Dynomotion

Group: DynoMotion Message: 10867 From: TK Date: 1/18/2015
Subject: Re: Strange, almost unpredictable machine movements while jogging in
Not sure what that could be. Maybe try a different Version of Mach3?   What Version are you running?  Have you tried different Jog Speeds?  Is it only keyboard keys?  Or also with mouse click jogs?

Regards
TK

On Jan 18, 2015, at 10:29 AM, wgripp@... [DynoMotion] <DynoMotion@yahoogroups.com> wrote:

 

Hello I'm having some issues while keyboard jogging in Mach3.

In particular, the machine makes almost impredictable movements in response to short keyboard arrow (and Page Up/Down) "clicks", in the right direction. Sometimes it moves a tiny bit, sometimes it stands still, some other times it makes larger moves, not proportional to che keyboard press.

Sometimes it *looks like* Mach3 "accumulates" key press times to make a single larger move.

KMotionCNC, loading the very same init.c works prefectly instead.

What can I check, try to fix this ?

Thanks, best regards
Group: DynoMotion Message: 10868 From: wgripp Date: 1/18/2015
Subject: Re: Strange, almost unpredictable machine movements while jogging in
Hi, thank you for your answer. It happens while continuous jogging, both when hitting the keyboard and clicking with the mouse over the arrows after pressing the Tab key in Mach3. The behaviour is the same at different jog speed overrides.

Single step jogs look ok both shorter and long ones.

Thanks again for your support.
Group: DynoMotion Message: 10869 From: wgripp Date: 1/18/2015
Subject: Re: Strange, almost unpredictable machine movements while jogging in
I should also add that this is the same machine that needed to increase, in Mach3 only, the Look ahead lines to avoid unexpected pauses while running a gcode from Mach3.
Mach3 version is .043.066
Group: DynoMotion Message: 10870 From: Tapio Larikka Date: 1/18/2015
Subject: Re: Strange, almost unpredictable machine movements while jogging in

Hi!
 
Check the mach general config/jog increments settings. Sounds like the same annoying behavior that I had.
First as if it would not jog and then leaped forward.  Cost me several end mills.
Also disable any antivirus if any running.
 
Rgds,
Tapio
 
 
Group: DynoMotion Message: 10873 From: Tom Kerekes Date: 1/18/2015
Subject: Re: Strange, almost unpredictable machine movements while jogging in
I tested on my system with Mach3 Version 3.043.066 and it does seem less responsive than KMotionCNC.  I think it might be that Mach3 only updates the Keyboard and/or the plugin about every 100ms.  So key presses less than that length of time are somewhat hit-and-miss.  I don't really see any accumulation of jogs.  Could the 100ms sampling explain what you observe?  For small jogs the CTRL key will allow you to do "steps" rather than continuous jogging.  Connecting an MPG directly up to KFLOP can provide guaranteed deterministic smooth motion that doesn't depend on MS Windows.

Regards
TK

Group: DynoMotion Message: 10877 From: wgripp Date: 1/19/2015
Subject: Re: Strange, almost unpredictable machine movements while jogging in
Hello,

thank you for your answers Tapio and Tom !

He have made other tests, both on the first machine, also changing the PC, and in my personal system too. The behaviour is the same.

Here's a video of my personal machine (CL stepper driven): Jog issue

 


In the first part I keep the key pressed longer and everything is OK, in the second part I "tap" the key.

This is not the way I usually jog, I prefer single step jogging when I'm close to the target, but the colleague that is testing the first machine reports that back when he was using the parallel port he could reliably jog this way. He also reports that DRO's only change in Mach3 when a movement is effectively made, so this could be more a Mach3 issue. I'll conduct more tests on this too.

I second that a pendant connected to the KFlop would be option #1 to solve this.


 
Group: DynoMotion Message: 10878 From: Tom Kerekes Date: 1/19/2015
Subject: Re: Strange, almost unpredictable machine movements while jogging in
Hi wgripp,

We did find that we were waiting for the next "update" call from Mach3 before starting the Jog motion.  Here is a patched plugin compatible with Test Version 4.33k that seems more responsive.  Copy to your Mach3\PlugIns\ folder.  Please give it a try and let us know if it helps.


Regards
TK


Group: DynoMotion Message: 10884 From: wgripp Date: 1/20/2015
Subject: Re: Strange, almost unpredictable machine movements while jogging in
Hi Tom,

thanks so much ! The new plugin perfectly solves the keyboard issue.
On a side note, not an issue to my eyes, the behaviour still remains when clicking with the mouse pointer over the jog arrows, after pressing Tab in Mach3.

Thank you again !


---In DynoMotion@yahoogroups.com, <tk@...> wrote :

Hi wgripp,

We did find that we were waiting for the next "update" call from Mach3 before starting the Jog motion.  Here is a patched plugin compatible with Test Version 4.33k that seems more responsive.  Copy to your Mach3\PlugIns\ folder.  Please give it a try and let us know if it helps.


Regards
TK