search

usbcnc / grbl

This is a port of GRBL 1.1 to STM32F103 target
https://github.com/usbcnc/grbl/wiki
Other
206 stars 73 forks source link

What is the step rate of grbl STM32? #33

Closed radiolee closed 6 years ago

radiolee commented 6 years ago

We know grbl@arduino, pulse feq is about 30khz, what now upgrade to 32bit@72MHz?

usbcnc commented 6 years ago

I tried to 180KHz without issue.

radiolee commented 6 years ago

Thanks, this is great.

usbcnc commented 6 years ago

If you need higher rate, you can. 1 Over clock the CPU. Then you might not be able to use USB but you can use serial port.

  1. Use STM32F4 which runs at 168MHZ. So I assume the step rate can be easily go to 500KHz
radiolee commented 6 years ago

@usbcnc about 200kHz step rate is great for many stepper driver.