calculate RPM from VFD

[Peter Nachtwey]

This drive is stupid and requires an upgrade.

An upgrade to a vector drive with RPM information would cost less than the time spent on the 272 view and 14 comments are worth. Now prove me wrong. I just had to say that.
http://www.plctalk.net/qanda/showthread.php?t=43709

 

[allscott]

An upgrade to a vector drive with RPM information would cost less than the time spent on the 272 view and 14 comments are worth. Now prove me wrong. I just had to say that.
http://www.plctalk.net/qanda/showthread.php?t=43709

Thanks for my first laugh of the day, and yes your right.

 

[tomwhite007_2008]

Hello Steve B

So the information above, would it be the total gear ratio for the Drive Sprocket(22/100) and Gear Box(1/30)? 22/100 + 1/30

Thanks

 

[drawson]

Hello Steve B

So the information above, would it be the total gear ratio for the Drive Sprocket(22/100) and Gear Box(1/30)? 22/100 + 1/30

Thanks

Nope.

(22/100)*(1/30)

 

[tomwhite007_2008]

can anyone verify drawson's answer?

(22/100)*(1/30)

 

[Steve Bailey]

You should be able to do it yourself. Motor Speed * 22/100 = Gearbox Input Speed. Gearbox Input Speed * 1/30 = Gearbox Output Speed.

Plug some numbers into those two equations and calculate the Gearbox Output Speed.

Now you also know that Motor Speed * Total Ratio = Gearbox Output Speed. You've already calculated Gearbox Output Speed, so you know what Total Ratio needs be to get the same answer using that equation. Do you have to add the two ratios or multiply them to arrive at the same result?