Originally Posted by
justinwol
I feel bad after you've been willing to engage me all this time, but you are probably not going to like me after this.
You did and is what triggered the whole conversation because I decided to heed your warning and make sure I understood and set things up properly. It was good to do so because it pushed me to understand the VFD far more thoroughly than I probably otherwise would've. Here is your quote:
You seem to think that the VFD will have an operating frequency of 400 Hz while running at 6000 RPM. This is wrong, it will have an operating frequency of 100 Hz. The error you make in this statement is that the rated frequency and the operating frequency are not the same. Yes, if the spindle tries to run with a "rated frequency" less than its rating it will be damaged - your gas pedal analogy. The rated frequency (PD004) needs to be set properly and for this spindle should be set to 400 Hz (which is NOT changed on a power breakdown), this is a "set and forget" parameter. The operating frequency is variable during operation and limited in range by PD005 (max) and PD011 (min) - this is how the speed of the spindle is controlled and what you don't seem to understand. You cannot set PD003 = 400 and expect it to stay at 400 (PD001 = 0 and PD002 = 0 or keypad only mode). PD003 will change with changes made to the speed of the spindle - that is what this parameter is, the "operating frequency" not the "rated frequency". As I've stated before in this thread, even if PD003 is set below PD011, PD011 will override PD003's setting to ensure no "false operation" of the spindle occurs. I've attached the relevant portion of the manual to this post. Though I don't think it will matter to you, your experience seems to have closed your mind.
You are saying that running the spindle at 120 Hz will damage the spindle - literally, you explicitly say this above. No it will not. It does not matter what speed the spindle starts at if the speed is within the operating frequency range of the spindle, in my case 100 Hz (6000 RPM) to 400 Hz (24000 RPM) and PD004 is properly set to 400 Hz (the rated frequency). The VFD changes the speed of the spindle by changing the operating frequency and in some modes PD003 is used to set initial speed on RUN or store changes made to it, thus controlling the speed of the spindle. You don't seem to understand that the spindle will also start at 120 Hz in PD002 = 1 (when PD003 is bypassed), if the potentiometer on the VFD is set to 120 Hz, so long as 120 Hz is above PD073 (min analog operating frequency). "Set to" literally just means turning the knob on the front of the VFD. Internally this supplies a voltage from 0-5V (PD070 = 1) which is interpreted through the operating frequency range limiting parameters, PD072 and PD073, setting the current operating frequency. This is perfectly fine and normal operation.
When I ask you how the VFD changes the spindle speed, you don't answer. You just keep stating the same thing with no supporting arguments and an underline does not make the statement more meaningful - arguments supporting it do:
Thanks for your help, I'm sure you know a lot about these things, but your information on PD003 and the operating frequency for the HY02D223B is not good. You seem to be setting PD003 (operating frequency) to the max rated frequency as a "best practice" then changing to modes that change the operating frequency anyways. I think what is confusing you is that in this case PD003 will stay at 400 Hz because it is bypassed and not changed/used in other modes like PD002 = 1. However, you seem to think this is doing something important, it is doing nothing.
This is clearly the end of the conversation, I will not participate anymore,
Good bye.