This applies to the Huanyang VFD with a 24,000 rpm spindle motor.
If you spindle motor is rated to spin at up to 24,000 rpm then look in your VFD Manual for PD144 settings. It should be listed as “Rated Motor Revolutions” and most likely shows the default setting is 1440. If so then change the setting for PD144 to 3000. That will enable your spindle rpm to max out at 24,000 rpm. With the default setting of 1440 your spindle is only running at around12,000 rpm when maxed out.
To get the RPM to show up on the display Click the >> button on the front of the VFD to cycle through the settings. You want to select the Setting where the “ROTT” light is on to show RPM’s. See the image below.
You can change the rate that the motor winds up and winds down when powered on and off by changing the PD settings for PD014 & PD015. The value you set these to is number of seconds to either wind up to selected rpm (PD014) or wind down to zero rpm (PD015).
PD014 set to 8 will enable the spindle to reach the set rpm in 8 seconds.
PD015 set to 10 will enable the spindle motor to come to a complete stop in 10 seconds.
I do not recommend using a value of less than 8 (seconds) for either of the two settings because the VFD sends increased current to the motor to cause it to speed up and slow down in less time. If you get too aggressive then you can overheat the motor and or the VFD. Some models have an optional Braking Resistor and Heat Sync to allow for much faster start and stop times.