Greetings all; I have found 5 of the signals on this strange bob, the only 5 in this simple config. So I have faith I can find the others as I need them.
To say that this board is scrambled is a bit of an understatement. This vfd's little booklet I have does show a potential rs232 port, but the socket is not to be found. So I am stuck running it with a pwmgen pulsing the 5 volt analog in (pin 3) at a high enough rate it integrates to analog in its noise filters. The vendor has assured me that works fine. I am however, wondering if the pwmgen has more than one default mode, as this vfd needs 2 separate run-fwd (pin 8) and run-reverse (pin 9) input lines in addition to the analog 0-5 volt speed command. If it had a mode where it grabbed pins 15 and 17 for those two run signals, it would save some hal trickery. Is there such a mode? It does have a 5V Fout (pin 6) but does not say if its a pulse frequency at motor drive, or an integrated analog voltage. In either event, I do not believe its 5i25 compatible, but might be able to drive a separate dual slope integrating voltmeter if it was range calibrateable to show freq or rpms. That would give the operator, me, feedback on when it was time to change belts or backgears. Sitting on the table, running free, I'd say mininum drive hz in any 5 minute period should not be less than 30 hz as the vfd can throttle the current, but it throttles it at about what a 1.5 horse motor would draw at rated speed at full load, IOW its warming up the coils of a 1 horse rated motor. With fresh bearings in it, I have run it up to 200Hz, (4 pole motors, so thats about 6 grand & I worry about the fins on the fan) but I doubt it has usable torque as the current draw is well under an amp/phase then. Same effect on power that the inductance of a stepper causes. I'll no doubt find out when I do load it up. It would be nice if a firmware for it could be cobbled up as 4 axis + 1 encoder & one pwmgen on P3, and a menu of serial ports on P2. That would make a one size fits a lot more board for sure. I'd like to be able to talk to it and get usable data from someplace besides the encoder. Thanks everybody. Cheers, Gene Heskett -- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
