Problem with jerky cutting

alexwalex · Posted at 2018-5-9 03:36:47

Hi Androcles ! I tested you programm in my controller. https://youtu.be/RMO-UQGULYk
And i not see a noticeable slowdown. Only at the end of the program present there is a slight slowdown:
https://youtu.be/pxYPNGNlHjY
Parameters of my controller:
34,35 - 800
45,46 - 1000
263,264 - 2000
99 - 1000

ytliu · Posted at 2018-5-9 06:13:12

Hi,Androcles!
Is the processing file in the video different from the file you provided on the forum, can you upload the file used in your video? Also, you can copy the /mnt/nand1-1/setting file to a USB flash drive and upload it. It's easy for us to analyze. Thank you!

Androcles · Posted at 2018-5-10 05:13:00

"alexwalex"
I just tried using your settings:
"34,35 - 800
45,46 - 1000
263,264 - 2000
99 - 1000"
and oddly enough when i changed the acceleration parameters in manual mode to your values it stopped doing the jerky moves. Those accelerations were far too high for my machine though because of the inertia in the gantry.

But then I reverted and used the following values:
34: 160
35: 400
45 and 46: 100mm/s^2
263 and 264: 100mm/s^2
99: 300mm/s^2

And now it runs the file smooth..
It seems as if there is something weird going on with this controller...

"ytliu"
The file is the same as the one I uploaded earlier. And here are my current settings attached were things are working but maybe you can spot something weird.

Androcles · Posted at 2018-5-10 15:50:41

I am completely at a loss right now...

I just tried the attached file and it was really bad, it looked like the machine could have ripped itself apart.
Here is a video of it.
https://streamable.com/gs4uf

With the settings in the attached pictures.

I also tried lowering all the accelerations to 100mm/s^2 but it was completely the same as in the video I linked to.

What the hell is wrong with this controller, movement with the mpg pendant is smooth as ever and it seems like it is using the parameters for manual control but when excecuting G-code it is just al over the place and troubleshooting is nearly impossible...

ytliu · Posted at 2018-5-10 16:13:55

Hi,Androcles
I read the configuration file you provided earlier and found that the pulse equivalents of the X and Y axes are not the same. This will cause a hard arc fault. You can set the pulse equivalent to the same, or use a soft arc method.

Androcles · Posted at 2018-5-11 03:07:44

Okay, it seems to be working now, adjusted the steps so they are the same on all axes.
The weird thing is that I started with it like that, 160pulses/mm on all axes, and it still failed as shown in the first video.

But I will try to post back here if it gives me trouble again.

Thanks a lot for all the help, really appreciate it!

BTW, are there any new functions/features planned for this controller?

Hamidnaseer · Posted at 2019-12-5 13:29:18

AOA
I have DDCSV 3.1 .I purchased a fresh piece.Its input output and mpg ports are not working .
I did all the wiring according to the instructions .Plz help me
And how to reset the controller setting.

Problem with jerky cutting

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