Is there a functional or performance difference between grbl on arduino boards and grbl-lpc

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(Jonas Concepcion) #1

Is there a functional or performance difference between grbl on arduino boards and grbl-lpc on smoothie boards for use in a K40+Laserweb?

(Ariel Yahni (UniKpty)) #2

I haven’t used grbl on smoothie but on arduino I havent had any issues

(Jim Fong) #3

Yes step pulse frequency. A arduino uno max step pulse is about 28khz or so. Grbl-lpc on the smoothie can do atleast 100khz. That’s the fastest I’ve ran it so far.

I do 400mm/sec raster scanning on a k40 with stock stepper motor and pulleys. This requires about 63khz step pulse rate. Much faster than a Uno can do.

Edit
Standard grbl on arduino uno is only 3axis. Grbl-Lpc has been modified for 4 axis. You can run X,Y, Z table, rotary all at the same time.

(Jonas Concepcion) #4

Okay cool. I’m going to give the Arduino-Mega a try. For me it is a bit easier in modifying the code and uploading.