Grizzly milling machine CNC-conversion, controlled by an ESP32-Wrover running MicroPython.
Wiring it up.
JPEG Image - 1.49 MB - 03/11/2018 at 22:53
The technique has already been explored over at buildlog.net blog and it looks really promising. I want to see if this will be a practical method for precision step pulse control in MicroPython. I'll write more about this once I've gotten MicroPython on the ESP32 Wrover to control these shiny new gecko drives.
A couple of days ago my grizzly 2hp spindle motor let out it's magic smoke. So now I'm waiting on delivery of a new 3 phase motor + variable frequency drive to power it. This will allow me to have better control of the spindle speed and I planned to upgrade eventually, however, I had hoped to avoid the cost until much later in the project.
While I'm waiting for the new motor + VFD, I plan to install the ballscrew for the table X-axis, which will replace the ACME screw, enabling smoother table movement with less friction and much less backlash than the crappy OEM lead screws.
I should have a decent amount of time to work on this project over the holiday as I have a week of vacation from work. I'll try to post another update next week.
I found a cad model of a very similar mill, the RF45, I believe that grizzly's mill is built on the same castings. You can check out the model which I have shared on the online cad app OnShape: RF45 Model