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It does look like a servo from the picture.

What do the drives look like?

John

They feel like servos,the movement is fluid.X and Y axis are belt driven by a servos. The real question is, can it be operated with EMC ? What hardware is needed? I am sorry guys,but this kind of machinery is new to me as i used to work with SolidCam and this is the first time i buy my own machine. The fact that i got it working so far is no more than a miraculous event for me. If i only i could make it work with preferably linux system ,i would be a very happy man.

Maybe serial to parallel converter can be used?

If it takes HP-GL codes from the serial port there is no reason it couldn't take them from a Linux machine.

I have written software (in Gnu octave) which controls a Roland plotter this way. In my case I was using a Mac and a USB to serial convertor and the Octave code was used to slice an STL file and cut out layers to build up a model.

You can probably drive your plotter from a serial terminal application, just typing HP-GL codes. I can't remember many of them at the moment, just PU for pen up and PD for pen down. It's a very simple language though.

EMC2 is not likely to be much help with the machine configured as it currently is. EMC2 converts G-code into motor movements. Your current machine has a built-in system that converts a different language into motor movements. To use EMC2 you would need to replace all the current "intelligence" with EMC2.

It is possible that the current system has individual servo drives for each motor. If that is the case then you would need to remove the current motion controller, and connect EMC2 to those drives instead. If the power electronics are integral with the motion controller, then things are rather more difficult.

Pictures of main board

2

The system board manufactured by Zilog. DNC program called DNC-X successfully sends files to the machine.
Is there a way to figure out how this router read .plt files i send? And how a replace it's "brains" with EMC?

A Z80? Wow!

What numbers are on the devices bolted to the heatsinks on the middle board?

What you have is effectively a printer. HPGL is a printer/plotter control language and with the right (generic) drivers you ought to be able to simply print to your engraver from any graphics package. (Best results will be from vector graphics software).
A quick Google suggests that Inkscape will output HPGL.

Alternatively, if you want to control the machine as a CNC machine using EMC2 and G-code you are looking at a complete retrofit, replacing the motor drives and controller (but you should be able to retain the motors and encoders).
Deciding the best way to retrofit does require knowing what the motors are (stepper or servo). The fact that I see 4 tracks to each motor on the backplane makes me suspect stepper, but one could easily be an earth.

I just got a reply from SEI support.

this machine runs with our software CCI, or with a software that use HPGL standard command (for example Autocad).

writing on system board

and another view