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Corry, Glad it was helpful. I'm not the first to do this. I got the idea from some videos I found on the web. Just google gear hobber and you should find some. Here's one: https://thewikihow.com/video_ZhICrb0Tbn4 I tuned the parameters by starting with just P, then adding some I to allow it...

Yes, just set the NTEETH value in the code to how ever many teeth you want. If you want to go to a different pitch, you would need to make a new hob (the cutting tool). The hob I made is for 1/8" tooth pitch.

Very nice. Love the attention to detail. Electronic ignition, counterweighted crank, and the color of the wood base goes very well with the flywheel.

Flywheel weighs about 7 pounds. It was made from an offcut from the steel yard. I don't have a power hacksaw so I figured I'd just leave it at that size. Had to pull all sorts of tricks to fit it on my little lathe.

Yes, this was done without Mach4 or G-code. Below is a look inside the box. There is an Arduino Due clone and a motor driver (VNH5019 from pololu.com). I'm not sure if an Uno would be fast enough for this application. The orange/brown wires go to the motor position encoder. The green/blue wires...

Here's the hobber in operation:

I rolled my own. I'd post the program but I'm on vacation and don't have access to it. There's not much to it, mainly tuning the 3 coefficients.

Sure. There's a 2-bit opto-interruptor mounted on the mill motor frame and an interruptor disc with 18 notches mounted on the end of the motor shaft. The 2 bits feed the microcontroller, which is set up to count transitions. So the microcontroller knows how many notches have gone by and in which...

I thought some of you may be interested in this. I modified my milling machine to do gear hobbing. The goal is to turn the gear blank by exactly 1 tooth per revolution of the mill. To achieve this, I use a motor, shaft encoders on the mill motor and the gear blank motor, and an arduino running...

Thanks everyone. Nothing else in the works yet, maybe spend some time with the wife if she still recognizes me.

My first IC engine. A fat-flywheel Webster engine with a Fellows carb. Milled the gears myself using a homemade gear hob.