MarkNovack

My Feedback: (3)

Hi,
Could somebody provide the correct figures, or is there a good listing on the web, of the correct conversions from inch/ounce of torque to newton/meters or whatever the poplular metric measurement is.

I used an online conversion calculator but could not seem to get numbers that agree with the European spec sheets and USA spec sheets. It has left me slightly confused in regards to the numbers posted by the manufacturers on their servo packages.

Thank you,
Mark

Phil Cole

I usually see servo torque specified in in.oz or kg.cm.

The conversions from oz to kg and in to cm are well known.

If you get discrepancies it would be the fault of the distributors, either through incorrect calculations or different measurement techniques or standards. For instance, I never see the seervo position error quoted for the specified torque values. Some servos need at least five or ten degrees before they develop their specified torque, while others only need a degree or two.

1 in = 2.54 cm
1 oz = 0.0283 kg
1 cm = 0.394 in
1 kg = 35.2 oz.

So 1 kg.cm = 1 x 35.2 oz/kg x 0.39 in/cm = 13.7 oz.in.

I could go on about using a unit of mass (kg) when it's force that's being measured. You just have to trust that they measured the servo on a kg scale calibrated for gravity at the Earth's surface.

MarkNovack

My Feedback: (3)

Thank you. Very good job of explaining the math.

Mark

kris1

Guys

Check out this link

http://www.flyingsites.co.uk/downloads/index.htm

and try the conversion program.

Cheers

Kris