Need help with a sensorless vector VFD and 2.2kw motor.

[kajuk]

I managed to solve the issue with the V/F mode. There is are PD.00-05 settings in the VFD which are not mentioned in the original manual but described in a manual for a similar VFD (CHE100): http://platforma.astor.com.pl/files/getfile/id/4040
Setting PD.03 (Amplitude restraining oscillation) from the default 5000 to 0 lets the drive to go all the way down to 0Hz without tripping. Of course there is little torque left when rpms are below 6000.
Still no luck with vector mode.

[EddyCurrent]

This was the report for my problem, but it may be no use to you unfortunately.

http://www.mycncuk.com/forums/gantry...html#post54303

[EddyCurrent]

Did you read section 5.2.4 of the manual ?

It's strange how the trimpot works in v/f but does not seem to work in vector mode.
Also the motor speed is an issue. It appears that spindle motors are rated at the theoretical speed of 24000 rpm but this is not the actual speed, a thing called 'slip' has to be taken into account.
The manufacturers of my spindle say the slip is about 4% of full speed which works out at 23040 rpm (they said they used a figure of 23100) so this is the speed you should enter for parameter PB.04

[kajuk]

Did you read section 5.2.4 of the manual ?

Yes, this is what I follow when doing autotuning.

It's strange how the trimpot works in v/f but does not seem to work in vector mode.

The inverter kinda responds to the trimpot and increases/decreases frequency but the spindle doesn't follow it. Even if I set minimal allowed frequency to 400, the spindle doesn't want to know and still jerks around a few rpms.

Also the motor speed is an issue. It appears that spindle motors are rated at the theoretical speed of 24000 rpm but this is not the actual speed, a thing called 'slip' has to be taken into account.
The manufacturers of my spindle say the slip is about 4% of full speed which works out at 23040 rpm (they said they used a figure of 23100) so this is the speed you should enter for parameter PB.04

Do you think such a small difference may have an effect? Even when I tried your suggested settings (1.1kw/200Hz/12000rpm/110V/9.5A) it didn't make a much difference. I'll try anyway.

[EddyCurrent]

Did you try the static autotune ? PB.00 = 2

Also you should set P0.15 to 0.0 (Lower frequency limit)

[kajuk]

Did you try the static autotune ? PB.00 = 2

Yes, I did. doesn't help.

Also you should set P0.15 to 0.0 (Lower frequency limit)

It is set to 0.

[EddyCurrent]

Anything here ?

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[kajuk]

No:(
Seems like I'm the only owner of this inverter beyond China:)

[EddyCurrent]

Well it was the same with me with the ABB drive, they had no experience of using it with a high speed spindle, the difference was they were able to send an engineer at no cost to myself and he sorted it out in a morning.

[EddyCurrent]

How are you putting the drive into RUN P0.02 ?
Make a note of the setting for P0.06 then change it to 15Khz
Make sure PB.01 is set to 0 (E mode)
Are the PA group values set to default ?

If this is still no good put P0.06 back to what it was.