I once watched a maintenance technician stand beside a stalled robotic cell and sigh. The cell had been upgraded three times in two years, each time with an extra sensor, an extra safety layer or an extra software module, and each time it had become a little harder to keep running. “We keep fixing it by building it bigger,” she said. “Nobody ever asks what we could take off.” That remark is the seed of this article. In robotics operations, a handful of comfortable beliefs push teams toward adding, and each one deserves a gentle challenge. Here are six myths, with the human reality behind each.
Myth 1: More sensors always mean a smarter robot
It is easy to believe that every extra sensor gives the machine a better picture of the world. In practice, each sensor brings wiring, calibration, a software driver and a new way to fail. Readings can disagree, and the control software must decide which to trust. A cell with many overlapping sensors may spend more time resolving conflicts than doing work.
That does not make sensors the enemy. Understanding what each one contributes is the key, and a clear explanation of how sensors are woven into industrial robots helps teams see why integration effort grows with every addition. A useful review question is simple: if this sensor disappeared tomorrow, which decision would the robot get wrong? If nobody can answer, the sensor may be decoration.
Myth 2: A longer program is a more capable program
Robot programs grow by accretion. A special case for one product variant, a delay inserted after a mysterious fault, a retry loop that nobody remembers adding. Years later, the program is hundreds of lines of exceptions, and the people who understand it have moved on.
The reality is that a shorter program is easier to read, easier to test and easier to hand over. Operators who periodically walk through a program removing steps that have no visible purpose, one at a time and with the cell in a safe state, often find it behaves the same or better. Always do this under your site’s proper change procedures and with whoever is responsible for safety signed in. Removal in a robotic cell is not casual.
Myth 3: Every fault deserves a new fix bolted on
After an incident, the natural response is to add something that would have prevented it: a guide rail, a sensor, a timing delay. Over time these patches pile up around the original weakness, and the weakness itself stays right where it was.
A calmer alternative is to ask whether the fault can be designed out. If a part keeps jamming at the same fixture, a small change to the fixture may remove the need for any patch at all. The best answer to a recurring problem is often to take away the condition that produces it. Technicians who have lived with a stubborn jam for months tell me the relief of finally cutting the cause, rather than adding another workaround, is hard to describe.
Myth 4: More robots mean more output
Adding machines to a line seems like the surest route to throughput. But output depends on the slowest point in the flow. Place another robot upstream of a bottleneck and you simply build a longer queue. Fleets of mobile vehicles show the same pattern: crowd a warehouse floor and travel times rise, traffic rules grow complicated and congestion appears.
Anyone planning warehouse automation can find useful context in a guide to automated guided vehicles in warehouse settings. The operational lesson that experienced teams repeat is to understand the flow first. Sometimes removing a stop, a handoff or a needless route does more for throughput than any new vehicle.
Myth 5: Extra safety layers are always safer
This is the delicate one, so a careful word is needed. Proper safeguarding of robots is mandatory and governed by recognised standards and local regulation; nothing here suggests removing required protections. The myth is different: the belief that piling on informal extras, such as unofficial workarounds, extra signs nobody reads and ad hoc procedures, improves safety.
People notice a cluttered safety environment less, not more. A sign that is one of twenty is ignored. A clear, well-placed, required safeguard that stands alone gets attention. Where teams review their safety documentation with qualified safety personnel, they sometimes find duplicated or contradictory instructions that confuse workers. Consolidating them into clear, correct guidance, with the right people leading the review, is a way of making the environment safer by subtraction. Any change to actual safeguarding belongs with competent safety professionals, never with a casual tidy-up.
Myth 6: Removing something is a step backward
The last myth holds the rest in place. Technicians and managers alike feel that taking out a module, a sensor or a procedure is an admission of failure, a sign that the original investment was wasted. So things stay, collecting dust and cost.
The healthier view is that systems are living things. Needs change, products change, and what was right two years ago may be wrong today. A team that can retire a component gracefully is a team that learns. The technician in my opening story eventually proposed removing the second of the three add-on modules, with the cell’s engineers and safety lead involved. They tested it, kept a way back, and found that the machine ran more steadily. It was a small change, but she smiled when she told me about it.
What these myths share
Every one of them rests on an unspoken assumption that problems come from absence. A missing sensor, a missing alarm, a missing robot. Often the problem comes from presence: too much for the people and the software to hold in their heads. Operations teams who learn to ask “what could come off?” tend to build calmer, steadier cells, and their colleagues tend to enjoy working with them.
That is not a case for minimalism as an ideology. Real requirements, safety rules and customer needs set the floor below which nothing can be removed. Above that floor, though, there is almost always some slack, and finding it takes a patient eye and a willingness to listen to the people who work beside the machines.
It is worth saying how people feel during all this. Operators often grow attached to the quirks of their cell, even the awkward ones, because they have learned to work around them. Taking something away can feel like losing a familiar colleague. Acknowledge that. Invite the people who run the machine to veto a removal they think is unwise, and take their concerns seriously, since their knowledge of the cell’s moods is rarely written down anywhere. Changes that the operators help choose tend to stick, while changes imposed from an office tend to be quietly reversed.
A gentle routine for your own cell
- Walk the cell with the people who run it and ask what they work around.
- List the components, steps and procedures that nobody can explain.
- Rank them by risk of removal, and begin with the least risky.
- Make each change through your normal procedures, with the right people involved and a way back.
- Watch for a few weeks, then write down what you learned.
Telling the story
Teams who learn something this way often want to pass it on. A short, honest account of what you removed and what happened can help another plant a continent away. One place to do it is BlogOrbix, a site that says it is free and wants to be a calm, focused setting for writers, a venue where an engineer or technician could publish such a note, without needing to build a website first.
One last thought
Automation has a reputation for being about more: more speed, more machines, more data. The people who keep it running know that the best days are the quiet ones, when little goes wrong because little is there to go wrong. Next time a cell stalls, before reaching for another sensor, another alarm or another module, sit down with the technician who knows it best and ask the question that started this article: what could we take off?
