Sebastian,
Yes my motor is rated for 24000 RPM. My manual says:
"PD144 Factory Setting 1440. This is set according to the actual
revolution of the motor. The displayed value is the same as this set
value. It can be used as a monitoring parameter. Which is convenient
to the user. This set value corresponds to the revolution at 50Hz."
There's nowt I can see about dividing by 10 and the key bit seems to be
the 'at 50Hz' part.
At 400Hz (my max) PD144*fmax/50Hz = 3000*400/50 = 24000 RPM.
I guess I misunderstood the manual initially (easy to do as it's in
Chinglish... but infinitely better than my Mandarin) and set PD144 to
2400 conveniently deluding myself about the lack of a fifth digit.
I have double checked and now using your hy_vfd with -S 24000, a
commanded N RPM shows N RPM on the display and on the pins and on my
tachometer. I don't recall ever checking the actual RPM vs indicated
for the old hy_vfd driver and reverting to it now the spindle is
travelling 25% faster than commanded and indicated (no I still don't
quite understand that bit but hey ho).
So your hy_vfd driver is doing the right thing. I'm not so convinced
that your man page for PD144 is helpful though (at least for my version
of this VFD).
How about something like:
PD144 Set register PD144 (rated motor revolution) to (50*motor max speed
in rpm)/PD005.
PS - Sorry for reflecting the whole digest back to the list just now. I
hit s not f :-( If the mailing list software was clever enough to detect
such idiocy then I never typed this postscript :-)
--
Regards,
Russell
--------------------------------------------------------------------
| Russell Brown | MAIL: [email protected] PHONE: 01780 471800 |
| Lady Lodge Systems | WWW Work: http://www.lls.com |
| Peterborough, England | WWW Play: http://www.ruffle.me.uk |
--------------------------------------------------------------------
------------------------------------------------------------------------------
_______________________________________________
Emc-developers mailing list
[email protected]
https://lists.sourceforge.net/lists/listinfo/emc-developers
