[amitkumar171]

Hello Guys,

Lately i have been facing a problem with the 5 - Axis machine that I am working on. The rotation of C - Axis stops at a particular code.

For Example:

N220 X0.267 Y-19.998 Z49.809 C0.7653
N225 C0.7636........................................... ................................[MACHINE HALTS AT THIS CODE, I CLICK STOP AND THEN START THE CYCLE FROM THIS LINE]
N230 X0.134 Y-20 Z49.866 C0.3826
N235 X0.133 C0.3809
N240 X-0.001 Z49.885 C-0.0017
N245 C-0.0035............................................ .............................[WORKS PERFECTLY]
N250 X-0.135 Z49.865 C-0.3861
N255 C-0.3878................................... ..................................... [MACHINE HALTS AT THIS CODE AGAIN, I CLICK STOP AND THEN START THE CYCLE FROM THIS LINE]
.
.
.
.
.

SO ON

When i simulate the same G-Codes in K-MotionCNC it work fine without any pause. I tried to run the same G-Codes on the machine multiple times and each time it stops at that exact line.

Has anyone faced a similar problem with their machine.

Your suggestions on this topic will be helpful to overcome the hurdle.

Thank you in advance


Vignesh M

[RCaffin]

But why does the machine stop? Is it an eStop? Is the C axis jamming?

Cheers
Roger

[islaww]

Any chance there is a soft limit that wont allow the negative position?

[Blackened]

Looks to me like it may need an x,y or z axis specified in each line, and doesn't like a C axis only line? Assuming you're running in absolute mode, just copy the previous X dimension and paste it onto the line with only a C axis move and see if that helps? You show one example of a C axis only line that works fine though, so maybe not.

[TomKerekes]

Hi Amit/Vignesh,

This looks to be a bug in our code. We've been able to reproduce the problem but we will need time to come up with a fix.

So far it seems to be related to combining pure angular moves and mixed xyz+angular moves and rounding/smoothing calculations with some numerical error that results in a move of like 1e-12 inches at a feedrate of 1e-18 ips that would take hours to complete.

Regards

[TomKerekes]

Hi Amit/Vignesh,

Please try this patch. It is compatible with Test Version 4.34j. Copy the library to the \KMotion\Release folder
http://dynomotion.com/Software/Patch...nterpreter.dll

This should no longer attempt to smooth the segment of pure angle with a non-pure angle segment (which shouldn't make sense).

Modified source files if needed are located here:
Index of /Software/Patch/FixTPMixPureAngleNonPureAngle_V4.34j

Please let us know if it resolves the problem.

Regards