A new kind of digital Finger Joint Jig

[Christophe Mineau]

I made an automated box joint jig a few years ago.
https://wb8nbs.wordpress.com/2014/11...ig-lead-screw/

Hi,
Yes your project has lots of similarities, I see it is based on Mathias Wandel's jig.
His design is probably one of the best, but I never launched this build because it's simply too big ! And I already have a very good sliding carriage on my table saw,
so I wanted to take advantage of it and make something with lower foot print.
I also see that you powered up the lead screw with a car seat motor. This is certainly something that I would have also done if I used this kind of jig more often.
Actually, the motor (I think I would put a stepper, avoiding the need for the rotating encoder) needs power, so a cord, and it adds weight on the mobile part, so for me this is a big drawback.
In my case, a simple 9V battery is enough, and there is no wire, it keeps light weight.
I also deliberately didn't put any LCD display, in order to save power. In average, I only have ~one(+) LED lighted at a time.

As you say in preamble, the only annoying thing with the lead screw is to keep the count of rotations, even with a gear box like in Mathias's design.
This is the only point I addressed with my "tuner" box, I have no particular issue with turning the lead screw by hand, ( I am not that lazy :o) )

I take good notice about the Hall effect sensor that you used, causing no bouncing. This is a good point, because bouncing was my major problem with the IR optical sensors. I had to setup a software debouncing (polling), and could not use the interrupt mode.
On the other hand I have probably a higher resolution, but this is not really necessary.

On your side, do you detect the direction of rotation ?

Good build, wb8nbs. Keep on posting !