On Sunday 24 July 2016 23:36:22 Jon Elson wrote: > On 07/24/2016 05:40 PM, Gene Heskett wrote: > > Greetings to you who are running an inverter driven spindle; > > > > I have one of those 1 HP 230 volt 3 phase motors on the table, in > > this case the one with the noisy bearings but it still rolls dead > > free. > > > > With the inverter set to 90 hertz and its running, pushing the green > > run/stop to stop it gets a rapid drop to around 75 hz, then its > > turned loose to coast for quite a spell, 10 secs maybe, at the end > > of which the DC comes on and its dead in its tracks in less than 1 > > more rev. > > Do you have a braking resistor? Does the drive give a fault when it > coasts? Sounds maybe like it is getting a DC overvoltage when > decelerating. If you do have a braking resistor, it may need to be a > lower resistance to absorb the power from the motor. > No hookup place for a braking R on this unit at all, I've had it apart down to the next step would be a hot iron. The "universal" booklet mentions it, but the terminal numbers do not exist on this 1.5 HP rated device.
> Or, as others have said, it could be a programming option is not set > right for deceleration. I believe so too. I somehow had it reverseing in around a half second, jumping a good 3/4" up in the air doing it, but then must have set something bogus and had to do a systen default reset, so now a reverse is rather leasurely again ATM. I've had it error off several times when the speed was above 60 hz too. I'll sus it out eventually but I was hoping to save some time by picking some brains on this list. One thing of note, the default hz is 400, and it never goes more than a thou or so, unable to catch up. But set it down to 160 hz and it fairly screams in short order. Coil currents at 140 hz are just below an amp, FLA at 60 hz is 3.6 amps/phase, so obviously inductance is killing available torque long before it spits copper bars out of the armature. Or fins off the internal fan. But I believe over a 2 or 2.5/1 range it will be happy, and I know it can reverse quick enough to unscrew the chuck if set right. Thanks Jon 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> ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
