How to enable Air Assist for the cut layer

[Willy2406]

I'm using Visicut a lot, that is an awsome piece of software !
The laser engraver/cutter i use is a mofied SOVOL SO-2 driven by Octoprint with the betterGRBL plugin enabled, on a Rpi.
My svgs are made with inkscape and have 4 layers : raster engraving, vector engravng, inner cut, and outer cut. Everything is set up and behave wonderfully.

My problem :
I'd like to turn on the Air Assist only when the laser cuts the material. I can turn on Air assist with the OCTO8 custom gcode, and turn it off with OCTO9.

Would anybody have a solution for me ?

[t-oster]

Hi,
currently the GenericGCodeDriver only supports custom G-Code before and after a complete job.
You could all your Lasercutter twice, once with the OCTO8 and OCTO9 commands and once without and then send the cut job seperately to the one with those commands.

If you have some time, you could edit the driver. Since vector engraving and vector cutting are the same thing for the lasercutter, the point to add it for your use case would be the LaserProperty (the things needed per profile). Currently the GenericGcodeDriver uses the FloatPowerSpeedFocusProperty and you would need a derived class CustomGcodeFloatPowerSpeedFocusProperty ;). This would add the fields preGcode and postGcode, which could then be configured per laser profile (cut, engrave etc). In short you would need to

• Create a CustomGcodeFloatPowerSpeedFocusProperty which extends FloatPowerSpeedFocusProperty with the fields preGcode and postGcode
• Change the GenericGcodeDriver to use this instead of FloatPowerSpeedFocusProperty https://github.com/t-oster/LibLaserCut/blob/ebe72ea3af3b2ab52d797d8100c635f68722100e/src/main/java/de/thomas_oster/liblasercut/drivers/GenericGcodeDriver.java#L458
• Add outputting the codes https://github.com/t-oster/LibLaserCut/blob/ebe72ea3af3b2ab52d797d8100c635f68722100e/src/main/java/de/thomas_oster/liblasercut/drivers/GenericGcodeDriver.java#L501 and https://github.com/t-oster/LibLaserCut/blob/ebe72ea3af3b2ab52d797d8100c635f68722100e/src/main/java/de/thomas_oster/liblasercut/drivers/GenericGcodeDriver.java#L997

[Willy2406]

This is such a documented answer ! I'll try that ASAP, thanks a lot