JeffLowe Posted January 26, 2011 Share Posted January 26, 2011 Do you have a detail plot setup for displaying the Lissajous of an ACC51 to allow the signals to be checked for bias and clipping? Similarly for the ACC24E3 with 1V encoders? Link to comment Share on other sites More sharing options...
Sina.Sattari Posted January 26, 2011 Share Posted January 26, 2011 Jeff, Yes. You will have tools in Power PMAC Setup add-in which is included in January release of IDE. We should release before Monday 31 Jan 2011. Regards, Link to comment Share on other sites More sharing options...
bradp Posted January 26, 2011 Share Posted January 26, 2011 Here is one for the ACC51E. [attachment=1425:name] For the ACC24E3 you have many alternatives. There are structures that have the ADC data in them that you can very easily plot since the plotting is so simple to setup. Also the motor setup has an encoder test page that will show you this automatically (just need the Jan release IDE which is coming soon) Link to comment Share on other sites More sharing options...
JeffLowe Posted January 30, 2011 Author Share Posted January 30, 2011 [quote='bradp' pid='1195' dateline='1296061187'] Here is one for the ACC51E. For the ACC24E3 you have many alternatives. There are structures that have the ADC data in them that you can very easily plot since the plotting is so simple to setup. Also the motor setup has an encoder test page that will show you this automatically (just need the Jan release IDE which is coming soon) [/quote] Tomorrow might obviate the need, but how do I open a .dpc file in the IDE? Link to comment Share on other sites More sharing options...
bradp Posted January 31, 2011 Share Posted January 31, 2011 I thought this was two seperate topics. The .dpc is for Turbo Pmac and can not be used with PowerPmac. Link to comment Share on other sites More sharing options...
JeffLowe Posted February 3, 2011 Author Share Posted February 3, 2011 [quote='bradp' pid='1238' dateline='1296491149'] I thought this was two seperate topics. The .dpc is for Turbo Pmac and can not be used with PowerPmac. [/quote] How do I plot the lissajous of an Acc51 on a Power PMAC using the previous revision of the IDE? (The latest version is perhaps a bit too new for a system that is within a couple of weeks of final acceptance) Link to comment Share on other sites More sharing options...
Sina.Sattari Posted February 3, 2011 Share Posted February 3, 2011 Jeff, You can use the Plot program under Tools menu to plot the Lissajous for ACC-51E encoder feedback. Just set it up based upon the following image: [attachment=1433:name] Here is what I get: [attachment=1434:name] Link to comment Share on other sites More sharing options...
michaelthompson Posted February 17, 2011 Share Posted February 17, 2011 [quote='Sina' pid='1278' dateline='1296761066'] Jeff, You can use the Plot program under Tools menu to plot the Lissajous for ACC-51E encoder feedback. Just set it up based upon the following image: [/quote] Sina, We have a pretty nice Lissajous scope-mode program that we wrote ourselves and that we use with the Turbo PMAC and ACC-51E boards. See attached image. We have not yet modified the program to work with the Power PMAC. It is written in VB6 and my programmer has not been successful at interfacing from VB6 to the Power PMAC Comm Library. All that he needs is a GPASCII session, but he wasn't able to get it to work from VB6. I have the following suggestions as you develop the Lissajous support within the IDE: 1. Default to dot mode instead of line mode. When in line mode, if you move the axis fast, the lines zig-zag across the display. 2. Keep a buffer of N points to give the display persistence. Each refresh should hide the points which fell out of the buffer while showing the new points added to the buffer (or you can do a full refresh with bitmap paints if you prefer). With this sort of mode, as you move the encoder or jog the axis, you will get a nice circle of dots instead of zig-zag lines. When you stop moving, the dots will fade away until you are left with the dither of the encoder around the current position. 3. Display max and min signal strength values and allow them to be reset. 4. Scale the graph and signal level values in volts (or at least allow the option to switch between volts and A/D counts). E-mail me if you'd like more information. I can also have my programmer send you the source code and/or executable for your evaluation. Mike [attachment=261] Link to comment Share on other sites More sharing options...
michaelthompson Posted February 17, 2011 Share Posted February 17, 2011 [quote='Sina' pid='1278' dateline='1296761066'] Jeff, You can use the Plot program under Tools menu to plot the Lissajous for ACC-51E encoder feedback. Just set it up based upon the following image: [/quote] Sina, We have a pretty nice Lissajous scope-mode program that we wrote ourselves and that we use with the Turbo PMAC and ACC-51E boards. See attached image. We have not yet modified the program to work with the Power PMAC. It is written in VB6 and my programmer has not been successful at interfacing from VB6 to the PMAC Comm Library. All that he needs is a GPASCII session, but he wasn't able to get it to work from VB6. I have the following suggestions as you develop the Lissajous support within the IDE: 1. Default to dot mode instead of line mode. When in line mode, if you move the axis fast, the lines zig-zag across the display. 2. Keep a buffer of N points to give the display persistence. Each refresh should hide the points which fell out of the buffer while showing the new points added to the buffer (or you can do a full refresh with bitmap paints if you prefer). With this sort of mode, as you move the encoder or jog the axis, you will get a nice circle of dots instead of zig-zag lines. When you stop moving, the dots will fade away until you are left with the dither of the encoder around the current position. 3. Display max and min signal strength values and allow them to be reset. 4. Scale the graph and signal level values in volts (or at least allow the option to switch between volts and A/D counts). E-mail me if you'd like more information. I can also have my programmer send you the source code and/or executable for your evaluation. Mike [attachment=261] Link to comment Share on other sites More sharing options...
Sina.Sattari Posted February 21, 2011 Share Posted February 21, 2011 Michael, Thanks for the suggestions. we currently have the N buffer points in the graph which resembles fading out, but we will implement the rest of the suggestions. Regards, Link to comment Share on other sites More sharing options...
dzrong Posted October 26, 2016 Share Posted October 26, 2016 I'm using ACC51E with PPmac,and find lots of niose in the ADC, I want to add a low pass filter to the ADC by EncTable,and get the Sinusoidal feedback position. But how to set that? Link to comment Share on other sites More sharing options...
bradp Posted October 26, 2016 Share Posted October 26, 2016 Of course with ACC51E you could have a lot of noise on the ADC. But usually a Lissajou with a small hole in the middle is a sign that the sine wave of the encoder was rather fast compared to the data gather sample time. reading the ADC when the motor is stationary is clearer for me to see ADC noise. attached is an excel that you can use together with the SRM to calculate the filterECT Tracking Filter.zip Link to comment Share on other sites More sharing options...
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