[Grbl_Esp32 Issue#411] Parameters 100-102 Not Showing Correct Values After Firmware Flash

#1 – reynolds087 于 2020-05-25

I have these lines in my example file:

#define DEFAULTXSTEPSPERMM 400.0
#define DEFAULTYSTEPSPERMM 400.0
#define DEFAULTZSTEPSPERMM 400.0

But after flashing the firmware it still shows 100 for $100, $101, and $102

#2 – MitchBradley 于 2020-05-25

Simply changing the defaults in the code and recompiling does not necessary change the values. The compiled-in defaults are only used if the checksum on the EEPROM settings area is invalid. Reloading the firmware does not necessarily invalidate the EEPROM. You can force it to be invalidated, and reset to the compiled defaults, by executing $RST

#3 – reynolds087 于 2020-05-25

Thanks; ok, I will keep that in mind going forward. Feel free to close the ticket.

#4 – reynolds087 于 2020-05-25

Sorry one other thing, when I run $RST into the terminal I get an error:3
Is there any syntax I am missing

#5 – MitchBradley 于 2020-05-25

Sorry I forgot to say “$RST=$”

#6 – MitchBradley 于 2020-05-25

If you want to RTFM, here it is https://github.com/gnea/grbl/wiki/Grbl-v1.1-Commands

#7 – reynolds087 于 2020-05-25

Thanks, much appreciated!

#8 – MitchBradley 于 2020-05-25

Search for STEPPERSDISABLEPIN in the files in the Machines/
subdirectory. Most of the boards use GPIO 13 as a shared disable pin. 
In the past, individual enables have not be used due to pin limitations,
but that will change with the new 6-axis I2S board, which has enough
output pins to allow each driver to have its own enable.

That said, stepper enable is not necessary for initial current setting
in most cases.  In the usual setups, the motor current is set with one
of the following methods:

* A small potentiometer on the driver module
* A set of jumpers next to the driver module
* Serial commands sent to a “smart” driver like a Triaminic

On 5/24/2020 5:06 PM, reynolds087 wrote:
>
> Something else I can’t find and I’ve been searching the wiki including
> this page:
> https://github.com/bdring/Grbl_Esp32/wiki/Setting-Up-the-I-O-Pins
>
> I can’t find the stepper enable pins. Isn’t that how I set up the
> holding current? For instance I set $1 to 255 so that the stepper will
> have current at all times, but nothing happens because I don’t have a
> wire from my driver to the step enable pin on the ESP32. Is there a
> default pin, and is there a |#define| command I can use to change my
> machine file?
>
> I’m sorry if this information is already available somewhere. I really
> did my best to search for it before asking.
>
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