Officer needs help

[jojvl32]

I hope I am not intruding on your group but I need assistance with electrical motors. I am a firearms instructor and want to build a laterial moving target system. What kind of electric motor do I need that I could hook up to a pully? I want to be able to reverse direction and change the speed. To draw a picture--the motor would be mounted on a wall, on the opposite wall would be a pully. A cable with a target holder would run between the motor and the pully. Again I am sorry if this is the wrong place to post this question, but I know very little about motors. Thank-you all for any assistance.

 

[ozmosis]

Hey, I can send them with sandwiches packed...
Whatever you decide on for the solution, I'm sure the company would just love the publicity of a real "bullet-proof" product. You might even get one for free with an offer of unlimited publicity!

 

[applekor]

Here's another possibility:

1x High torque RC car motor
1x RC car gearbox (optional for lower speed and higher torque)
1x Pulley (custom fit to motor or gearbox shaft)
1x RC car proportional speed controller
1x RC car receiver/electronics box (might have speed controller onboard)
1x Inexpensive 2-ch proportional RC transmitter
1x Slightly modified 120VAC to 9-15 VDC (power supply (similar to a cell phone or radio charger)

With the exception of the pulley and the power supply all of the parts should be available at your local hobby shop or from a myriad of online shops. Just make sure that your speed controller is adequate for your motor choice. It might also be a little more inexpensive (not to mention easier) to buy a complete RC car kit and just use what you need out of it. The power supply can be bought from your local electronics or hardware store and the DC voltage and current should match the requirements of your electronics box, etc. Mounting is left to your imagination.

If the object is to simply move a paper target back and forth, it just might have the guts for it. Also, to go with the latest comments, the compact nature of the components limits unwanted target aspect.

Just a thought,

Mike

 

[stardelta]

I was once asked as a favour to come up with a cheap and simple way of `Automating` a curtain on a theatrical-stage at absolute minimum cost. In true `Junkyard-Wars fashion` (yes...we have it over the pond too)! Myself and a colleague came up with a solution using a DC motorgearbox, battery and control gear from a scrapped electric-wheelchair. We dumped the unwanted chair parts, fixed a 2nd-hand pulley on the ouptput shaft and wrapped the curtain cord around it, fixed the joystick and control gear onto a fabricated bracket then weighted the whole thing down to the stage-floor to keep the tension on the cord.
It worked perfectly on the opening night much to our surprize. Pushing the joystick forward opened the curtain, bringing it back closed it, all with the advantage of variable speed. I just phoned my friend to remind me what the whole thing cost, we spent about £25 on various bits and pieces etc but that was without the wheelchair parts which were donated...thats about $43.50 at todays rate. If you can get hold of an old chair I am sure with a bit of crafty thinking the idea can be adapted to power the target in the required manner. Simple, hard wearing, easy and cheap. Just remember to charge the battery overnight.

 

[itsmoked]

stardelta; nice idea. You even get the joystick in the deal. The speeds are right. Just pull the tire off a rim. Use the other tireless wheel elsewhere for the return pulley.

Sweet.

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com

 

[jraef]

Ingeniuos, bravo.

Didn't "Junyard Wars" originate from your side anyway?

Eng-Tips: Help for your job, not for your homework Read faq731-376

 

[stardelta]

I think it did, but over here its called `Scrapheap- Challenge`