roller was pre-identified. Every connector color-coded. The techs had the system up in two days. No rework.

That’s the difference between a platform and a kit.

What Modular Really Costs (and Saves)

Let’s get specific about cost. I ran a blind comparison on one of our $18,000 projects: Interroll EC310 drive-controlled rollers vs. a competitor’s “compatible” drive kit.

• Interroll rollers: $X per unit (higher upfront)
• Integration time: 40% less
• Fault rate in first 6 months: <1%
• Replacement parts availability: next-day (regional hub)

The competitor’s kit was $Y per unit (about 15% cheaper). Integration took twice as long—because the wiring standard was proprietary. Fault rate? About 4%. That’s 4x our internal threshold.

Now, on a 50,000-unit annual order, the difference in downtime alone is significant. 4% faults = 2,000 units needing attention. Each fix costs about $150 in labor and lost throughput. That’s $300,000 in hidden cost. The upfront saving? About $7,500. You do the math.

“The cheapest part is rarely the cheapest solution.” – Industry saying I’ve adopted.

The Expertise Boundary: Why Interroll Says 'No' to Some Things

Here’s what I respect most: Interroll will tell you when their product isn’t the right fit. I’ve seen it happen. A client wanted to use a heavy-duty pallet mover for a high-speed sortation application. The Interroll engineer said: “This isn’t our strength for that speed. Here’s who does it better.”

That honesty earned him more business on everything else. Because when a specialist says “I don’t do that,” I trust them on what they do do.

A vendor who says they can do everything is a vendor who hasn’t tested everything.

Counter-Argument: 'But Integration Saves Management Time'

I hear this one a lot. “It’s easier to manage one vendor for the whole system.”

Here’s the reality: managing one vendor who’s OK at everything is harder than managing two specialists who excel at their pieces. The coordination cost is lower when each piece drops in with documented, tested interfaces. Standardized platforms like Interroll’s are designed to plug into third-party controls and software. They don’t need hand-holding.

Plus, when something breaks, a single call to the specialist gets the right part and the right fix. No finger-pointing between divisions. No “it’s the motor, call them” when the motor is theirs.

Final Word

“We can’t be everything to everyone—and that’s our advantage.” That’s the line that changed my procurement philosophy. Interroll’s commitment to modular, standardized platforms isn’t a limitation; it’s a quality guarantee. They know their product inside out. They test it. They support it globally. And they’ll tell you when you need someone else.

So, if you’re evaluating material handling components, ask yourself: do I want a vendor who claims to own the whole pipeline, or one who owns the critical moving parts with zero ambiguity?

I’ve made my choice. I’d pick the specialist—every time.