Hello.
I am testing Arduino1.8.5 to GRBL 1.1.g (Arduino NANO), I use 2 motors, by the IDE I put the code "G01 F180 X1600 Y800".
To stop the engines I code "!", To restart "~". I would like to use the real-time command (Overriding: Feed rate)
The commands are:
0x90: Set 100% of programmed rate.
0x91: Increase 10%
0x92: Decrease 10%
0x93: Increase 1%
0x94: Decrease 1%
But what coding I have to write in the Arduino IDE for these commands to be active.
Cordially.
Mark.
Hi Mark.
Whilst using the serial monitor in the IDE is do-able it is often better to use something else for "real time"
Once you have GRBL loaded up to the Arduino it is usually time to drop the IDE.
There are lots of choices out there but I like UGS myself as I can change things like speeds and feeds on the fly whilst a g-code program is running.
Hello, thank you for your answer.
I just saw that Arduino is limited to the first 127 characters of the ASCII code and the commands are greater, so it is not possible to use the commands in real time with the Arduino IDE.
Marc.
The Arduino hardware is not limited to the first 127 characters of the ASCII code. You best check your sources. Some software may not recognize all combinations but I use all 8 bits for 255 different characters. What you do in software controls what will be processed. Extended ASCII is A set of codes that extends the basic ASCII set. The basic ASCII set uses 7 bits for each character, giving it a total of 128 unique symbols. The extended ASCII character set uses 8 bits, which gives it an additional 128 characters. Of course it is very likely the device is not using ASCII
@gilshultz The post title says it all "GRBL"
Grbl expects commands in a set format as per "g-code"
It can accept a few commands outside the normal g-code but these are also limited in function and are usually in a hex format as per the OP's mention.
That is normally confined to standard characters and not extended sets.
~~To send a real time command to Grbl from serial monitor, send the ASCII character for the number. ~~
0x90 = Z
0x91 = [
~~0x92 = ~~
0x93 = ]
0x94 = ^
See the ASCII Table.
This post is all wrong as pointed out in the next post. I read from the wrong column. My apologies.
0x90 has the top bit set, so its clearly not 7-bit ASCII, let alone 'Z' or '[' (0x5A and 0x5B from memory)