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    Project Re: More Mule then Rover?

    to set the height of the blade I had these welded on($25.00 sweet!)
    for small casters and a orange plow marker flag(should show up on camera).

    7424

    I'm going to one more shaft, 12 teeth and 45...
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    Project Re: More Mule then Rover?

    hope to test the dumping setup this week(waiting on motor with brake)

    7419
    7420
    7421
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    7423
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    Project Re: More Mule then Rover?

    Not sure about the plan A for dumping.

    the gear motor I plan to use has a 180rpm output, and the sprocket on the buckets
    only turns 90deg. to make it at least reasonable if things go sideways, I...
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    Project Re: More Mule then Rover?

    with all the effort & costs that went into making the lifting frame, I'm going
    to install a second prox switch on each end of travel, that shuts down drive
    and turns on the brake.

    or the...
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    Project Re: More Mule then Rover?

    smooth!


    https://youtu.be/ngi4qHbGw-M
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    Project Re: More Mule then Rover?

    jwatte, nothing gives that warm&fuzzy feeling like good visibility.

    While I couldn't use the ballscrews I have available for the lifting of the bucket(too slow, small pitch)
    they may work out...
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    Project Re: More Mule then Rover?

    baby steps.

    got the prox switches for the lift installed.

    7415

    also moved the bucket out 2" to give me room to mount the dump
    motor under the bucket support arm(so it doesn't block camera...
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    Project Re: More Mule then Rover?

    the lift works as envisioned, 5 sec. for full lift height, tested lifting 290lb, it lifted
    it with no measurable slow down.(Sweet!) the braking system worked perfect also.

    everything very...
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    Project Re: More Mule then Rover?

    plan A is to use one 1000W motor for lifting and one for dumping.

    plan B is to use two 1000W motors for lifting and one for dumping.

    7410

    7411

    7412
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    Project Re: More Mule then Rover?

    I should have the bucket mounted to the lift soon

    7406

    7407

    7408

    7409
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    Project Re: More Mule then Rover?

    Lucky for me I ordered a manufactured steel bucket(80lb) from Home Depot, if I made it,
    chances are it would weigh 300lb.(like the lifting frame I'm working on)

    there is lots of aluminium in the...
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    Project Re: More Mule then Rover?

    baby steps
    7380

    7381

    7402 7403

    I'm going to test lifting the bucket while still just bolted together, before I take it back
    to the welder. the bucket with dump motor and brackets is...
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    Project Re: More Mule then Rover?

    these passed the 24 hour heat test.
    7376

    they also have a 200A version with the same foot print.
    which I'll most likely use when both sabertooth 2x60's are in use.

    when I made the motor mount...
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    Project Re: More Mule then Rover?

    jwatte, if plan D fails I may just do something like that.

    plan D is to use the same thing I would use to enable a drive on a machine.
    I can get these with 24Vdc coils.
    7375
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    Project Re: More Mule then Rover?

    jwatte, I've never worked or played with a Teensy yet. sounds like a good
    way to spend a winter.(testing Teensy's,Pi's and Edison's)


    I'm also not going to be able the use the cheap plastic...
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    Project Re: More Mule then Rover?

    mother nature must be checking in on this topic, 20 miles south of me got 10" of snow this week.
    she dropped none on me.


    I was thinking of using 2 Arduino Nano's for controlling the mule, but I...
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    Project Re: More Mule then Rover?

    baby steps.

    7372

    7371

    I should have the remote controller done by time the lift is ready.

    when this mod. is complete there should be 3 sabertooth 2x60 speed controllers,
    and I found an...
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    Project Re: More Mule then Rover?

    tician, I agree, something like a RC snubber would add to the warm&fuzzy feeling.
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    Project Re: More Mule then Rover?

    jwatte, very good advice.

    I started using EATON solid state relays 15yrs ago for work, and over the years have found them to be
    very reliable, but not cheap @$36.00 for the 15A units, @$26.00 2A...
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    Project Re: More Mule then Rover?

    tician, my bad. I'm going to be running the load output contacts in series.
    that way if the contacts stick on one of relays the other can still drop the drive voltage
    in case of emergency.

    my...
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    Project Re: More Mule then Rover?

    baby steps.
    which sucks because we got 6" of snow on way.

