arcobaleno

In this folder you can find the gcode files used to product Arcobaleno with The Ant.

You can see the results of milling operations in this video:

[The Ant + Micropython = ARCOBALENO](https://youtu.be/vV_R-Mp-2kI)

There are some key points to keep in mind before using these gcode files:

	1) The spindle motor used during the milling was a 1500Kv brushless motor
	2) Some grbl parameters were changed before the milling operation
	3) Higher feed rates have been used instead of the suggested ones

[1] The default spindle motor was a 1000Kv one, in theory using a faster motor should allow higher feed rates but with a loss in torque.
We wanted to test it so we changed the spindle motor. The results are pretty good.
   
[2] To allow a faster milling procedures we changed some grbl parameters:

- $110=2000.000 (x max rate, mm/min)
- $111=2000.000 (y max rate, mm/min)
- $112=200.000 (z max rate, mm/min)
- $120=200.000 (x accel, mm/sec^2)
- $121=200.000 (y accel, mm/sec^2)
- $122=10.000 (z accel, mm/sec^2)

Keep in mind that we don't use the max feedrate during milling but only for fast travel movements.

[3] With a faster spindle motor we have tested higher feed rates.
This change only impacts the top.gcode and bottom.gcode files.
If you want to change the feedrate in these files, you can open them in an text editor and change all the occurence of 'F200' with 'F90' (the default value with a spindle motor with 1000Kv).
In this way you can use the gcode files with a slower spindle motor.

Have fun!