Newbe at 71

[mklotz]

Don't overlook Amazon as a source, e.g...

This one has many available input voltage and output speed options...

https://www.amazon.com/uxcell-50RPM-...c%2Bmotor&th=1

as does this one...

https://www.amazon.com/uxcell-Reduct...words=dc+motor

With the gear sets required for these kinds of speed reduction, even these small motors should be plenty powerful for your application.

Also, DC operation is ideal for field use. A rechargeable 12 volt SLA (Sealed Lead Acid) battery is compact and can probably drive one of these motors for hours.

[Britannicus]

Thanks Jon, As a great grandfather and a air rifle enthusiast I am working on some moving targets for indoor and out door recreation. I have built a couple already but my main problem is finding motors slow enough ( 1 to 3 rpm) and with enough power.

Hi Big Mike - I play continually with robots of varying sizes and shapes - what constitutes "enough power!" - I'd recommend for relatively low torque that steppers are easily available, cheap and extremely versatile as control is supplied by a driver and a controller - I'd heartily recommend Arduino and a single chip driver - both available for around $5 I'd guess on ebay.

Higher torque solutions - I've used a range of standard motors but these can be radically stepped down using cheap gear boxes - ebay can do them again for around $5 - you might want to include an H-Bridge for easy forward / reverse.

For a power supply - check out cheap Li-Po batteries - best power to weight ratio you can get

[aalv2003]

Ebay, flea or garage sale or the old broken aunt oven.

[jjr2001]

Ebay, flea or garage sale or the old broken aunt oven.

Thanks, I guess its\'s the bay again.

Cheers, JR

[Big Mike71]

Great ideas here and I have bookmarked all the links. I have a short video of the rotating tree stand on my Dropbox but not sure if I am allowed to post a link on here or not. Never done a You Tube so not sure about that. I will see if I can find a couple snapshots. If the Dropbox is OK please let me know.

[Big Mike71]

Took this off of video. This stand rotates a little over one rpm and is perfect speed. The tree rotator is rated for 100 lbs. It can be reversed by turning off and back on quickly. At $27 it makes a simple set up. I may try mounting one horizontal and place a gear on it pinned in position with a bearing to keep stress off the motor.

[Hans Pearson]

Thanks a bunch, I will be checking those sites out for sure. I also plan on checking out electric 12 volt window motors from car doors. They would have enough power and the rpm may be close to what I am looking for.

The trouble with window motor motors is that they have a very low duty cycle and will get pretty hot to cooking if used too long. Probably the best alternative is a wiper motor. These have a pretty good torque in the normal direction of rotation and will work almost as well in reverse. They are inclined to draw around 4 amps while running.

[jjr2001]

Hey Big Mike, that is a nice rotating target. Lots of targets. Looks like great fun. Looks like I may have another project to build. My son's gun club has the ability to setup your own targets and this is perfect. My range, Ben Avery, is for paper targets or you can go to the iron silhouette range.

I don't know why Drop Box would be any different than YouTube or any other video hosting server but that is just my take on it, not official.

Cheers, JR

[Big Mike71]

Try this and see if you can watch the video. This was made for BB gun but using heavier target would work well for pellet rifles would be OK. Steel plates would be best for 22 or larger. There are plastic dinosaurs, crackers, balloons and since this was made I have added some 4 inch tall plastic toy soldiers for targets. It is pretty versatile. The table is a 30 inch dia. , a 24 inch dia. and a 18 inch dia. plywood circles. I used 3 inch pvc for risers between the platforms. I wrapped the pipe with 3 or 4 layers of canvas and then 2 layers of camo burlap to prevent bullets from bouncing back or breaking the pipe.

https://www.dropbox.com/s/hxm3wn53ms...04.23.mp4?dl=0

[jjr2001]

Works fine for me Big Mike. Looks like a windy day.