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Steve. Please understand that machine coordinates don't do much of anything in reality. It's completely arbitrary once you learn how to use work...
A lot of questions. I'll try to answer most of them and make this clearer. If you search on the web, I've probably answered this question a few...
The back right would result in an all negative workspace. It's the standard origin and operation of most production CNC mills. This is the...
FYI, Grbl sets home/origin in the back right-top corner of the machine, rather than the front left-bottom corner that 3d printers do. One of the...
Rob: You're unfortunately right that Grbl's Wiki could use more work, and I haven't had the time (or motivation) to update it in a while. However,...
Yes.
Everything in Grbl's settings are in mm, steps, min, and sec. The units are given in the '$$' print out, next to the descriptions. The...
No, not at the moment. But for the most part, modern stepper drivers are very efficient in not producing a lot of excess heat. It's generally safe...
1 - Grbl automatically alarms upon power-up, if you have homing enabled. This is because Grbl does not know or guarantee its position. (This is...
Also, if Grbl is reporting the correct position, then it's doing its job, as position is directly tracked by the number of step pulses it...
When you move at a very low angle, the steppers have to pulse is in very non-uniform way. Grbl's stepper algorithm is based on a Bresenham line...
Gary: You're probably running into a resonance problem that is coupled with your CNC structure and stepper motors, which can happen if your CNC...
This is most likely a problem with your stepper acceleration and junction deviation '$' settings. These two parameters gauge how Grbl plans the...
FYI, this issue has been fixed in the most recent version of Grbl. When VARIABLE_SPINDLE is disabled, Grbl will ignore the S value and turn on the...
Both TinyG and Grbl are cartesian CNC controllers. Or rather, assume each axis is dynamically independent of each other. Forward and inverse...
Please use Grbl v0.9 over v0.8. It has numerous fixes, especially with performance and stability. The pin configuration changed slightly, where...
Yes. If it's an integrated motion control board, replacing the AVR would be non-trivial. If you are using a shield arrangement, or made your own,...
My mistake: EEPROM can be re-written 100,000, not 10,000. The 10k is the flash memory rewrite cycles. So, for your example, re-writing 27...
EEPROM can be rewritten 10,000 times, according to the AVR spec sheet. Realistically, users will never exceed this.
It's strictly 3-axis at the moment. Most people run 4 motors with two on the y-axis for gantry type CNCs. I'm working on a 4-axis extension with...
