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Jeffee

incremental Gcode

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Posted · incremental Gcode

Hi! I am building a 3D printer, and writing code for controller. The default g-code generated by Cura is using absolute locations, which makes the coding more difficult.

So, I am wondering if I can change settings in Cura software, to let it generate g-code using incremental / relative locations (for all x,y,z,e)?

Thank you!

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Posted · incremental Gcode

I don't know if cura supports relative movement. Probably not. The UM printers support it I think.

Anyway, why is this so hard? Just have one variable for x,y,z,e axes and subtract the gcode from the current location and that gives you your incremental movements. Very easy.

Actually incremental movements are a problem. A serious problem. If there are floating point errors (and there will be) then errors can build up and what will happen is that each layer will be shifted a bit from the layer below. So really - incremental gcodes won't work very well for 3d printing.

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Posted · incremental Gcode

I don't know if cura supports relative movement.  Probably not.  The UM printers support it I think.

Anyway, why is this so hard?  Just have one variable for x,y,z,e axes and subtract the gcode from the current location and that gives you your incremental movements.  Very easy.

Actually incremental movements are a problem.  A serious problem.  If there are floating point errors (and there will be) then errors can build up and what will happen is that each layer will be shifted a bit from the layer below.  So really - incremental gcodes won't work very well for 3d printing.

Thank you!

I've get it done. I made a mistake, I defined some variables at the beginning, which makes them constants.

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