MINIMUM ANGLE OF RESOLUTION CALCULATOR UPDATE

There are various ways to measure and specify visual acuity, depending on the type of acuity task used. This may be thought of as the ability of the eye to see fine detail. This refers to the smaller pulley because the larger pulley always has more than 180 degrees.Visual acuity is the spatial resolving capacity of the visual system. Minimum Wrap Angle: This tells you how much of the pulley is being gripped by the belt. Above starts getting sloppy so you will want a tensioner, or maybe go up in pulley size. If you have a set Center Distance you will probably have some slack (but not much thanks to our many belt sizes!). A 3mm pitch belt has 1 tooth every 3mm, so a 100T belt will be 300mm long.īelt slack: A perfectly tensioned belt will have no slack. Pulley Ratio: (Pulley 1 Pitch Diameter / Pulley 2 Pitch Diameter) OR (Pulley 1 RPM / Pulley 2 RPM)Ĭenter Distance: Distance between the center of rotation of Pulley 1 and Pulley 2.īelt Length: If you were to cut a belt and lay it flat, it would be this long. Pitch Diameter: Coincides with the circle made by the reinforcing cord of the timing belt. The Minimum Belt Wrap Angle tells you that the smaller pulley will be using 47% (169/360degrees) of its teeth (in this case, 7 teeth). The Pulley 2 RPM shows you that your blade will spin at 7000RPM. (Otherwise the 1.4mm of slack will be used in the calculation!)Ĭlick CALCULATE again to see the perfect Center Distance of 3.028'.

MINIMUM ANGLE OF RESOLUTION CALCULATOR UPDATE

To get your exact Center Distance, you now select the Belt Length as Set, and update the Belt Length by changing the dropdown to something else then back to 74 Tooth. The Belt Length dropdown will show a 74 Tooth belt with 1.4mm of slack. Make sure the Pulley Ratio is checked as Variable, and the Center Distance and Pulley 1 RPM are checked as Set.Ĭlick CALCULATE and the Pulley Ratio will show you '0.5 to 1', meaning your Pulley 2 will be turning at half the speed of Pulley 1. Type '3' into the Center to Center inch distance. Select 15T and 30T from the pulley dropdowns. You have around 3' between the weapon motor and blade shaft (axle) but it can change a bit. You have a weapon motor that spins at 14000rpm but you would prefer your titanium blade to spin at 7000rpm. Make sure the Pulley Ratio is checked as Variable, and the Center Distance is checked as Set.Ĭlick the CALCULATE button and watch as the Belt Length dropdown selects the appropriate size of belt (100 Tooth) and tells you that there will be 1mm of belt slack.Įxample 2: You know the pulley ratio required and want to find the distance between pulleys. Type '5' into the Center to Center inch distance. (The pitch diameter automatically updates.) Select the 15T pulleys from both pulley dropdowns. Your front wheels are 5' from your back wheels. To keep weight down you have chosen to use 15T pulleys. Say your robot has one drive motor per side but you want to make it four-wheel-drive by belt driving the two other wheels. (The calculator even works for different pitch!)Įxamples and definitions can be found below the calculator.Įxample 1: You know the distance available between the pulleys and want to find the belt size. If you are using sizes we don't sell, simply type the dimensions into the text boxes and ignore the dropdowns. The dropdowns show all of the FingerTech pulley and belt sizes for easy selection.

Minimum angle of resolution calculator