Add a remote control switch to a drill motor?

Question

I built a 'cow tracker' by running a 75' cable between a pulley and a hammer drill motor to basically suspend a 'cow' across my arena. It's used to teach my horse to rate a cow. It works fantastic, but I'd like to add a remote control to it so I can run it from on top of my horse. It just needs to start-stop and have variable speed. The drill motor works perfect for it, but I don't know anything about taking the trigger apart to wire a remote to it. I thought of using a garage door opener for the remote and receiver, but the drill cost me several hundred dollars and I don't want to wreck it. Any guidance would be great (I know nothing about electronics).

Answer 1

Another possibility is to use the garage door-opener as you planned. Do not take the drill trigger-switch apart, just MECHANICALLY couple the garage door-opener motor (gear-drive) to the drill's trigger switch, via a mechanical coupling like coat-hanger wire. The garage door-opener motor/gear-drive is reversible (both opening and closing the garage door), so you could remotely control both depressing and releasing the trigger switch.



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Answer 2

Almost all garage door remotes are designed to handle 32v or less. And MUCH less amperage than you are using. There are radios used for commercial doors but are becoming unusual as the old door openers wear out. You could use a 24 v coil contactor with a transformer in series with the #1 and #2 connections on the radio. A small ohm resistor might have to be added in the series before the coil. #1 and #3 on the radio require 24v to power the receiver. The contactor should be contiuous duty. The transformer should be similarly rated. If I was doing this I would power everything with a GFI protected outlet since this sounds like an outdoor thing. Maybe have an electrician check it besides. If you need variable speed devices are available OTC. Most brush type motors run better on DC, but be careful.

Answer 3

This is my opinion:



You would have to open the drill handle, and locate the two wires to the controller inside. One will go to the motor, and the other to the battery. Disconnect these wires (mark them so they can be reconnected properly) and extend them at least 12" from the drill.



Purchase a Radio Control system for an electric car or airplane from your local hobby shop. You'll need a REAL system - not one from a toy! The speed controller part of the system will have to handle the drill motor current.



The system will have connections for the propulsion battery (not part of the system) and the motor.

Following the directions that came with the RC system, connect the speed controller to the drill motor and battery. The Hobby Shop guys may be able to help if you have any problems with this.



Charge everything up and you should be good to go! One of the controls on the transmitter will adjust the drill speed to whatever you want. The transmitter ON-OFF switch will stop the motor and restart it at the preset speed if you want to do so.



If you have any problems, email me at '[e-mail]'.

Answer 4

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Answer 5

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