Oh look, same thing but larger: http://www.ebay.com/itm/1-Trapezium-500W-100ohm-Aluminum-Housed-Wire-Wound-Braking-Resistor-/281080278842?hash=item4171b0af3a:g:VqMAAMXQ855RwVCg
From what I'd Googled, the wattage can be much lower with drives for spindles that just need them to stop on a low duty (<1/min). Danny On 3/13/2016 10:45 AM, John Thornton wrote: > I don't know who AT is or what your looking at, the braking resistor for > the 3hp GS2 is $76 all day long. > > Look by the output terminals... > > The AD 100 ohm 300 watt braking resistor is $65 part number GS-22P0-BR > > http://www.automationdirect.com/adc/Shopping/Catalog/Drives/AC_Drive_%28VFD%29_Spare_Parts_-a-_Accessories/GS_Braking_Options_%28Braking_Units_-a-_Resistors%29/Braking_Options_%28All_GS_Drives%29/GS-22P0-BR > > JT > > On 3/13/2016 10:36 AM, Gene Heskett wrote: >> 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 > > ------------------------------------------------------------------------------ > 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 > ------------------------------------------------------------------------------ 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
