LaserBot Set Units to Inches/MM

I've got a laserBot and I'm trying to get my CAM software to work with it.

In my Visual Studio debugger, I see that G20 and G21 are not recognized by the laserBot MegaPi Marlin firmware. I can't google anywhere and find what g-code words they are using for these two settings?

Thanks for any help!

... AFAIK "G20" will only set inches and "G21" millimeters as coordinates base.

As most firmwares use millimeters, you can remove them ...

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

My CAM software needs to support Inches. I've since found out that laserBot/MegaPi/Marlin firmware is always defaulted to MM and if I want inches, I have to do the conversion from inches to mm in code. I find that hard to believe since Marlin, by default, does support G20 and G21 g-code words. I guess laserBot is designed to never work in inches. That just amazes me.

... I'm using Marlin4Due and no functions for G20/G21 found ... so only meant for MM.

But my CAM (a modified Pronterface variant) has different import filters/plugins for common CNC-formats, which I've programmed together with my wife ... so no problem to add metric/imperial conversions by need

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Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

I've compiled Marlin 1.1.0 RC-8 with the 'flipped Axis' branch.

With this version I've tested that G90/G91 and G20/G21 work OK.

The current problem I'm having is that I can only send single line g-code commands to the laserBot machine. If I try to send the following, only the first line executes:

G91
G21
G01 X0000.0000 Y0005.0000 Z0000.0000 F3400
M4 P128
G02 X0005.0000 Y0005.0000 I0005.0000 J0000.0000 F850
G02 X0005.0000 Y-0005.0000 I0000.0000 J-0005.0000 F850
G02 X-0005.0000 Y-0005.0000 I-0005.0000 J0000.0000 F850
G02 X-0005.0000 Y0005.0000 I0000.0000 J0005.0000 F850 ( pass 1 )
M4 P0
G01 X0012.0000 Y-0005.0000 Z0000.0000 F3400
M30

Resolved!

I flashed Marlin 1.1.0 RC-8 and now my BenCutLaser CAM software is working with the laserBot...!!!

G20/G21 and G90/G91 and Arcs and Circles are working fine.