Learning Center > Sizing Considerations
Learning Center > Sizing Considerations
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LOSTPED + S
LOSTPED is an acronym that stands for Load, Orientation, Speed, Precision, Environment and Duty Cycle. It is used for specifying components and systems for automation and robotics equipment. If you use the same methodology for this and just leave out what is not relevant you will cover your bases.
Loads - What are the loads you want to support
Orientation - What is the general orientation of the system and how many axis are involved. Where are the loads in relation to support connections and center of gravity . Do this for x, y and z axis as well as cantilevered loads around the mounting points.
Speed - Not relevant unless you motorize a telescoping section or you have a post on something that moves. If so, you need to not only consider velocity, but more important is acceleration and deceleration as those translate to forces and loading.
Travel - For telescoping applications what is the full range of travel you want to see up and down and rotationally. For brackets that spin and pivot up and down, what is the range of angular motion desired or needed
Precision - What is the level of positioning accuracy and/or repeatability desired for any given motion or adjustment. What is the resolution available for adjustments. In this case most are like full analog with no defined steps. but no inherent measuring systems or defined stops.
Environment - What might affect the material in use. What might affect motion components.
Duty Cycle - How often will any moving parts be moved and how far.
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Standardization - If you are going to build many stands or manage a fleet of them, you may also want to consider standardization. That may be standards on tube heights or base plate configurations or mounting configurations.
With that education, you can now not only try to size static stands you can venture into robotics as well.
Post Height Sizing for Monitor Stands
For single monitors
The post height needs to be a minimum of the distance from the bottom of the monitor to the center of the bolt hole pattern plus 1" for the bracket. That assumes you would only need one bracket for monitor plate support. If you want to use two you need to add another 2.5". If you want a taller post, if you get one that is just the height of the monitor, you can fit the monitor in a constrained space that is simply the height of the monitor/post plus any base it's mounted to.
For two monitors on telescoping post
if you want to put both monitors on a single telescoping section, it needs to be the height of the monitor plus 2" at a minimum. Add 2.5" more if you will need a heavy weight support bracket for either of the monitors.
Alternatively you can create two smalls sliding sections that only need be about 4" or so, but you will want to use a bushing to keep them perpendicular and you will need one telescoping coupling for each monitor.
The internal post, by default can be the same height as the telescoping part, but it could also be shorter for some reason. For that matter it can be longer and/or much longer if you don't mind it sticking up past the monitors.
Column Strength - 1/2" vs 3/4" EMT Pipe
At this time we have only built out monitor systems with 1/2" and 3/4" EMT.
1/2" tubing gets wobbly with a a 7 pound monitor above about 4' and hanging about 3" from post center of gravity. It's not going anywhere but moves a bit like a corn stalk or bamboo shoot might. .
3/4" tubing does not flex with a 7 pound load 6' in the air.
Bracket Strength - 3 axis and 3/4 axis combo bracket
The 3 axis and 3/4 axis brackets and composite mounting plate need no additional support for 21" monitors and lower that weigh 7 pounds or less. We believe they will hold more but have not tested them yet.
For heavy loads:
For 3 axis brackets support, two can be attached to a single mounting plate. That eliminates the rotation capability but greatly increases load. Likewise you could put the 2nd bracket below the first but not attach it to the monitor plate. instead put a felt pad on it, and get the support but maintain rotation ability.
For 3-4 Axix brackets you can add a multi-use slide bracket . It can be attached to the monitor mounting plate or it can be lef to float with a felt pad allowing for a little rotational motion
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