Has anyone ever heard or tried painting some markers or a cross on the wheel as indicators of whether the forklift driver is speeding or not?
If the cross on the wheel can be seen as a cross when moving then the forklift in moving at a moderate speed. When the cross cannot be seen on the wheel, when the forklift in motion, then the staff who is driving it, is driving at a high speed and can be spotted from far distance. Supervisory staff on rounds can immediately stop the staff and reprimand him. Apparently, this system is being adopted in Japan at the Airfreight Terminals
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Yes, but how does that tell you how fast the forklift is travelling, just from looking?
The diameter of the wheel is related to the distance the unit will travel per revolution of the drive tire. How fast it takes to travel that distance is related to the unit speed.
Why is there a need to measure the diameter of the wheel?
Very cool idea, but it does limit you to only one speed limit per vehicle (which is usually not adequate)
But I guess, once you get the calculations figured out, the costs of implementing this and mainaining it are so small that why not use it. If not for just the coolness factor.
Yes, I have seen this type of speed indicator in use in Japan at a lift truck manufacturing plant in the mid 1980's - I'm certain it has been in use before then. Japan is a very saftey consious country. As explained to me the width of the painted segment at the circumference of the tire was calculated based on the tire diameter, plant travel speed limits. From that point the segment was tapered towards the center of the tire/wheel.
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