Re: [CAD_CAM_EDM_DRO] Re: Servo motor selection

At 10:45 PM 9/5/01 -0000, Mariss wrote:

>start with its output power. Take the 60 oz-in @ 2600 RPM. Multiply
>both togeter and divide the result by 1351. The answer is 115.5 Watts
>of mechanical power.

>OK, what can 115 Watts do? Well, 1 Watt is 531 inch-lbs per minute.
>So 115 Watts is 61,311 inch-lbs per minute. If you need to move at
>say 300 IPM, then you will get 61,311/300 or 204 lbs of force (or

Mariss, going from oz-in*rpm to watts to in/min*lb! You make my head spin!

Torque times speed is a constant. For rotary motion, take rpm times 2*pi
to make it dimensionless/minute. One pound is 16 ounces.

So, 60 oz-in @ 2600 rpm is 60/16*2600*2*pi = 61261 in-lb/min

@300 ipm you get 61261/300 = 204.2 lb force

There's no need for silly metric conversion factors at all!! :-) :-)

Best regards,

Randy

Randy Gordon-Gilmore ,----.___________ ______________ _________________
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