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macro What is the 'Maximum Reproduction Ratio' of a lens

The reproduction ratio means the largest that you can make a subject on the film/sensor compared to its real-life size. In the case of your lens, it means that the image on the film plane will be 1/7.4, or 5/37 of the actual size of the object when it is as close as you can possibly focus the lens.

Re: I am curious about the maximum reduction ratio.

With a reduction of 10,000:1 that means the mount axis will turn at 50/10,000 RPS = 0.005 RPS, so multiplying by 360 degrees you’ll get slew rates of 1.8 degrees/sec assuming you can drive the motors that fast with the processor and software. Usable but slow and way down on the torque curve.

Why do we say that maximum reduction (63%) occurs in wire

My dear friend, 1. I think you are little confused in Elastic limit and Upper and lower yield strength. * I want to first clear this point that plastic deformation do not start at yield point. * Plastic deformation start at Elastic limit crossing....

Maximum reduction ratio 200 to 1 RC Groups

Nov 27, 2017 Discussion Maximum reduction ratio 200 to 1 Electric Heli Talk

Deep Drawing Operation (With Diagram)| Press Working

The maximum thinning is occurring at the lowest part of the vertical wall adjacent to the bottom of the cup. Drawing Ratio: An another important variable is the drawing ratio, which can be defined as determine the diameter at different stages of redraw. Assume, reduction in 1st, 2nd, and 3rd draw are 47%, 23%, and 17%, respectively

Earplug & Noise Reduction Ratings Explained

Given the previous example, your noise reduction equation would look like the following: (33-7)/2 = 13. This means that if you are at a rock concert with a level of noise exposure at 100 dB and you are wearing a hearing protector with an NRR 33 dB, your new level of noise exposure is 87 dB. If you are wearing a product with an NRR of 27 it

Maximum gear ratios Practical Machinist

Jun 22, 2006 Is there a rule or some design factor that determines what is the maximum useful gear ratio in a spur gear system? Seems to me that one could have a small gear driving a great big one to achieve huge reduction ratios only limited by how big a gear one can make or house.

Caluclating Forging Reductions Forging

A: Forging reduction is generally considered to be the amount of cross-sectional reduction taking place during drawing out of a bar or billet. The original cross-section divided by the final cross-section is the forging ratio (say 3:1). There is an equivalent reduction on upsetting for forgings being upset during forging (gear blanks, for example).

How is the drive ratio of a roller chain drive calculated

The maximum recommended ratio for a single reduction is 7:1. In practice, the practical single reduction limit is affect by the minimum size of the small sprocket, the maximum size of the large sprocket, and the need for sufficient wrap on the small sprocket. For ratios larger than 7:1, a double reduction is preferred.

Re: I am curious about the maximum reduction ratio.

With a reduction of 10,000:1 that means the mount axis will turn at 50/10,000 RPS = 0.005 RPS, so multiplying by 360 degrees you’ll get slew rates of 1.8 degrees/sec assuming you can drive the motors that fast with the processor and software. Usable but slow and way down on the torque curve.

Deep Drawing Operation (With Diagram)| Press Working

The maximum thinning is occurring at the lowest part of the vertical wall adjacent to the bottom of the cup. Drawing Ratio: An another important variable is the drawing ratio, which can be defined as determine the diameter at different stages of redraw. Assume, reduction in 1st, 2nd, and 3rd draw are 47%, 23%, and 17%, respectively

Maximum reduction ratio 200 to 1 RC Groups

Nov 27, 2017 Discussion Maximum reduction ratio 200 to 1 Electric Heli Talk

What are Reduction Gears? What is Gear Reduction? Bright

Reduction gear is an arrangement by which an input speed can be lowered for a requirement of slower output speed, with same or more output torque. A reduction gear assembly consists of a set of rotating gears connected to a wheel work. The high speed incoming motion from the wheel work is transmitted to the set of rotating gears, wherein the motion or torque is changed.

Planetary gear ratios Machine Design

For example, the maximum number of planet gears in a system with a 10:1 ratio is 3. What is one common pitfall? Often, designers specify gearsets with a 10:1 ratio because the mental math is

What Is the Noise Reduction Rating (NRR) and How to Use It?

Aug 10, 2018 What is the Noise Reduction Rating (NRR)? The NRR is a single number rating given in decibels. Every hearing protector sold in the U.S. has to have an NRR-label as per EPA regulation.It was devised to give purchasers and users of hearing protection a guideline what level of noise protection they can expect from their earplugs or earmuffs when properly fitted.

Maximum transmission ratio of a spur gear pair Physics

Aug 05, 2013 That can reduce the weight so when multi-stage reduction is used for more than a 1:5 ratio, the gearbox can be smaller, lighter and lower cost. So yes, if the ratio is greater than about 1:5 you should consider multi-stage reduction for economic reasons. There is no physical ratio limit if there is no weight or cost limit.

Sheave Size & Wire Rope Strength The Crosby Group

The relative fatigue bending life for a ratio B of 16 is 2.1 (see above Table) and ratio B of 30 is 10. Relative Fatigue 10 Bending Life = 2.1 = 4.7 Therefore, we expect extension of fatigue life using a 22.5” diameter sheave to be 4.7 times greater than that of a 12” diameter sheave. Ratio A

New Treatment of Shear Wall Aspect Ratios in the 2015

The actual reduction in unit shear capacity of high aspect ratio shear walls is represented by the factor, 1.25 0.125h/b s, as noted previously. The 2b s /h factor is the more severe of the two factors and is not applied simultaneously with the 1.25-0.125h/b s factor.

