PC MILL 155 EMCO CNC Machine, DNC Interface

[aleyva]

Hello,

I'm using the DNC communication protocol to transfer a NC Program from a Visual C++ Based Program to the PC MILL 155 EMCO CNC Machine.

I already can transfer a package (NC program) less or equal than 256 bytes of size.

How can I make the CNC wait for another package after I sent the first one?

My problem is about finding the way that the CNC Machine is expecting me to send a sequence of data packages using the DNC communication protocol.

I know there is a way since the documentation I have of the protocol states that you can enumerate the packages to be sent, but it doesn’t say what are the protocol commands you need to send to the CNC between the packages.

Thanks,
Agustin Leyva

 

[EdDanzer]

Check these parameters to make sure both ends have the same settings. Baud rate, if to fast in relation to the cable length incomplete transfers will happen, both ends must be set the same speed, and when in doubt start as slow as you can and work up to higher speeds. Turn off the Xon/Xoff, some older communications don’t support it. Make sure you are using the same number of stop bits and code protocol.
Another thing to do if all else fails, by a breakout box with lights to see if and when data is transmitting at the control, and check jumper locations.
Also see if you can send a program back.