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For Grbl v0.8, see the Wiki on configuring that version. The bit masks to set the stepper directions are a bit convoluted in that version and prior.
Hmm, I'm thinking that they figured out that it's not easy to port Marlin, Grbl, and everything else to the Zero (ARM chip). Their github site had...
I'm curious about this. Did they say what the micro controller is in the MegaPi?
Yes. Grbl will search for the limit switch for a distance of about 1.5 times the axes travel. If Grbl starts a homing cycle and does not stop...
Not sure about the pull-down resistor setup you have. Grbl, since v0.9, assumes the pin has its internal pull-up resistor enabled at all times....
Nope. There are a lot of challenging technical issues with trying to cram everything in to a woefully overstuffed 328p AVR. Going to a Mega...
Not a conflict of interest. I just forgot you asked. Hard to say which is the most stable these days, as they are all progressing and new bugs...
That is true. However, at the time it was written, the real-time control characters needed to be selected as typable characters. These were things...
Grbl will ignore comments, but there are a set of special characters that control the real-time features in Grbl. These are ~, !, @, ?, and...
By default, Grbl is setup for 3-axis homing and starts the homing process with the z-axis. If you haven't altered the config.h file to do only...
Grbl follows the LinuxCNC definition of arcs and checks for errors according to their specifications. So, if it doesn't work on Grbl, it shouldn't...
Combining all 3 axes to a single pin should work exactly the same. You'll need to add another homing cycle for the third axis, so it'll look...
It's most likely that you have one of your coordinate axes inverted. Make sure that your machine moves the correct direction when you command it...
This sounds like a grounding and electrical noise problem. Make sure to 'star ground' your stepper drivers and Arduino, if you can. Also, try...
That's an interesting problem. I recall writing Grbl's homing cycle to be able to combine multiple axes to a single pin, as a way to save...
Sorry about the late reply. Your problem is indeed unusual. Can you describe your wiring scheme, commands you are sending to Grbl, and your Grbl...
Nope. I've wired in similar Chinese stepper drivers into Grbl and it ran just fine. Inventables has these types of drivers in their X-Controller....
Yes! (Sort of) :) You can have Grbl only home two axes for 2-axis machines. In your case, just the x and y axes. To do this, you'll need to alter...
The first thing to do is make sure your machine coordinate system is correct. X+ moves in X+ and Y+ moves in Y+. Alter the direction invert...
bCNC is the only GUI with manual tool change that I know of at the moment. Grbl provides all of the tools to support tool changes, but doesn't...
