> 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 -- 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
