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Topics - cdf

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General Mach Discussion / Mach3 randomly pausing
« on: November 04, 2013, 07:15:46 PM »
Ever since I got started with my cnc table I have been having an issue with mach3 randomly pausing during tool movements. Everything slams to a stop for just a second (including the dro) and then starts again suddenly. I have turned off the screen saver and set the computer to not sleep. I have turned off the firewall. The computer is not connected to a network. Mach3 is a new copy I bought about a month ago. I cant figure out why it pauses and I have just been dealing with it. Now tonight I am trying to mill an aluminum plate and the pauses are really screwing me up. Before tonight after the pause everything has always resumed normally. Now I am having an issue where after the pause the dro will sometimes reset to x0 y0 at whatever position the pause happened at. The pauses have only been a minor issue until now but with the dro resetting to x0 y0 its ruining my work. The pauses happen in the middle of a move, not at a new line of code. My task manager says I'm using around 5-15% of the cpu capacity during machining operations. The computer is a 2.8ghz Pentium 4 with 1gb of ram. What could be causing this?

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General Mach Discussion / Using the B axis for my 4th axis?
« on: September 03, 2013, 09:12:41 AM »
I have a 4 axis cnc router running on mach3. It uses 2 steppers on the Y axis. I have been using it as a 3 axis machine with success. I built the electronics box with a g540 running the A axis slaved to the Y axis. I also have installed a Chinese breakout board with a g251x in my electronics box with the intention of running the 4th axis off it. This works fine as far as being able to manually jog the 4th axis. The first problem came when I realized that the gcode from rhinocam wanted to control the 4th axis with the A axis in mach3. I then switched things around to run the 4th axis on the A axis of the g540 and slaved the B axis on the Chinese breakout board to the Y axis. In this configuration I can't get the Chinese board to play nice being slaved to the G540.

Is there a way to run the 4th axis from the B axis so I can leave the four X,Y, and Z stepper motors on the g540 since they all play nice that way?

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