That is pretty slick. I thought you were trying to drive a PWM input on the drive, not an analog input.
I think you should definitely put that on the wiki someplace. On 10/1/2011 12:57 AM, Kirk Wallace wrote: > Thanks for all of the replies. I think I solved it by tying the input to > the control common with a resistor and capacitor as shown in the > attached file. I guessed with a 10uF electrolytic and adjusted the > resistor, about 700 Ohms, to get 100% RPM at close to 100% duty. It > works very well, so far. I get very fine resolution with at most +-1% > noise indicated on the VFD display and less than 5% accuracy across the > usable range. I tried a configuration with just the resistor, but it > just lowered the max RPM, the capacitor seems to make the difference. > > I hope to get a spindle encoder installed some time, which could be used > for feedback, but it is certainly good enough for making parts now. The > encoder is going to be a bugger. my machine is very similar to Jon's > Bridgeport, and I am very reluctant to cut into any of the nice paint on > this machine, so it needs to be a bolt-on somehow. > > Now, on to the next problem (and maybe post the results to the wiki?). > > > > > ------------------------------------------------------------------------------ > All of the data generated in your IT infrastructure is seriously valuable. > Why? It contains a definitive record of application performance, security > threats, fraudulent activity, and more. Splunk takes this data and makes > sense of it. IT sense. And common sense. > http://p.sf.net/sfu/splunk-d2dcopy2 > > > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > ------------------------------------------------------------------------------ All of the data generated in your IT infrastructure is seriously valuable. Why? It contains a definitive record of application performance, security threats, fraudulent activity, and more. Splunk takes this data and makes sense of it. IT sense. And common sense. http://p.sf.net/sfu/splunk-d2dcopy2 _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
