For all exact dimensions, check out the CAD models first and get familiar with the design of the whole thing.
|1||Mount the Aluminium profiles and the Base Plate|
|2|| Assemble the whole thing according to the CAD model
You need Screws M3, M5, M6, M8 various length
|- Y Axis first
- X Axis second
- Z Axis last
|3||Wire the Stepper motors and end-switches. I used 0.5mm^2 Litze wires for everything.||See images for more details.|
|4||Configure the Electronics and Software:
Connect the Raspberry PI and the CNC Hat
Stepper drivers get connected to the Raspberry CNC Hat. I did run the steppers with 32 Microsteps (DRV8825 Driver)
Clone the Y axis
Set the Jumpers correctly to clone the Y Axis and for 32 Microsteps
Setup GRBL with the correct Machine settings.
For power supply, I was using an old PC power supply. Here is a great tutorial, how to do it!
|I used NEMA 23 Stepper Motors with DRV8825 Stepper driver|
|5||Connect your Raspberry with a USB WIFI dongle to your network and copy your GCODE to the Raspberry. I Used HSMxPress in SolidWorks 2013 and EstlCAM Software to generate the .NC files containing the GCODE. Press start in bCNC!|
|I replaced the Pololu Driver DRV 8825 with more powerful external Drivers DQ542MA . Just replaced the DRV8825 with External Driver Sockets to connect the external drivers to the terminals on the CNC Hat from Protoneer.
Attention: By default, the stepper enable pin is high to disable and low to enable. The DQ542 needs the opposite, just invert the stepper enable pin by setting GRBL $4=1
| Made a new Z-Axis for more Stability.
Used Guided 16mm Linear Rails and some other stability improvements. Get the Models here: New Z-Axis