Tag Archives: A4988

My new gaups shield – part 2

If you missed part 1 please find it here.

My new shield is ready

Finally my stepper motor drivers arrived and I’m ready to move on. I’ve placed them in their sockets and have adjusted the drivers according to this procedure.

Arduino with GAUPS shield and stepper motor drivers.

Arduino with GAUPS shield and stepper motor drivers.

Unfortunately I’m not ready to go because my Kress 800 FME spindle is broken. 🙁

I suspect that the carbon brushes are worn out but I’ve returned it to the reseller so we shall see what happens…

Arduino project – box joint jig

My first real Arduino project

Let me introduce my latest project: An Arduino driven box joint jig for my table saw! I saw a video on YouTube where some guy showed a box joint jig driven by a stepper motor and I decided to make one myself.

I already build a hand driven box joint jig very much like this one made by Matthias Wandel (it works fine by the way), so I started to build the electronics using an Arduino One, a 16×2 LCD screen, a Pololu A4988 stepper motor driver shield, a rotary encoder (with a micro switch included), a 18.5 V power supply, a Nema 8 stepper motor (SY20STH30-0604A) and some smaller parts (resistors, an LED, a LM7805 regulator and a capacitor). The whole thing looks like this:

Electronics for my box jointer project

Electronics for my box jointer project

Here is the schematics for it (without the LM7805 regulator and the capacitor):

Schematics for my box jointer project

Schematics for my box jointer project

The rotary encoder is used for controlling the menu (the switch labeled S1 on the schematics is actually built in the rotary encoder). The switches S2 and S3 are used for resetting the jig and for moving the stepper motor forward.

Here’s the sketch (it may be subject to change or include bugs): BoxJoin