Servo Controlled Blast Gate + AC sensor

https://youtu.be/kXWEuUqU3tQ

I printed gears and mount in ABS and it seems to work fine. I printed a second set with the gears made from armadillo filament. Time will tell if there is any real world difference.
Travel will cover a 4 inch blast gate and all three pieces will print on a single 200x200 bed.
For smaller gates, you can trim off the end of the geared rack.

You will probably want to lubricate the gears/slider mechanism.

For servos, you need something with some torque. I used these:
https://www.aliexpress.com/item/1-pieces-MG946R-upgrade-RC-Metal-Gear-Torque-Servo-For-Boat-CAR-13KG-Torque-Metal-Servo/32854187745.html?spm=a2g0s.9042311.0.0.3da24c4d3N29DO

I like them a lot.. metal gears and screw hole.. just mount the horn that matches the indentation on the wheel and use a longer bolt to mount it.

It's running powered off an arduino uno running from a 7 volt power supply. Don't try to power these servos from a 5 volt USB.

If you want these to automaticall