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Category: Safety

I am accustomed to seeing an interlock and a provision for lockout on access doors on robot cells. When teaching the robot a lock is placed on the door to prevent it from closing and the interlock is bypassed by the controller's teach mode, which limits the robots speed. First, is this a safe practice? Second, is lockout while teaching a robot required by any standard?

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Does the RIA standard have any bearing over conveyors or other equipment within a cell/fence? I.E. a conveyor that runs parts into the cell so the robot can pick them up does not stop when the gate switch is opened. I believe this falls under our normal risk assessment program for every job a technician goes to, but I am being pressured form an individual to change the system to include the conveyors and clamping systems that are in the same cell. All pieces of equipment have local lock out/tag out stations including the air system for the clamps. Do you have any guidance?

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I have a question regarding perimeter safeguarding, or fencing. I remember in previous standard, that the requirement was to have 18" from the perimeter safeguarding to the programmed path of the robot in T1 APV. I don't see a similar requirement in the 2012 standard. What I do see is that it states that the perimeter safeguarding cannot be installed closer than the restricted space (5.4.2). Also, it states that perimeter safeguarding can the limiting device if it meets 5.4.3. Note 4 states that it can only be so if it does not have any hazardous deformations to the guard. So my questions are this: Is there something still in existence that looks at this from a T1 aspect of things and stipulates how far the fence needs to be from the operating space? Also, If I build my fencing to withstand a full force collision without hazardous deformation, can the fencing then be the restricted space? Thanks.

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Does ANSI require robots to be retrofit for the 2012 standard?

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I am finding nothing to solve my issue on any site or publication, maybe you can help. I have a screw running on a stepper motor and am trying to determine the distance for the Light Curtain or does it matter when using a Stepper motor as the stop is instantaneous? There is no 90 deg stop time like on a cam run machine or gear driven. I am writing up a Guarding program for my company and want to include this information. Any ideas?

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I am talking with some R&D individuals that have developed a system to detect what the composition of an object is and they are looking at applications that could be used in manufacturing (if there is something living, human or animal, in the area the machine will shut down or stop but if the object is something like steel / wood / fabric that is used in the manufacturing process the machine will continue). They wanted to know if any type of safety guarding system exists or if they should move towards other applications if they are duplicating current technology. Basic question from them was if an operator was in the area the robot or machine would stop if he is in an area of injury but would continue once he is out of harms way even if he is still in the cell.

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Per the standard, can a technician be inside the safety fence manually operating the robot in teach mode (slow)? Or does absolutely all robot movement have to be done while outside the fence and all gates closed?

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Where does the role of end user stop and integrator begin? How much can I change without assuming the role of integrator?

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Apparently there is a belief that only robots compliant with 15.06 2012 may be installed in new or upgraded cells in 2016. I am looking for a concise statement stating that as-manufactured robots compliant with the 1996 standard may be installed in new and upgraded cells in 2016—provided that the rest of the system meets the requirements of the 2012 standard. Please include reference to your credentials. Thanks.

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Frequently I must evaluate "pre-fabricated" robot cells that come to our facility from Japan and they often do not fully meet RIA and OSHA standards. My question is, I have received several such cells where the intent is to have two separate part load fixtures that are serviced by a single pedestal mounted robot that will be welding. There are light curtains that create to separate part load windows but nothing to prevent an operator from reaching through one window into the other side's fixture or into the robot working on the opposite fixture. Is DCS or similar work envelope limiting software adequate?

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I am installing a new robot on an injection molding machine that only has an SPi 12 interface. The controls on the machine will not support dual channel safety. How can install the robot and still be within standards?

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Why do some robot manufacturers place the "Motor Power On" Light on the robot while others don't. Is there a standard that requires this light be mounted on the robot?

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Does a mobile self-propelled stretch wrapper fall under the category of robot as defined in ANSI-RIA R15.06? Or would it fall under the category of general machinery? Here are some examples of product available on the market: http://www.robopac.com/en-IT/products/Vertical_stretch_wrapping_machines/Self_propelled_Robots/robot_s6 http://handleitinc.com/stretch-wrap-machines/stretch-wrap-machine-options/robotic-semi-automatic-stretch-wrap-machine.html

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I would like to create a guard for a machine cell conveyor that enters and exits the cell. My thought is to use a tunnel around the conveyor to guard, but I cannot find any info on guidelines for doing this. Please help. similar to ria part 2 figure c.3

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I'm aware that UL 1740 was originally developed as a certification standard for R15.06-1999. Do you know if there are plans to revise it to reference the latest RIA standard? ...or will it be withdrawn?

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I'm a student researcher working at an engineering research center in a college. The director of the center is interested in building autonomous robots in manufacturing floors that could sense presence around it (like autonomous vehicles), to reduce accidents when it's operating. We want to reduce redundancy in barrier guards, presence sensing devices, or any other safeguards, and also enhance more safety on a robot even though it could be programmed to limit movements spaces. Are there such robots that exist out there already? Is there a market for it?

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What standards are used for mobile robots which are not industrial or personal?

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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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