customising gcode

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customising gcode

Postby Ttoch » 2014-Sep-Wed-09-Sep

I have had my simple metal a few weeks. I have been creating some print designs in OpenSCAD and that has been fun. But I am also interested in trying to write my own gcode directly and creating tools to programmatically generating it my self to see if I can find better ways to generate paths or different ways things I can do with the printer.

I have been reading through the firmware source code to see how it works and the reprap gcode wiki are there any other good sources of information?

I wanted to find out what the actual accuracy of the simple metal is in steps per mm, so that I can calculate gcode values better by doing a sort of reverse anti aliasing to make diagonal lines smoother and just for getting a better understanding of the printers theoretical capabilities. I think I found where the information should be in the source code. In the Configuration.h file "#define DEFAULT_AXIS_STEPS_PER_UNIT {63.36,63.36,2272.72,590} ", but I don't know what actual configuration values would have been used for the Simple Metals firmware. Does anyone know how many steps are in a mm for the 4 different motors on the Simple Metal?

I am also interested in understanding understanding more about how arcs are represented and processed in gcode?
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customising gcode



Re: customising gcode

Postby RetireeJay » 2014-Sep-Wed-09-Sep

Your actual calibration values can be read out using an M503 command - which displays them in the log at the bottom of the Repetier screen. The defaults in Configuration.h may or may not match what is actually in use. See viewtopic.php?f=18&t=2763 and also the discussion on the EEPROM values in this Wiki entry: ... are_Update

Good luck. :)
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Re: customising gcode

Postby Mooselake » 2014-Sep-Wed-10-Sep

You may need to use the pencil looking thingie in the Repetier-Host icons to make the log appear. Even took me a while to figure that out with the latest R-H.

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