Set up using AMC AB15A100 drives, brushed DC motor Prototrak Plus with Encoders

Todd, Many Thanks! If I have understand you correctly, the line that needs to be "#" are the lies start with: "# x-out (9 lines from bottom in attached pic) & or #y-out (7 lines from bottom in pic). Currently the scope is connected to the "y" axes, so this is the one I will try 1st, so the # will be removed from the "y" axes or line 7. This will not allow signal to "x" axes, because # is on line 9. I am still pondering your last post, it will make more sense when I get to that, maybe.

Edit: lines 6 and 8 from the bottom, are the lines to use # with, not lines 7 and 9 from bottom.

Many thanks!
 

Todd, Thanks!! After re-reading your posts this is the 1st traces. I have a few traces, but they look very close to each other. When starting a new trace; press the "enable servo drive" on "test" screen; used "auto" on o-scope and adjusted the 0-scope to make best trace, if I adjust blue trace to spread out (left to right) the yellow trace gets tall & thin. I am not shore I got it correct. I have # on the "x" axes (in the "test" file) because o-scope is hooked up to "y".

Many thanks
 

What frequency do you have Siggen generating? While the default of 100hz was a good frequency for tuning the current loop, it is going to be way too fast for the mechanics of the machine to react for tuning the velocity loop.

Todd, Thanks! I am reading from the "Test" screen, at the bottom, Freq=100Hz: (next line below) Amp+1.0Volt: & (last line) Offset=0.0Volt.

When I do the "test" will the motor be up to "cruse speed" for a short distance? I have used Pot 4 to stop both axes and worked well.

Many thanks

Todd, Thanks! I tried 5Hz, but almost violent axes motion, only allowed for a second, to oscillate. Went to 10Hz with a pic attached.
Many thanks
 

Todd, Thanks! This pic is at 8Hz, (this moves the saddle, very quickly about 1/8") the o-scope trace does not get the plateau "cruse part" area. Should I slow feed rate down? I tried the o-scope settings to get best pic.
Many thanks

The motion for this test is going to be violent. (Sorry If I left out that warning.) It is going to accelerate the motors and the drives at their maximum. Only run it long enough to get a reading then disable again. It is entirely possible you could brake something doing this test. It looks like 10 is still a little too fast, but it is getting some readable motion. I think 5 or 2 or 1 are going to probably be about the right frequency. If it is a little too violent, reduce the voltage command so that the sustained speeds are lower (maybe a half or 1/4 volt might be better than 1v.)

Sorry I didn't read your post correctly, 5hz was still too fast. Try 1hz, and maybe 1/2v.

Lowering the speed command (voltage) will also hopefully make it easier and reduce the time needed to achieve a stable speed.

At this point in the 5 and 8 hz traces the machine is still a long way from reaching the commanded speed, and is changing directions while it is still accelerating.

Todd, thanks! I have tried several settings, when I am close how will I tell? The traces I offered so far, I have not seen the plateau in the trace, this will be present in the blue trace when correct? I understand there will be some trial & error until the values (the volts & Hz) in the "test" screen are "zeroed in on", so the SW2 settings can be seen and adjusted then. Just wondering what I am looking for in the traces? I will start fresh in the morning.

Many thanks!