Missing Steps on manual Jog

[RC3Rob]

Hi all.

I have recently upgraded my chinse fake CNC machine to have a Planet CNC mk3 control board and the latest software. ( I didn't know until the machine arrived that it was a copy of the planet cnc kit...) i have now bought the mk3 board and a valid license from Planet CNC!

I ham having issues with Jog, in that when the machine runs a program it moves the stepper motors smoothly and cuts fine, but if I move the tool by using the keyboard jog functions the stepper motors do not run smoothly and miss steps, meaning that my zero position has changed.

I have tried going through both the old forum and this one to see if I can find the issue anywhere else, but I am at a loss!

I have attached my settings file. can anyone help me please.

Regards

Rob

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[ijchan223]

Try lowering the jog speed to the same as your cut speed.

[PlanetCNC]

Your computer only has 2 CPU cores. For TNG 4 CPU cores are recommended.
Jogging uses low buffer mode and it might be that your CPU can not handle.

[RC3Rob]

thanks for the replies, i shall try lowering the jog speed, if it is any help, when i manually jog, the speed indicator within the program flashes between 0 and 400...

I will try lowering my jog speed and see if that helps though!


is there any way of testing if it is the number of cores on the pc?

[PlanetCNC]

You can try connecting controller via USB hub. This helps on some older motherboards.
Check CPU utilization during jogging. It will be way to high.
Lower refresh rate or even disable 3D panel.
But you should get better PC. You can get decent computer at very reasonable price. Yours is from XP era and not really capable of running Win10.

[tantemay]

Why 4 cores? I am using a Core 2 Duo. So that's not good enough for TNG V2.

[tantemay]

The question is meant seriously.

[PlanetCNC]

One core runs in high priority calculating commands (motion planner). There is not much time available, specially if you want responsive controller. And jogging needs to be responsive.
This leaves only one core for everything else. This means slow display and everything else. In case OS decides that it needs to do something and that this high priority thread is interrupted it might lead to lost step.
Keep in mind that new command for controller is needed every millisecond.

[tantemay]

With me the problem is now too.
The old PC a Core 2 DUO Windows 10. Everything works perfectly.
Now the new PC Core I3 Windows 7. everything works. Unless the manual jog is a disaster. How can one?

Edit: I just checked it again. It also happens with homing.
The engines then screech a lot

[PlanetCNC]

Help/Show Log... shows physical and logical CPU cores. How many do you have?
Which CPU do you have?
Check CPU utilization

[tantemay]

The Core i3 has two cores.


I have now installed Windows 10 and the problem is resolved.