Delta C2000 VFD Spindle Issues

[practical]

Hopefully someone can help. We are having an issue with our Delta C2000 VFD and spindle motor. All basic motor parameters and PGO1L encoder card parameters have been set. Issue is with using the parameter 00-11 set to number 3 IMFOCPG control. We cannot get the drive to increase spindle rpm past 749rpm according to the VFD drive faceplate rpms and Centroid CNC CNC12 control screen spindle rpms. We have set the encoder type and pulse line count in centroid parameters and we have made sure the encoder is reading in correct direction. We have set the maximum spindle speed in the control. We have set the encoder axis number correctly. All parameters from centroid manual have been set for use with encoder on spindle. Now we are trying to tune the VFD and control to read correct rpms. We can control the spindle motor either with the delta c2000 digital key pad or the Centroid control and neither will let the drive go past 748rpm. I can see we have analog voltage from 0- +/-10v and giving it a max spindle command of 3000rpm the analog voltage is 10v so I know that works. If I change parameter 00-11 to 0 which is open control I can make spindle go to any rpm in the range we have for max output Frequency which in this case is set to allow max rpm of 3000rpm. But now I cannot orient the machine spindle because I’m not using the FOCPG control. Any ideas on what could be causing this?

[tblough]

Centroid operates the spindle in open-loop mode. It does not use the encoder to control the spindle speed. It uses the encoder only to synchronize movement with the Z-axis during rigid tapping.

You will need to adjust the maximum Hertz setting in the VFD to correspond to the maximum speed you have set in CNC12. If you set the max speed in CNC12, it will output 10V when S3000 is requested. Your VFD needs to be set so 10V on the analog input results in 3000 rpm on the motor.

[practical]

Yes that is correct about Centroid not controlling spindle speed with encoder that is why we have the VFD, Centroid uses analog voltage. The VFD with encoder card should control the spindle speed from the analog signal from the control. I'm sorry I forgot to mention that increasing the maximum output frequency does not change the spindle going above 748 rpms in the previous post. But as stated in the post if we change to open control on the VFD we can then increase the spindle to higher rpm and it matches whats on the centroid screen and also the digital keypad on the VFD. But we cannot use the orientation function because of open control mode on the VFD. So is this something that needs programmed in the PLC, or maybe a defective VFD? It seems that the VFD in FOCPG control mode which is the mode we need for spindle orientation does not allow correct output frequency. Spindle does orient in the FOCPG mode and will change tools. I have an email out to Delta tech support just wondering if someone here had same issues while setting up a delta drive.

[practical]

All who were wondering problem has been figured out.

[cncsnw]

What did you do to fix it?

[TBcnc]

I have the same problem, how did you do to fix it ?