On Sunday 13 March 2016 10:14:26 John Thornton wrote: > I'm confused the braking resistor for my drive is $76... > > JT
AT's quoted prices on their web page, a/o this morning, were uniformly all $435 with a note they also needed some sort of a controller interface too, price UNK on that. Looking in the small booklet for this FVD, an ASKPOWER A131, they don't offer a lot of data, but do say a 1.5 kw should use a 100 ohm resistor that can stand 250 watts for the short duty cycle situation. But the bigger concern is that the braking rsistor terminals P & B, are not to be found on the customer interface, nor on the top, logic board in the device. Possibly on the power output board, but I haven't dissed it far enough to see that if that is where they are. Can anyone else advise me on this, or do I have a vfd that cannot do this? > On 3/13/2016 8:47 AM, Gene Heskett wrote: > > On Sunday 13 March 2016 09:30:30 John Thornton wrote: > >> I just used the the one for by the drive. I "think" not all drives > >> would use the same resistor. Just looking at the GS2 and there are > >> 12 different braking resistors. > > > > All of which are $435 a copy & still need some sort of an extra, > > external controller. AD thinks we are growing our own money on a > > tree in the back yard? > > > > I'll look at the controller I have first. I should be able to do it > > for under a $100 Ben Franklin picture. > > > >> http://www.automationdirect.com/adc/Shopping/Catalog/Drives/GS2_%28 > >>115 > >> _-z-_230_-z-_460_-z-_575_VAC_V-z-Hz_Control%29/GS2_Drive_Units_%281 > >>15_- z-_230_-z-_460_-z-_575_VAC%29/GS2-23P0 > >> > >> http://www.automationdirect.com/adc/Shopping/Catalog/Drives/AC_Driv > >>e_( > >> VFD)_Spare_Parts_-a-_Accessories/GS_Braking_Options_(Braking_Units_ > >>-a-_ Resistors)/Braking_Options_(All_GS_Drives)/GS-23P0-BR > >> > >> JT > >> > >> On 3/13/2016 8:03 AM, Gene Heskett wrote: > >>> On Sunday 13 March 2016 07:40:25 John Thornton wrote: > >>>> On my GS-2 with the braking resistor I go from 1800 fwd to 1800 > >>>> rev in 1 second. I have both acceleration and deceleration set to > >>>> 1/2 second. > >>>> > >>>> JT > >>> > >>> That would be considerably more usefull than the controllers > >>> default of 30 seconds. Do you recall the specs of the resistor > >>> you used? > >>> > >>> Thanks John. > >>> > >>>> On 3/12/2016 10:12 PM, Gene Heskett wrote: > >>>>> Greetings everybody; > >>>>> > >>>>> Given that I note the vfd's seem to have an adjustable > >>>>> accelleration control, and that my couple of hours playing with > >>>>> it from its own front panel, I am led at ask the question of > >>>>> just how fast can one of these things be reversed from say 1000 > >>>>> rpm at the motor spindle? > >>>>> > >>>>> I ask because my present setup, using the OEM PM DC motor which > >>>>> is all gear drive to the spindle, one of Jons pwm servo > >>>>> amplifiers and a 125 volt dc supply, reversals at the turn > >>>>> around depth of this cycle of a peck tapping operation, with the > >>>>> spindle doing 300 rpms, is a very small fraction of a second, > >>>>> far less than 30 degrees of rotation. Based on its reversal > >>>>> performance at 2500 rpms being a slim second, I am concerned > >>>>> that the vfd may not be able to reverse so quickly, and will > >>>>> impact my use of G33.1 because of the turnaround over shoots. > >>>>> On my lathe, with its fragile drive train and a 5" chuck, this > >>>>> overshoot is between 2 and 3 turns at 250 running rpms. Usable, > >>>>> but if I don't stop it soon enough, the tap may bottom out and > >>>>> break. > >>>>> > >>>>> What has been the experience of others using smaller vfd's and > >>>>> motors? > >>>>> > >>>>> Can you still do rigid tapping safely? > >>>>> > >>>>> Thanks all. > >>>>> > >>>>> Cheers, Gene Heskett > >>>> > >>>> ----------------------------------------------------------------- > >>>>-- --- -------- Transform Data into Opportunity. > >>>> Accelerate data analysis in your applications with > >>>> Intel Data Analytics Acceleration Library. > >>>> Click to learn more. > >>>> http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 > >>>> _______________________________________________ > >>>> Emc-users mailing list > >>>> Emc-users@lists.sourceforge.net > >>>> https://lists.sourceforge.net/lists/listinfo/emc-users > >>> > >>> Cheers, Gene Heskett > >> > >> ------------------------------------------------------------------- > >>--- -------- Transform Data into Opportunity. > >> Accelerate data analysis in your applications with > >> Intel Data Analytics Acceleration Library. > >> Click to learn more. > >> http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 > >> _______________________________________________ > >> Emc-users mailing list > >> Emc-users@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > Cheers, Gene Heskett > > ---------------------------------------------------------------------- >-------- Transform Data into Opportunity. > Accelerate data analysis in your applications with > Intel Data Analytics Acceleration Library. > Click to learn more. > http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users 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> ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785111&iu=/4140 _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
