As you might have guessed, i’ve built a (small) 3-axis CNC machine. Main control is via a Arduino Uno R2. The spindle consists of a brushless motor, an ESC and a digispark. In the long run i’m aiming for automatic, true rpm control. Prerequisites: grbl controls the spindle via 2 signals: ENABLE and DIRECTION. Skipping [...]
To make a digispark boot into your app without the 5s bootup delay follow these instructions. If you need to (re)program the digispark, just shorten P5 to GND. I’m using a digispark as a speed controller for my grbl based cnc router. With the standard 5s boot delay, the ESC’s signal detection window was missed [...]
As a side-project I started to develop on the Arduino platform (more on the project-of-the-day later). First Steps Getting going on windows was easy: setting up Arduino 1.0.1, compiling and running the “blink” demo, changing the frequency etc … was straightforward. Then: i found grbl. Flashing the premade 0.8a firmware from grbl – instant success. [...]
