Need Help with Reversible Motor

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Old 09-11-19, 10:28 AM
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Need Help with Reversible Motor

Hi,
I am building a motorized easel for large format paintings that do not exceed 100 lbs; average probably more like 50 lbs max. My rough 3D diagram does not show the motor or pullies, etc, but I hope you can get an idea of where these things would go. Motor mounts on the bottom. Cables will raise and lower the central panel via pulleys up top. I purchased a 2500 lb capacity winch motor from Amazon, but it looks like it can only operate via 12v battery; and the instructions also say it should not be used to lift things vertically. Can anyone advise me re: what kind of motor to buy and where to buy one? I only know basic electrical stuff, so please don't throw advanced technical specs at me.[img]data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7[/img] Any guidance would be much appreciated! Thank you
 
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Last edited by metrov; 09-11-19 at 11:06 AM. Reason: Added more info
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Old 09-11-19, 11:44 AM
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I would use a linear actuator. They are available in different stroke lengths and strengths. Everything is encased in one package so it could be a cleaner installation than a winch and cables. DC powered would probably be the easiest to work with. Depending on the size of the motor you might want to be battery powered or get a power supply.
 
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Old 09-11-19, 12:33 PM
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Wow, great idea. You've introduced me to a whole new concept. I will begin my research on Linear Actuators right away. Thanks very much!
 
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Old 09-11-19, 01:47 PM
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I've used many 12vdc linear actuators and they would be perfect for you.
Linear actuator video

You'll find many listed on amazon as well as ebay. Shop around as there are many discount distributors.
 
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Old 09-11-19, 03:10 PM
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Hey, that's an awesome video. Very grateful for the help here, especially in pointing me in the right direction on this project. I don't normally build this sort of thing, so I've been kind of feeling my way through it. Great to know I have a place to come to for help. Best wishes
 
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Old 09-12-19, 09:41 AM
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Pjmax, I have a revised diagram using a linear actuator. I also spoke with "Progressive Automations," who sells the actuators, and they advised me on the size and type of actuator I should get. But since you have a lot of experience with actuators, would you mind taking a look, and telling me if you think my design is sound? I'm getting this actuator: https://www.progressiveautomations.c...18277279662147 and this controller: https://www.progressiveautomations.c...818b1eb7&_ss=r Thanks very much
 
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Old 09-12-19, 11:19 AM
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Your link came up with a 30" actuator moving at .37"/second. That's a minute and a half to go from end to end... really slow. I don't think you'll want a speed controller to make it any slower. I would just run it on or off. You can always add the speed controller later if you want. If you want variable speed I would pick a faster actuator. Then you'll have "room" to slow it down.

Don't forget that you will also need a power supply.
 
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Old 09-12-19, 12:11 PM
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Good point. I will revisit the speed controller. And yes, I've got the power supply lined up. Progressive Automations doesn't have one with a 30" stroke that goes any faster.
 
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Old 09-12-19, 02:58 PM
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Speed...........:
0.37"/sec (150 lbs)
1.14"/sec (50 lbs)
2.00"/sec (35 lbs)


The speed is based on load. Your load should be very light.
A simple toggle switch is all that's needed to control it.
 
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Old 09-17-19, 08:06 PM
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You could find a used Chandelier lift to do this. It would be super quiet and would allow you to lower and raise the canvas easily. They come in varying specs, but a 100lb capacity chandelier lift sounds like a perfect match.
 
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Old 09-18-19, 07:03 AM
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Turns our Progressive Automations had a faster actuator after all. It was twice as expensive, but I ordered it, along with rocker switch and power supply. Hopefully it will all go together smoothly.
 
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