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General Mach Discussion / HELP g-code command lines and coordinates not synchronized
« on: May 11, 2019, 04:41:12 PM »
Hi can i get some hint on the problem below:
I have a hobby cnc running on mach3, with USB controller NVUM.
When load a g-code it works fine, as I have a standalone manual controlled spindle. Unless when i want to use the cnc for laser, then it could be realized the command lines flow faster than the coordinates or the motion. The motion is actually synchronized with coordinates so I guess my motors are correctly tuned. The issue could be seen e.g. when I try to draw a square with laser, the command is already shifted to the 2nd line when the 1st line is not yet finished, at its 90% maybe. Then the g-code command will come to the end about 2 seconds before the machine moves to the end point, together with its coordinates.
The machine will move as per the g-code, only thing is the laser control commands come together with the command line shifted to it. If I replace the laser commands with Z-axis movement then the machine will do them in the correct sequence, although the command line still flows ahead. I.e. the problem is always there, one only feels it when using output. My laser is controlled by M3/M5, also tried user command M113/M115 to control the output #1 directly.
Not sure if I have made myself understood. If yes is this a real problem?
Computer is Win7, also tried to install WinXP on the same machine but with exactly the same effect.
I have a hobby cnc running on mach3, with USB controller NVUM.
When load a g-code it works fine, as I have a standalone manual controlled spindle. Unless when i want to use the cnc for laser, then it could be realized the command lines flow faster than the coordinates or the motion. The motion is actually synchronized with coordinates so I guess my motors are correctly tuned. The issue could be seen e.g. when I try to draw a square with laser, the command is already shifted to the 2nd line when the 1st line is not yet finished, at its 90% maybe. Then the g-code command will come to the end about 2 seconds before the machine moves to the end point, together with its coordinates.
The machine will move as per the g-code, only thing is the laser control commands come together with the command line shifted to it. If I replace the laser commands with Z-axis movement then the machine will do them in the correct sequence, although the command line still flows ahead. I.e. the problem is always there, one only feels it when using output. My laser is controlled by M3/M5, also tried user command M113/M115 to control the output #1 directly.
Not sure if I have made myself understood. If yes is this a real problem?
Computer is Win7, also tried to install WinXP on the same machine but with exactly the same effect.