    7362
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    Project Re: More Mule then Rover?

    two of these in series should give me a warm&fuzzy for a Drive enable relay(s).

    7361

    two of them should draw .400 Amps (coil listed as 60 ohm)
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    Project Re: More Mule then Rover?

    tician, too hot to touch, that was with no load.

    Just relay connected to 24vdc battery over night.
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    Project Re: More Mule then Rover?

    I was thinking of using this SPST 300A 24Vdc relay for the Drive enable relay.
    It was listed as continuous duty, but still gets very hot after prolonged use.
    and it draws .5amps

    7359

    this is...
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    Project Re: More Mule then Rover?

    jwatte, while the 80A relays are cheap, the solid state relays needed for the arduino to control them are not, and
    I don't have a lot of them in my parts bin. because I have the sabertooth already...
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    Project Re: More Mule then Rover?

    I only have a single axis motor drive sitting around(sabertooth 50), and
    I can't see a need to lift and dumping at the same time. so I got
    a 80A DPDT 24vdc relay to switch between motors(lift/dump)...
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    Project Re: More Mule then Rover?

    Jwatte, that's one of the things that makes the 1.5 hour drive(each way) to the office worth
    the drive, the Mill has a conversational control on it(very sweet!), a lathe, surface grinder,
    and Steel...
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    Project Re: More Mule then Rover?

    baby steps.

    7354

    7355
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    Project Re: More Mule then Rover?

    Baby steps.
    7350

    7351

    7352

    7353
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    Project Re: More Mule then Rover?

    lucky for me, I had someone else weld the frame for me.
    and it turned out very sweet!.
    (if I did it, even using cold rolled steel it would have been spaghetti.)

    7347

    plan A
    7348
    plan B
  31. Replies
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    Project Re: More Mule then Rover?

    While waiting on parts for the bucket build I should think about
    rebuilding the current handheld mule remote controller.

    It's in a very sad shape.

    7346
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    Project Re: More Mule then Rover?

    jwatte, they are Arduino Nano V3.1 boards

    https://www.mouser.com/ProductDetail/Gravitech/ARD-NANO30NP?qs=sGAEpiMZZMvq007EO%252bXAYdh8vxKmOPAO
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    Project Re: More Mule then Rover?

    the only time I've had Arduino's lock up on me are when
    I have serial port conflicts, so even with using 2 Arduinos(one is for safety checks)
    I'm going to use I2c 16bit DAC(0-5vdc) for controlling...
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    Project Re: More Mule then Rover?

    when I started the mule project for convenience I had two battery groups,
    12vdc and 24vdc with two different charging systems.

    the 12vdc for PC , cameras and lighting, and 24vdc for the motor...
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    Project Re: More Mule then Rover?

    jwatte, have to agree with you on that one, but it should be a very quiet lift.

    the motors I planed to use for the lift&dump systems were motors I had
    used a few years ago for an electric bike...
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    Project Re: More Mule then Rover?

    for the first try, I'm going with a #50 chain for the bucket lift and bucket dump drives systems.
    7341


    I'm going to have the frame welded together this week.

    baby steps.
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    Project Re: More Mule then Rover?

    jwatte, with the way the bucket was made I have to lift it 18" just to dump it.
    I'm thinking of lifting a total of 34".


    jwatte, this is where the overthinking come in...
    hydraulics would be a...
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    Project Re: More Mule then Rover?

    jwatte, I'm still scratching my head about what type drive to use to lift the bucket.
    I have a ballscrew from a bridgeport mill, but with a pitch of .200" and a motor with 180rpm
    it would take some...
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    Project Re: More Mule then Rover?

    7338
    It seems I'm the reason for the slow down.

    over thinking it.
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    Project Re: More Mule then Rover?

    7337

    Sucks to be me.
    they are talking about snow in the forecast, yet the snow bucket is still not installed.
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