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polygontwist / Laser_image_engrave_converter

generate gcode from jpeg,png,bmp with JavaScript
MIT License
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slow engraving speed #3

Open mkeyno opened 7 years ago

mkeyno commented 7 years ago

hi @polygontwist ,I've trying to use grbl .9j & 1.1f as controller of my 80W laser cnc but when I import converted image to machine , it shows very little speed regards to other machine , do you have any idea why engraving speed so little ? its due to convertor or grbl setting ?

polygontwist commented 7 years ago

hi @mkeyno you set the speed with "Feedrate-burn". But if there are very many intermediate points, it can be slower. I do not know exactly. For me the path is not constant. I have burnouts at the beginning and end. Speed is ok. https://www.instagram.com/p/BL5zOHBASf9/?taken-by=polygontwist Feedrate-burn: F500 Feedrate-move: F800

; start v1.4 2016-09-26 ; 49.95 x 49.95mm² G90 ;absolute Position M08 ;Flood Coolant On G21 ;Set Units to Millimeters ; mm/Pixel 0.16 0.16 ; 150 dpi G1 X0 S0 F800 G1 Y-4.71 S0 F800 G1 X0 Y-2.71 S0 F800 M3 G1 X18.28 F800 S0 G1 X18.45 F500 S643 G1 X18.79 F500 S1000 G1 X18.96 F500 S643 M5 G1 X0 S0 F800 G1 Y-4.88 S0 F800 G1 X0 Y-2.88 S0 F800 ...

In grbl, there are still speed curves, perhaps it is because of it? I will exchange grbl against merlin firmware. I hope this will be better.

mkeyno commented 7 years ago

@polygontwist actually I build the cnc laser with modified Marlin and inkscape extension made by @TurnkeyTyranny , https://github.com/TurnkeyTyranny/buildlog-lasercutter-marlin https://github.com/TurnkeyTyranny/laser-gcode-exporter-inkscape-plugin the engraving speed was very high but it didn't maintained anymore but HakanBastedt port the repo on Due board and upgrade it and its shows very good result , I suggest to take look at

polygontwist commented 7 years ago

@mkeyno thanks for the links. I'll look at it. I had found the: https://github.com/CCHS-Melbourne/LaserCutter