Re: [Emc-users] ac servo tuning
Jon Elson wrote: Terry wrote: Hi I have been trying to tune my ac drives using the method in the intergrators manual--Increase the p till oscillate then increase I till it stops This is very interesting to me as I recently purchased a small HMC with Fanuc AC amps and motors. Where can I find pinouts and specs on Fanuc equipment? The computer only has outputs for a maximum of 4 axis and I have plans to set it up for 5. Jon, can your Pico system drive such a thing? Thanks. Ed. - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100url=/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] ac servo tuning
Hi I have been trying to tune my ac drives using the method in the intergrators manual--Increase the p till oscillate then increase I till it stops Oscillation starts at 400 P and I cant get rid of it with a 3000 I D is zero The axis will run good with 100 P 5 I 1.2 D with no following errors at 500ipm Accell is 25 min follow .002 maxfollow .05 There is a slight high pitch buzz in the motors at these settings The drives are Fanuc, motors are also There are 3 adjustment pots on the drives themselves could these adjustments on the drives be keeping me from tuning properly? I have no documentation on the drives anyone had any luck tuning Fanuc drives? Also in an unrelated question-I tried to use G64.1 exact stop mode and I get an improper code alarm The reason I tried this is a G0 x5.0 then G0y5.0 will get me a radius in the tool path instead of a square corner A fast feed move( 120 ipm) of the same locations will get a smaller radius but still not square. Thanks Terry Msg sent via CableONE.net MyMail - http://www.cableone.net - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] ac servo tuning
I meant G61 Sorry On Sun Jul 13 18:33 , Terry <[EMAIL PROTECTED]> sent: Hi I have been trying to tune my ac drives using the method in the intergrators manual--Increase the p till oscillate then increase I till it stops Oscillation starts at 400 P and I cant get rid of it with a 3000 I D is zero The axis will run good with 100 P 5 I 1.2 D with no following errors at 500ipm Accell is 25 min follow .002 maxfollow .05 There is a slight high pitch buzz in the motors at these settings The drives are Fanuc, motors are also There are 3 adjustment pots on the drives themselves could these adjustments on the drives be keeping me from tuning properly? I have no documentation on the drives anyone had any luck tuning Fanuc drives? Also in an unrelated question-I tried to use G64.1 exact stop mode and I get an improper code alarm The reason I tried this is a G0 x5.0 then G0y5.0 will get me a radius in the tool path instead of a square corner A fast feed move( 120 ipm) of the same locations will get a smaller radius but still not square. Thanks Terry Msg sent via CableONE.net MyMail - http://www.cableone.net Msg sent via CableONE.net MyMail - http://www.cableone.net - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] ac servo tuning
Terry wrote: Hi I have been trying to tune my ac drives using the method in the intergrators manual--Increase the p till oscillate then increase I till it stops This may be a typo! A general scheme might be to increase P until oscillation, then increase ** D **, not I. I don't think I will have any effect to reduce oscillation, but in some circumstances, D may help. It depends on the nature of the oscillation. Oscillation starts at 400 P and I cant get rid of it with a 3000 I D is zero The axis will run good with 100 P 5 I 1.2 D with no following errors at 500ipm Accell is 25min follow .002 maxfollow .05 There is a slight high pitch buzz in the motors at these settings The drives are Fanuc, motors are also There are 3 adjustment pots on the drives themselves could these adjustments on the drives be keeping me from tuning properly? Yes, they probably have a complete PID loop in the drive already. In this case, you may get better results with a lower P, and zero I and D, if the drive is performing a tight control of the motor. What following error are you getting in your tests? Are you using Halscope when tuning? I have no documentation on the drives anyone had any luck tuning Fanuc drives? Also in an unrelated question-I tried to use G64.1 exact stop mode and I get an improper code alarm The reason I tried this is a G0 x5.0 then G0y5.0 will get me a radius in the tool path instead of a square corner A fast feed move( 120 ipm) of the same locations will get a smaller radius but still not square. I think G64.1 requires a P word to set the following tolerance. So, you would code G61.1 P0.005 or something like that. Jon - Sponsored by: SourceForge.net Community Choice Awards: VOTE NOW! Studies have shown that voting for your favorite open source project, along with a healthy diet, reduces your potential for chronic lameness and boredom. Vote Now at http://www.sourceforge.net/community/cca08 ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
