You can make your program allow for that by adding some extra steps when the direction changes - as long as the backlash is consistent. I wouldn't worry too much about backlash. Making a robust machine that can handle the heavy loads for metal cutting would be a major task. I had started adding a sensor to detect the position of the chuck so as to synchronize the feed for screw cutting - but like a lot of my things the need evaporated before I got that finished It seems to work properly but I have actually used it very little.
And I wrote a Python program for my PC to allow manual control and to interpret simple GCode and convert it to numbers of steps for the motors (actually the total time for a move and the time between steps for each motor) which it sends to the Arduino. I wrote a simple Arduino program to control them. I added 3 stepper motors (X, Y and Z axes) to a small lathe (Sieg C1).
I reckon it would help if you explain the sort of tasks you want your CNC to do. I have been searching the internet and have tried numerous ideas and different cad programs without success Open the CB created/exported dxf file in some other program (FreeCAD, or ViaDAD or other) and save in different dxf version. I had a problem with the SVG files from a newer version of LibreOffice. Possible to have a feature compatible with Inkscape. I do my 2D drawing with LibreOffice 4.3 Draw which I think is better than InkScape and which can export SVG files that Inkscape can use. I know nothing about SolidWorks and I have never put in the time to learn proper 2D Cad, never mind 3D. but i have not found a way to generate GRBL code from there. I have an old version of SolidWorks that was given to me due to it being outdated.
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