Hi, sorry for my english!
I develop a plugin for an italian company that use Mach3.
I try to connect Mach3 with USB... before this I try to print in a console data inside Engine->Trajectories array after load a gcode, with this simple code:
void USBPlugin::update (void)
{
    if (Engine->TrajHead == Engine->TrajIndex)
    {
        PluginConsole::getInstance()->printMessage("Same positions...");
        return;
    }
    else
    {
        Engine->TrajIndex++;
        PluginConsole::getInstance()->printMessage("New positions...");
    }
}
this function is called by myUpdate().

When I run the application and stop with breakpoint the trajectory elements are all empty.

Can you hel me?

best regards
Marco Giammarini

Check my virtual plugin - it does work :-)

http://www.machsupport.com/forum/index.php/topic,17612.0.html

Check my virtual plugin - it does work :-)

http://www.machsupport.com/forum/index.php/topic,17612.0.html

thanks for the reply!

i have just see your plugin and i have added this lines to myInitControl function:

/* For 1ms timed waypoints... */
MainPlanner->ExTime = .001;
/* For variable ms timing... */
MainPlanner->ExternalType = EX_VMS;
/* Setup external pulse rate */
for( int x = 0; x < 7; x++ )
{
MainPlanner->ExternalPulseRates[x] = 1000000;
}

in this case the data exist in the trajectories array... but the appliccation don't work very well.
This is my step:
1) load gcode example with Mach3Mill profile.
2) press reset button
3) press cycle start...
4) the gcode stop at the third line where the gcode is
G90
G49
M3 S15000
G0 X52.000 Y27.663 Z7.472
G1   Z-0.500 F200
G1 X52.000 Y27.663 Z-0.500 F1200
X33.344 Y20.577
X33.197 Y20.535
X33.033 Y20.520
X32.858 Y20.537
...
5) press stop
6) press reset
7) and press another time cycle start
after this step i found data in array but in mach3 application the table display don't move and the disply for the axis don't move.

why?

if i disable the plugin, all works well!!

can you help me?

Does it work if you run the code in my virtual plugin ?

I have VS2003 and I can not compile your plugin. 

You can download Visual Express 2010 and try. Not sure if 2003 is supported for Mach plugins.

One more thing - you may have to install Mach plugin wizzard as well - I think my project refereces some files from there ( instead of SDK)

You can download Visual Express 2010 and try. Not sure if 2003 is supported for Mach plugins.

I start to download VS2010 express.... VS2003 is supported, indeed the video tutorial is on VS2003.

Here you have it : http://www.joshua1systems.com/machpluginwizard/

I have run your GCode. As far as I can tell your problem comes from lack of Dwelling support.