Hello!
I have this setup:
Ramps 1.4
V1 Marlin
CNCjs (V1Pi)
Is there a way to easily test different feed rates in CNCjs? If I set the feed rate too high or low from Fusion 360, I would like to change it on the run without having to create a new gcode.
If there is a easy way, maybe changing the gcode? …what feed rates is it that I would normally wanna test different settings for? Sorry for that weird question, but I’m still learning here 
/ Oskar
A M220 g-code sets the feedrate percentage, so it will scale the feedrates. Given your setup, I’m not sure if you could pause printing and send that code, or if you could only do it between g-code files.
You could probably just send it on the command line while it is running too. You might even set up a macro to push with 80% or 125% speed presets.
Interesting.
First goal would be to change between jobs. But doing it whilst running would be awesome.
Is this something you usually not tinkering with?
From https://cnc.js.org/docs/user-guide/ - the grbl widget provides Feed(rate), R(apids) and S(pindle) overrides.
I programmed feedrate into my pendant, and it can be used while a job is running. I just don’t know if other delivery pathways for g-code are as flexible. BTW: other than some tests to verify that it works, I’ve never used it.