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Antenna Rotator Project Update 2 (short)

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Looks like the final (electronic) design works so now it's down to the physical tasks of building the internal enclosure and figuring out how to hook the motor to the loop. I noticed that the heatsink on the stepper driver was quite hot after using it for a while so I may have to keep an eye on that. The driver can deliver up to 4amps per phase and the motor can take 6amps.

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24 авг 2024

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Комментарии : 23

@barryg41 5 лет назад

Nice BIG stepper you got there John! Lol

@Zone1242 5 лет назад

Yes indeed - probably overkill but better safe than sorry :-) Cheers, John

@RestoreOldRadios 5 лет назад

John, looks really good. I like your big stepper motor. I built a “light” version (attic installation) using Arduino as my controller and smaller stepper motor and another one with a Servo that rotates 180 degrees for the loop I recently built. I experienced significant EMI from both devices when in use and never got back to looking for a solution. I would be curious to know if you have any EMI from your setup; of course, I was only focused on the BC band when I tested it from 540 to 1700 kc. I’m looking forward to your next publish. Best, Don

@Zone1242 5 лет назад

Thanks Don, I'll be on the look-out for EMI once I get it done. I've decided to keep the rotator separate from the SDR so hopefully that will help. I suspect the stepper is overkill but I wanted the brake facility and this was the easiest way to implement it. My main reason for implementing this is also for the BC band. There is almost no AM broadcasts here anymore and I need all the help I can get to pull them in from places like UK (over 800km away). Cheers, John

@user-ol8yj5xp4m Год назад

@@Zone1242 Hello, cool project, I would like to try to repeat, can you share the materials, the code?

@Zone1242 Год назад

@@user-ol8yj5xp4m Hi, this was a simple design - no code involved. A rotary encoder hooked up to a stepper driver module via some circuitry to detect direction, etc. I made a drawing for another subscriber so I'll see if I can find it and if yes I'll post a link.

@Zone1242 Год назад

@@user-ol8yj5xp4m My share seems to be down for the moment so if you send me an email (address in the about section of the channel) I'll send you the pdf.

@joernone 5 лет назад

John, I knew you could do it, my friend,...whatever it was you did. LOL Regards, John

@Zone1242 5 лет назад

That's the sort of confidence I like to see! I was not at all sure - until I got there. Cheers, John

@Aleziss 2 года назад

I wish I could find a way to replace the AC motors in my Yaesu G5500 to have such precision control ontop of being able to have soft start/stop to put less stress on the antenna structure...

@Zone1242 2 года назад

I'm not familiar with the Yaesu unit but the system I've put together is made up of standard components - dc power supply, rotary encoder, stepper motor driver, and stepper motor. The challenge is how to fit them in the existing enclosure. From what I've seen of the G5500 you would need a second motor, driver, and rotary encoder. Also, your existing system includes position feedback so you'd have to figure out hope to replicate that as well. This was not part of the scope for my project.

@andresalisuagiii3482 4 года назад

Hi, great project you have there. I was hoping you can share the diagram or components used please. I'm planning to build one for my antenna. Thank you!

@Zone1242 4 года назад

I'll confess I was designng this as I went along. I'll have a look and see if I've got anything useful to share.

@osirus126 Год назад

What stepper motor did you use? I'm looking to get one. Please let me know what the model number is and I'd like to follow your lead here and build one myself