Spindle at speed

Good evening,Well, it's been a ride since 2018 when I started this project. Since then, I have taken the Warco lathe, added a 1HP 2840RPM motor. Done away with the dovetail bed and made linear rails. Gang tooling and a 385KG epoxy granite frame and enclosure. This forum has been a fountain of information. One last stumbling block though, waiting for the spindle to reach commanded speed before cutting, and commanded speed different to actual (measured with RPM meter which agrees with the Axis RPM counter). So, first problem. I ask for M4 S1000, the actual speed is 1040RPM. Not too bad. I ask for 1350, I get 1575. I ask for 1500 I get 1726, I ask for 2000 I get over 2250RPM, the higher I go the more out it is. I am using a Bosch EFC3610 VFD getting 0-10V. I have set up the VFD using the plate on the motor. It uses 50Hz, 2840RPM max at 10V. Using a potentiometer on the front of VFD the motor spins at what is requested. I have a feeling my HAL is out somewhere. I am using an index and phase A on my spindle with a 60 slot plate attached to the spindle.  I read I can make it a closed loop spindle???? No idea how. The second issue is waiting for the spindle to come to speed. My VFD is set to get to the required RPM in 4 seconds, thus not putting a huge strain on the motor. Again, I think my HAL is wrong. Reading pages and pages on Google and here, I am even more confused. I have attached my HAL file and my post HAL file. Any help much appreciated. 

For spindel-at-speed setup you might want to add something like this to your hal:
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See section 6.2 :http://linuxcnc.org/docs/html/examples/spindle.html

I'm not really familiar with the PWM settings, but have you tried to adjust 'pwmgen.0.scale'?

Hi, I will add that in the morning and see if it works. I have not adjusted the pwmgen.0.scale as what I read this is the maximum speed of the motor. But, again, I will try in the morning and see if it works.