Can you post using a new topic , he had 828D with Jog enable, you have 810D with spindle RPM issue. Please don't follow like that! Please !

Parbhakar Yadav

One of our system in 810D cnc controller, it's a basically cylendrical grinder whose spindle speed is controlled by a VFD from DELTA ME300, and there is a provision to change the wheel RPM by programme but by changing rpm via program spindle speed remain constant, is there is any way to change that RPM from programme??

There is one analog module available I  PLC to control the frequency of VFD (0-10V signal ) 

But it seems to be not working. Any solution for that??

 The best answer to your question is from your machine builder. Here I can try to give you some tips:

#1--You should know if your machine spindle is bonded with any other axis? That means they running in a synchronized mode-- if yes , then you cannot change spindle speed as you like, there should be some rules. (such as a Gaer grinding machine, spindle speed has a relation with parts clamper Axis--C and other infeed axes)

#2--you should know if your spindle drive (VFD) setpoint /speed reference is coming from 810D or it is coming from some other source --such as some OEM device 

#3--As I know if the normal spindle  in Turning or Milling machines, you can use NC program 

to change speed easily by S code, such as M4 S1500, change to M4 S2000

#4--If your spindle not controlled by 810D, you can try to change its speed by adjusting the setpoint of its VFD

as your  REF above ideas

Parbhakar Yadav

Actually we are using VFD to change the spindle RPM for Thread Grinding Machine, Earlier it was used on fixed speed, but now there is requirement to change the speed but this is not going to happen. As it was equipped with required hardware (Analog Module Available)  but it doesn't work,

To change frequency analog module always supplies 4V signal for every RPM.  

Parbhakar Yadav

Actually we are using VFD to change the spindle RPM for Thread Grinding Machine, Earlier it was used on fixed speed, but now there is requirement to change the speed but this is not going to happen. As it was equipped with required hardware (Analog Module Available)  but it doesn't work,

To change frequency analog module always supplies 4V signal for every RPM.  

Hello,

Which is CCU? Which is analog module? Do you get varable analog output voltage? Have you checked VFD variable setpoint? Does it varies as per spindle RPM command? Can you vary VFD speed from its Operator panel?

Please provide detail information. i.e. if PLC analog output i.e. VFD input setpoint is varing but spindle speed doessnot vary then check VFD parameters or if PLC analog out put is not varing then you need to chcek PLC analog module as well as PLC logic.

HTH