velocity Setpoint vs Speed[RPM]

Hi to All,

I am using Cu310-Dp and CPU 3152-DP In My Project. For feeding the Sheet to the press we used the Servo. In order to calculate the Actual Length We used the External encoder [5000 ppr ], the Encoder Connected Directly To X23 Port of Control unit.

I Entered the Following Setting in Mechanics

LU per Load Revolution: 39800

Load Revolution: 1

Motor Revolution: 14

I Used the SIEMENS telegram 111, PZD-12/12

I Sent the Velocity Set point [P2643] is1200 [1000LU/Min] , Now I wants to Know exact speed [RPM] of Given Velocity Set Point.

Kindly Help Me

Vijay Vee

Your speedsetpoint = 1200000LU/min.

LU per Load Revolution: 39800 ==> load speed = 1200000LU/min/39800 = 30,15rpm

Motorspeed = Loadspeed * gearratio ==> 30,15 * 14 = 422,11 rpm

But you will get the actual motorspeed in r63 in telegram 111.

 

Dear Zaho,

Thanks for your reply.Now i understood the Velocity setpoint concept clearly . But now i have one issue,my motor speed not increased more than 670 Rpm. 

Example

If i gave speedsetpoint = 1200000LU/min. My motot runs in 670 RPM

ALSO

IF i gave Speed Setpoint= 5000000LU/Min .Also My Motor Runs In 670 RPM Only

I thing Some Factors limited My Velocity. Also I Checked My Maximum Velocity In Limits that is 300000 1000lu/MIN

Here With I attached my Starter Backup Kindly Any One Help Me......