There should be a gain parameter you can set. What kind of hardware do you use to generate the analog voltage?
Regards, Alex ----- Original Message ----- From: "Arnold Riter CNC" <[email protected]> To: "Enhanced Machine Controller (EMC)" <[email protected]> Sent: Tuesday, December 23, 2008 12:43 AM Subject: Re: [Emc-users] servo reverse I tried with a negative value for the scale. That is Ok, since I can read the encoder correctly now, but it's needed to reverse the analog signal for the servo speed control. I solved it temporary by modifying the drive internal parameters, but I don't like to modify it, because I will use the drive for two project. Coud you tell me how to change the analog signal (+10 -10) to (-10 to +10) ? since a negative scale needs to invert the analog signal I think. Regards Arnold Stephen Wille Padnos escribió: > Stuart Stevenson wrote: > > >> On Sun, Dec 21, 2008 at 4:04 PM, Arnold Riter CNC >> <[email protected]> wrote: >> >> >> >>> Hello to everybody, >>> >>> I'd like to thanks you all for the information which make me able to >>> carry out the conversion of a BF20 mill to CNC. >>> I've been using cnc for a while with windows based program, and emc2. >>> When I decided to use servos in my last project , it was clear for me >>> that the option of EMC2 will be the best, and already tested the machine >>> I can said that I am very pleased with EMC2+Linux >>> >>> I've used brushless servo + 5i20 mesa card + 7i33 + 7i37 >>> I'm very happy with the mesa cards, I can read the encoders with no >>> problems at all from the first time, and all the system are very very >>> fast and reliable. >>> >>> I'm finishing the work and I need your help, so the question is: >>> >>> I need to reverse the way of one servo turn, but I wouldn't like to >>> modify the wiring, so, is it possible to change any software part like >>> the hal file? If possible could you give me a clue how to do that? >>> >>> >>> >> you should be able to reverse the sign of the scale in the .ini file and >> then reverse the connections (in .hal file) for the encoder >> >> >> > The encoder should be connected to a Mesa encoder input, so reversing > the signals isn't possible in a .hal file. > > You can certainly change the sign of the encoder scale though :) > > - Steve > > > ------------------------------------------------------------------------------ > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > > ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users -------------------------------------------------------------------------------- Internal Virus Database is out of date. Checked by AVG - http://www.avg.com Version: 8.0.176 / Virus Database: 270.9.18/1849 - Release Date: 15.12.2008 09:01 ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
