New machine Stuart. It is a custom machine that processes structural beams. the machine is 30m long with 5 axis and many pneumatic controls. The x axis is the material that is moved and not the machine.
On 2013/05/06 11:30 PM, Stuart Stevenson wrote: > Is this machine a new machine? > If it is a retrofit; > What control did it have? > Why did they replace the control? > On May 6, 2013 3:01 PM, "Marius Liebenberg" <[email protected]> wrote: > >> Peter, >> I can surely try that although it might be very difficult due to the >> high gearing. >> My first reaction was that it was mechanical but then came the argument >> of "only in one direction" and very predictable and repeatable. I am >> waiting for my customer to make contact to arrange for me to go to the >> machine and spend a day there to try and get to the bottom of this. I am >> going to look very closely at the mechanics first. >> >> On 2013/05/06 05:14 PM, Peter C. Wallace wrote: >>> On Mon, 6 May 2013, Marius Liebenberg wrote: >>> >>>> Date: Mon, 06 May 2013 07:14:34 +0200 >>>> From: Marius Liebenberg <[email protected]> >>>> Reply-To: "Enhanced Machine Controller (EMC)" >>>> <[email protected]> >>>> To: "Enhanced Machine Controller (EMC)" >>>> <[email protected]> >>>> Subject: Re: [Emc-users] Creep in X axis >>>> >>>> >>>>> Are the drives AC servos so the encoder signals are in fact coming >>>>> from the drives, not the encoder? >>>>> >>>> There is an encoder on the motor that is connected to the drive. The >>>> feedback is then given by the drive. >>>> >>>>> If this is the case, is it possible tha the X axis drive is either >>>>> faulty or improperly setup as regards encoder outputs? >>>> I have swapped out the drive with one of the working axis. I also >>>> swapped out the 7i33. There are two in the system and I swapped them >>>> over. The error stayed with the x axis. >>>> >>>> >>>>> Are you using differential signaling from the drive/encoder to the >>>>> 7I33? >>>> Yes >>>> >>>>> If so, is the 7I33 setup for differential inputs >>>>> >>>> Yes >>>> >>>>> is the error affected by velocity? (same error if you move at 1/2 the >>>>> speed?) that is, is it possible you are running into a count rate >>>>> limitation somewhere? >>>>> >>>> There is a huge downward gearing on the x axis and we move very slowly >>>> as the workpiece can be very heavy. It could be a problem that I will >>>> have to check out. Why in one direction though? >>>> >>>> >>>>> what is the encoder/drive simulated encoder resolution (counts per MM) >>>>> and maximum X velocity? >>>>> >>>> I am guessing here a bit as I am nit close to the machine at this time. >>>> The encoder scale is 3500 and max velocity is around 20000 mm/min >>>> >>> Hmm.. this is beginning to look more like a mechanical problem >>> >>> Can you mark the motor shaft and check the marks relative position to >>> the motor case before and after a long move? >>> >>> >>> >>>> -- >>>> Regards / Groete >>>> >>>> Marius D. Liebenberg >>>> MasterCut cc >>>> Cel: +27 82 698 3251 >>>> Tel: +27 12 743 6064 >>>> Fax: +27 86 551 8029 >>>> Skype: marius_d.liebenberg >>>> Skype Me^(TM)! <skype:marius_d.liebenberg?call> >>>> Get Skype <http://www.skype.com/go/download> and call me for free. >>>> >>>> >>>> >>>> >>>> --- >>>> avast! Antivirus: Outbound message clean. >>>> Virus Database (VPS): 130505-1, 2013/05/05 >>>> Tested on: 2013/05/06 07:14:36 AM >>>> avast! - copyright (c) 1988-2013 AVAST Software. >>>> http://www.avast.com >>>> >>>> >>>> >> ------------------------------------------------------------------------------ >>>> Introducing AppDynamics Lite, a free troubleshooting tool for Java/.NET >>>> Get 100% visibility into your production application - at no cost. >>>> Code-level diagnostics for performance bottlenecks with <2% overhead >>>> Download for free and get started troubleshooting in minutes. >>>> http://p.sf.net/sfu/appdyn_d2d_ap1 >>>> _______________________________________________ >>>> Emc-users mailing list >>>> [email protected] >>>> https://lists.sourceforge.net/lists/listinfo/emc-users >>>> >>> Peter Wallace >>> Mesa Electronics >>> >>> (\__/) >>> (='.'=) This is Bunny. Copy and paste bunny into your >>> (")_(") signature to help him gain world domination. >>> >>> >>> >> -- >> Regards / Groete >> >> Marius D. Liebenberg >> MasterCut cc >> Cel: +27 82 698 3251 >> Tel: +27 12 743 6064 >> Fax: +27 86 551 8029 >> Skype: marius_d.liebenberg >> Skype Me^(TM)! <skype:marius_d.liebenberg?call> >> Get Skype <http://www.skype.com/go/download> and call me for free. >> >> >> >> >> --- >> avast! Antivirus: Outbound message clean. >> Virus Database (VPS): 130506-0, 2013/05/06 >> Tested on: 2013/05/06 09:57:16 PM >> avast! - copyright (c) 1988-2013 AVAST Software. >> http://www.avast.com >> >> >> >> ------------------------------------------------------------------------------ >> Learn Graph Databases - Download FREE O'Reilly Book >> "Graph Databases" is the definitive new guide to graph databases and >> their applications. This 200-page book is written by three acclaimed >> leaders in the field. The early access version is available now. >> Download your free book today! http://p.sf.net/sfu/neotech_d2d_may >> _______________________________________________ >> Emc-users mailing list >> [email protected] >> https://lists.sourceforge.net/lists/listinfo/emc-users >> -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg Skype Me^(TM)! <skype:marius_d.liebenberg?call> Get Skype <http://www.skype.com/go/download> and call me for free. --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 130506-0, 2013/05/06 Tested on: 2013/05/07 07:17:57 AM avast! - copyright (c) 1988-2013 AVAST Software. http://www.avast.com ------------------------------------------------------------------------------ Learn Graph Databases - Download FREE O'Reilly Book "Graph Databases" is the definitive new guide to graph databases and their applications. This 200-page book is written by three acclaimed leaders in the field. The early access version is available now. Download your free book today! http://p.sf.net/sfu/neotech_d2d_may _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
