GRBL v1.1 Machine Control and GCODE sender Plugin

[Beermkr]

I have this up and running. I like it a lot but noticed that if I create the drawing and then generate code the visulizer shows the drawing but not if I just open the gcode file directly. Any chance that there is a way generate the drawing when you run?

[karst.drenth]

Hi,

Yes, you can open the GCODE file from the CamBam File-Menu. (instead of directly in GRBL Machine)

CamBam will then display the drawing, and GRBL Machine will inherit the filename.

Greets,

Karst

[Beermkr]

Brilliant! Loving this plugin. Finally an almost all in one software/hardware control package!

[Beermkr]

Okay,

When I run a job the machine goes to a spot and stops for a tool change. When I click "ok" it goes back to 0,0,0. Problem is that there is a piece of stock at that position now. Is this something that is hard-coded in the post processor? Is there a way to edit the post so it does not do that  or even better have it home the machine (I use the far extents for homing and touch-off) so that would be perfect after a tool change.

[lloydsp]

Both 'home' and the tool-change position are programmable in the post.  'Simple changes, too!

Lloyd

[Beermkr]

Both 'home' and the tool-change position are programmable in the post.  'Simple changes, too!

Lloyd

Simple you say! Can you point a brother at a starting point?

[bartekdko]

hi

i would like to add compensation G41 G42 then just change in code to G40 with G41/G42 toolpath.

unfortunatelly i have Grbl which doesnt support compensation.

do you know what command i have to add to "cutter comp right" , "cutter com left" to create proper code?

thank you

[lloydsp]

Beermkr (BTW a man after my own heart!),

Give me the link to the PP you're using, and I'll take a look at it.  I'm too busy (or lazy) to search for it myself.

Lloyd

[dh42]

Hello

GRBL do not handle cutter comp, so I assume it's not possible to do ?

https://github.com/gnea/grbl

I think that in this case, the only way is to use compensated toolpath done by CB.

++
David

[bartekdko]

Yep its a shame :]

anyway i can see that mach3 postrocessor use G40 for 3D profile so i have the same parameteres in grbl post.
same about poly , we can use offset so thats the good news :]

hope they will add g41,42   and g81-83 soon

thanks for reply

[Garyhlucas]

I don’t think G41, G42 will appear anytime soon. I used to program by hand and used G41, G42 in virtually every program. CNC hasn’t changed a lot in 40 years. The game changer is CAM that writes code 100 times faster than the best hand programmer in many cases. So I haven’t used G41,G42 since using CamBam.  Its also strictly 2D so it is getting less and less important all the time.

[dh42]

Hello

So I haven’t used G41,G42 since using CamBam.  Its also strictly 2D so it is getting less and less important all the time.

same for me ; I've CB installed on the PC that drive the machine so when I need to tweak a profile cut to a precise value, I use the "roughing clearance" and generate the GCode only for the concerned mop.

++
David

[onekk]

I don't think that the G41 and G42 are added to GRBL, at least not for the 8bit machines, the code is complex and many calculations are involved, and the little 8bit processor is too slow for doing that.

For the future versions, maybe, but as the CAM software nowadays do the calculations for you it's not a "killer features".

I had a talk about it some time ago with chamnit (the GRBL main developer) and i think that the most wanted functions to be added to grbl are:

- Canned cycles
- Tool Change
- maybe hard buttons on the grbl "pcb" to do jogging but not with the Arduino Uno as the pin count is all used.

Regards

Carlo D.

[Garyhlucas]

Yes,  canned cycles would rank WAY higher than G41/42 in usefulness. Best canned cycle I have ever seen was on old Bandit controller. Crude control, no display screen just led digital readouts for numbers and lights indicating G, M, T and H as I recall.

The mill/bore cycle was killer. Started at center or a distance from center. and SPIRALED outward to the perimeter and then arced back to center. Constant tool load the whole time and you could even do under cuts or internal ring grooves because of the way it exits.

[Beermkr]

Beermkr (BTW a man after my own heart!),

Give me the link to the PP you're using, and I'll take a look at it.  I'm too busy (or lazy) to search for it myself.

Lloyd