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Category: Safety

What is the requirement for robot cell fencing with regards to robot impact strength? I have heard people say a "robot rated" fence is needed in certain circumstances but I can't find the term "robot rated" fence in the RIA standard.

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Where I am walking into a light screen where the robot is picking off the operator side of a turn table, while work is being performed on the other side. I am using the standard formula of US CAN: Ds =K x(Ts + Tc + Tr + Tbm) + Dpf. I was able to find values for each, but the standard K constant of 1600 mm/sec doesn't seem to be the correct constant for this scenario. Ds=('K'*(600+50+23))+78.625. K is a hand speed constant and as my feet and hands can move I would think the value would increase. The standard says it could be 1600-2500 and that would be determined through a risk assessment. How do I determine a speed constant through a risk assessment?

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What are the minimum requirements for guarding an articulated arm robot?

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I've seen a number of references to a requirement minimum distance between a robot and guarding, specifically to prevent trapping a person between the robot and guard. I have been able to find no other requirement, and infact in ANSI/RIA R15.06-2012, Part 2 5.4.2 Establishing safeguards and restricted spaces, it states "The perimeter safeguards shall not be installed closer to the hazard than the restricted space. If the perimeter safeguard is designed to be the limiting device in accordance with 5.4.3, then the perimeter safeguard establishes a portion of the boundary for both the safeguarded and restricted spaces." This means the guard (provided it meets 5.4.3 requirements) can be used to stop the robot- obviously not a 'best practice' but still possible. So- where is this crushing distance coming from? 5.5.1 mentions "where crushing is prevented by the maintaining of minimum gaps, they shall meet the requirements in ISO 13854." but I'm not completely sure what "Where crushing is prevented..." really means. I've seen many, many cells that do not have any distance between the restricted space and the guards.

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Where can I find a download for the TR15.406?

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Hi! I have a question about the safety in an industrial robot cell. My goal is to reduce the risk of collisions of the robot with the fence or the cell. Therefore I am in need of safety systems and solutions, which are capable of doing this. I would be very happy about people i can contact and talk about possibilities and theories. Thank you for your help in advance.

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I want to reduce the size of a safeguarding of a workstation but I do not know the specifications that I have to follow. Could you help me please? Thanks.

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We have a large respot line that has 54 robots and is 200 feet long. The line 65 units per hour. R15.06, 10.8.4 -f states that only one person shall be allowed in the safeguarded space in T2. That is not practical. We must perform other tasks on other robots in other stages at the same time. Can I do this with a risk assessment based on our procedures?

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Are there consultant experts who can evaluate the OSHA compliance of a robotic design? If so, can someone provide a couple of contacts?

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Do collaborative robots have/require a different risk assessment than traditional robots? If so, would you please direct me to some websites with examples of collaborative robot-specific risk assessments?

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Is it required to have two means of egress in a single robotic cell?

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Was the requirement that each person entering a robot cell have an enabling device new in the 2012 standard, or was this also in earlier versions?

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Recently I heard the RIA R15.05 standard has been "canceled". What does this mean? Is that merged with other standard?

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We have multiple brands and types of welding robots in the shop that I work at. Each Cell has its own operator. Are there any safety standards or requirements about operators on duty or training of operators?

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How far from a hazard does an opening in barrier guarding larger than 120mm and lower than 1m have to be? My specific example is a rectangular opening in the guarding allowing access from inside the light curtain area to part totes kept outside the cell. It is a robot cell where there is a turntable between the operator and the robots. CAN/CSA-Z434-14 Table DVB.27.4.1 says to refer to DVB.27.2 for openings over 120mm but the tables under DVB.27.2 don't include anything lower than 1m from floor, my opening is at 800mm high for ergo reasons. CSA Z432-04 addresses opening up to 132mm but makes no mention of anything larger. My opening will be approx. 1200mm wide X 400mm tall. You cannot reach into the interior of the cell where the robots are but you can reach into the light curtain area where the operator loads parts onto the turntable. The hazard in question is the rotating turntable. To summarize: I'm located in Ontario, Canada. I have a 1200mmX400mm hole in barrier guarding leading into operator load area at 800mm from floor. There is a gravity conveyor sticking through the hole but you can stick your arm in the hole and worst case scenario, reach the turntable. How far from turntable swing radius must the hole be located? 915mm? 1.5m? More?

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What are different certifications needed for automated robot warehouse handling system? I understand the FCC, CE markings are for selling in the respective market. However would like to know if there are any further certifications that need to be applied to make product compliant for safety, functionality requirements? The product does have a wireless mechanism on it for data.

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In the RIA 15.06-2012, Part 1, Section 5.13, I interpret that "Movement without drive power" is a requirement by the robot manufacturer. Is it a requirement? If it's required by RIA, how can some robot manufacturers only offer it as an optional feature (and at additional cost)?

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We have a large robotics cell with 2 robots on a linear track per side (2) of the product. Currently, the cell's only safety protection are light curtains due to the back and forth movement of heavy material by crane. Are light curtains enough to meet the RIA safety requirement? Once an operator crosses over into the light curtains, the operator must push the reset button on the inside the cell view the surrounding for other operators and then push the reset button for full cell activation. Is that a lot of responsibility for the one operator? Should safety interlocks or hard guarding be installed to ensure safety and build in some level of redundancy? Please advise.

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Can you reach into the robot cell with a tool to perform tasks; specifically clean material from the floor by pulling or pushing the material while the robot is active and within reach of the robot/end effector? Is the cleaning tool, in this case, considered an extention of the robot/end effector?

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During loading new products in the robotic cell we need to not interrupt the production cycle of the robot so this task should be in masked time, otherwise, there well be a common zone for the robot and the operator (loading zone). For the safety of the operator, there will be two movable safety guards one inside the robotic cell from the side oh the robot the other form the side of the operator. These two guards work conversely, the one of the operator's side is opened only if the one of the robot side is closed; the control is performed by the safety unit and safety detectors. Is this measure looks compliant and sufficient according to the 2006/42/EC directive?

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