Belt and Pulley Ratio Calculator CalcuNATION

The ratio in a drive system is represented in reference to the number 1. A ratio of 2 to 1 would be signified by 2:1. A ratio of 1/4 to one would be signified by .25:1. To find the total ratio, use the pulley ratio formula: Ratio = (Radius of Driven Pulley) / (Radius of Drive Pulley)

Nikon Semiconductor Lithography Systems Products archive

Resolution ≦ 38 nm: NA: 1.35: Exposure light source: ArF excimer laser (193 nm wavelength) Reduction ratio: 1:4: Maximum exposure field: 26 mm × 33 mm: Overlay

Planetary gear ratio calculations woodgears.ca

Planetary gear ratio calculations This article also available in Spanish. A question that I often get is how to work out planetary gears using the gear template generator Working out the tooth counts for planetary gears is actually not that complicated, so I initially neglected to mention how to do it.

Traction and Tractor Performance

Travel Reduction Ratio (TRR) Vt Va 1 Theoretical Velocity Actual Velocity TRR =1− = − (3) Travel reduction has traditionally been called "slip" or "% slip," but technically this is incorrect. Slip occurs between surfaces. Travel reduction is a reduction in distance traveled and/or speed that occurs because of: • Flexing of the tractive

Deep Drawing Operation (With Diagram)| Press Working

The maximum thinning is occurring at the lowest part of the vertical wall adjacent to the bottom of the cup. Drawing Ratio: An another important variable is the drawing ratio, which can be defined as determine the diameter at different stages of redraw. Assume, reduction in 1st, 2nd, and 3rd draw are 47%, 23%, and 17%, respectively

Maximum reduction ratio 200 to 1 RC Groups

Nov 27, 2017 Discussion Maximum reduction ratio 200 to 1 Electric Heli Talk

Gears, Velocity Ratios and Mechanical Advantage

What is a gear ratio? •A gear ratio is the ratio between the driver gear (the one being powered) and the driven gear (the –For maximum speed you should always have a larger reduction, while the second is a 24:40.

Comparison of Gear Efficiencies Spur, Helical, Bevel

Oct 23, 2012 Comparing efficiencies of different gear types across various reduction ratios will help us to make right gearbox selection for our applications. with maximum gear ratios up to 10:1. 7.Cycloid Gear Efficiency. These gears can work in very high efficiencies at relatively high gear ratios above 30:1 and under normal working conditions cycloid

Maximizing Diversification Flirting with Models

Dec 03, 2018 For example, if the maximum diversification ratio was 3 and the minimum was 1, a realized diversification ratio of 2.5 would correspond to a fraction of 75% of the possible range. As a testament to its robustness, the median position of the diversification ratio for the maximum diversification portfolio within the potential range was 87%.

Traction and Tractor Performance

Travel Reduction Ratio (TRR) Vt Va 1 Theoretical Velocity Actual Velocity TRR =1− = − (3) Travel reduction has traditionally been called "slip" or "% slip," but technically this is incorrect. Slip occurs between surfaces. Travel reduction is a reduction in distance traveled and/or speed that occurs because of: • Flexing of the tractive

Maximum transmission ratio of a spur gear pair Physics

Aug 05, 2013 That can reduce the weight so when multi-stage reduction is used for more than a 1:5 ratio, the gearbox can be smaller, lighter and lower cost. So yes, if the ratio is greater than about 1:5 you should consider multi-stage reduction for economic reasons. There is no physical ratio limit if there is no weight or cost limit.

New Treatment of Shear Wall Aspect Ratios in the 2015

The actual reduction in unit shear capacity of high aspect ratio shear walls is represented by the factor, 1.25 0.125h/b s, as noted previously. The 2b s /h factor is the more severe of the two factors and is not applied simultaneously with the 1.25-0.125h/b s factor.

Sheave Size & Wire Rope Strength The Crosby Group

The relative fatigue bending life for a ratio B of 16 is 2.1 (see above Table) and ratio B of 30 is 10. Relative Fatigue 10 Bending Life = 2.1 = 4.7 Therefore, we expect extension of fatigue life using a 22.5” diameter sheave to be 4.7 times greater than that of a 12” diameter sheave. Ratio A

Belt and Pulley Ratio Calculator CalcuNATION

The ratio in a drive system is represented in reference to the number 1. A ratio of 2 to 1 would be signified by 2:1. A ratio of 1/4 to one would be signified by .25:1. To find the total ratio, use the pulley ratio formula: Ratio = (Radius of Driven Pulley) / (Radius of Drive Pulley)

Gear ratios and compound gear ratios

12 factors into 4 and 3, so we could do a 1:4 and a 1:3 reduction. but let's see if we can make the two ratios closer to each other. Let's multiply both sides by 8, so our 1:12 ratio becomes 8:96. To get the reduction ratio for both gears, we want each gear ratio to be about the square root of 12, which is about 3.464. Now 8 * 3.464 is 27.7.

Hazard Ratio an overview ScienceDirect Topics

The numerical value can be a fraction of 1.0 or it can be greater than 1.0. For example, a hazard ratio of 0.70 means that the study drug provides 30% risk reduction compared to the control treatment (25). A hazard ratio of exactly 1.0 means that the study drug provides zero risk reduction, compared to the control treatment.

Vehicle Dynamics Example Problems

Its engine is running at 3000 rpm and is producing 250 ft-lb of torque. The car’s gear reduction ratio is 3.5 to 1, driveline efficiency is 90%, driveline slippage is 3.5%, and the road-wheel radius is 15 inches. What will the car’s maximum acceleration be under these conditions on a level road?

Gear Reduction in Electric Motors Groschopp Blog

Jun 01, 2015 The “reduction” or gear ratio is calculated by dividing the number of teeth on the large gear by the number of teeth on the small gear. For example, if an electric motor drives a 13-tooth pinion gear that meshes with a 65-tooth gear, a reduction of 5:1 is achieved (65 / 13 = 5).