Parameter defining Encoder Position Accuracy

[Ramu]

Hi


I am facing some problems regarding positioning of spindle ( After M19 command ).

I know that it is truely based on Spindle Encoder Parameter setting.

Can anyone let me know that which is the parameter which defines spindle Encoder orientation accuracy & how to restore it ?

Thanks.

[Al_The_Man]

What make control?
What Model?
Al.

[Ramu]

Sry for late reply

Machine - Pinnacle
Control - Mitsubhishi

[Al_The_Man]

There are many models of Mitsubishi CNC? it sound like you want the grid shift for the spindle encoder?
Al.

[Ramu]

No, i know the parameter to change the orientation position. Usually it would be is M19 P30 where P30 defines the offset distance from the zero position.



What i am looking out for a parameter which measures/traces actual rotation of spindle v/s commanded position.

I have a doubt that my spindle is overshooting sometimes & that's why i want to measure/know actual rotation of spindle to revalidate my doubt of overshooting.

For Instance, when i command 90 degree offset from 1st position, i suspect that it is not traveling a motion of 90 degrees & overshoots by some amount.

I understand that a machine control is built up with some PLC logic. The servo motor at its receiving end must be receiving a signal of actual rotation of spindle & accordingly it must be completing the circuit.

Any guess of the parameter tracing the actual rotation of spindle ?

Thanks
Varma

Comments welcomed.

[kel1]

I think what Al is trying to tell you is that you need the control model because the parameter may be different depending on the model of the control.