Merge branch 'main' of github.com:bbaudry/swart-studio

penplotting/README.md

@@ -7,7 +7,6 @@ We have a pen plotter UUNA TEK ([uunatek.com](https://uunatek.com/)), iDraw 2 A3
 The pen plotter is connected to the Linux machine via USB, with a serial protocol.
 The pen plotter motherboard is called DrawCore, the firmware is based on [grbl](https://github.com/grbl/grbl).
 It uses a language called [g-code](https://en.wikipedia.org/wiki/G-code).
-The spec of the gcode language is documented at <https://github.com/gnea/grbl/blob/master/doc/markdown/commands.md>
 The X-axis is the sort side, Y-axis the long side.
 
 ## Configuration
@@ -35,15 +34,15 @@ Grbl 1.1h DrawCore V2.09 ['$' for help]
 
 ### GCODE cheat sheet
 
-* `G21`  Set Units to  millimeter
-* `G20`  Set Units to Inches
-* `F50` super slow, `F2500` maximum, super fast, speed only for `G01` (not for `G00`)
+* `G21`  Set Units to  millimeter (`G20`  Set Units to Inches)
+* `G17` Set Plane Selection to XY, Circular motion with the operator looking down on the XY table from above. [ref](https://www.haascnc.com/service/codes-settings.type=gcode.machine=mill.value=G19.html)
+* `F50` super slow, `F2500` maximum, super fast, speed applies only for `G01` (not for `G00`)
 * `G90` Set to absolute coordinate mode
-* `G91` Set to relative coordinate mode (from its where now)
+* `G91` Set to relative coordinate mode (from where it is now)
 * `G92 X0Y0Z0` save the current location of the head as (0,0,0)
 * `G02/G03` instructs the CNC machine to move along a Circular Arc from its current position to a new coordinate. The new coordinate can be absolute or relative, depending on the effective mode (G90 or G91). In G02, the movement will be in a clockwise (CW) direction. in G03 the movement will ve in counter-clockwise (CCW). ([source](https://www.machiningdoctor.com/gcodes/g2-3-circular/))
   * Version 1 – “R” Syntax: `G02/G03 X12.5 Y14.7 R2.0`; X, Y – The target coordinates at the end of the movement. R – The arc’s radius.
-  * Version 2 – “Ijk” Syntax: `G02/G03 X12.5 Y14.7 I1.0 J2.0 F0.2`; X, Y – The target coordinates at the end of the movement. I, J – The arc’s center point relative to X, Y.
+  * Version 2 – “Ijk” Syntax: `G02/G03 X12.5 Y14.7 I1.0 J2.0`; X, Y – The target coordinates at the end of the movement. I, J – The arc’s center point relative to X, Y.
 * precision: hundredth of millimeter
 `G00 X0.1 Y0.1`, `G00 X0.01 Y0.01`
 
@@ -120,15 +119,23 @@ turtle LOGO as high level API to generate gcode (not yet tried):
 * <https://github.com/Hand-and-Machine/extruder-turtle-Rhino>
 
 
+### With laser
 
+* `M2` Program End, turn off laser and stops the machine.
+* `M3` In Laser mode sets Constant power, eg `M3 S1000`
+* `M4` In Laser Mode sets Dynamic power.
+* `M5` Stop the laser
+* `S` Set Laser Power, maybe `S10`
+
+Ref: <https://www.sainsmart.com/blogs/news/grbl-v1-1-quick-reference>
 
 ##  Tools 
 
 ### SVG to Gcode
 
 **vpype** works out-of-the-box to do two things:
 - post-process and optimize SVG files, see doc
-- generate Gcode with vpype-gcode `vpype read input.svg gwrite --profile gcode output.gcode` [doc](https://pypi.org/project/vpype-gcode/)
+- generate Gcode with vpype-gcode `vpype --config vpype-flavor.toml read input.svg gwrite --profile idrawv2 output.gcode` [doc](https://pypi.org/project/vpype-gcode/)
 
 **juicy-gcode** works to transform SVG to gcode
  `./juicy-gcode ~/input.svg -f flavor.txt`

penplotting/vpype-flavor.toml

@@ -0,0 +1,32 @@
+[gwrite.idrawv2]
+unit = "mm"
+document_start = """(document_start)
+G21 ; Set Units to Millimeters
+G17 ; Set Plane Selection to XY
+G90 ; Set Absolute Positioning
+F5000  ; Set Speed to 2500 mm/min
+G00 Z0 ; pen up
+G00 X0 Y0 ; go to 0,0
+"""
+layer_start = """(Start Layer)
+"""
+line_start = """(line_start)
+; nothing we'll pendown after segment first
+""""
+line_end = """(line_end)
+G00 Z0
+"""
+#a line is composed of segments
+#segment_first is the command for the first line of a line
+segment_first = """(segment_first)
+G00 Z0
+G0 X{x:.4f}f Y{y:.4f}
+G00 Z5
+"""
+segment = """(segment)
+G01 X{x:.4f} Y{y:.4f}
+"""
+document_end = """(document_end)
+G00 X0.0000 Y0.0000
+"""
+invert_y = true