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    Re: The task (lawn mower topic)

    Thinking the alternator in the image below with it's fan internal may keep
    cooler with 500+ cfm of air movement then the enclosed type I tried first.

    maybe.

    today the outside temps reached...
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    Re: The task (lawn mower topic)

    Crap, the alternator is at 85degf while mower is running, and batteries lasted 30min. ,
    that means alternator is cooked.
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    Re: The task (lawn mower topic)

    with the blower running the servo motors are operating about 30degf cooler.
  4. Replies
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    Re: The task (lawn mower topic)

    I may have found the issue with the alternator, it seems these are single wire devices,
    that self excite, but I wired the excite input to 24vdc when the engine is running.

    that could over ride...
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    Re: The task (lawn mower topic)

    Jwatte, I have room to mount a second blower on the other side, that would
    give me 540cfm of air on the alternator and woulds only cost 6amps of power at 24vdc.

    I don't know if the high heat is...
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    Re: The task (lawn mower topic)

    I should now be able to test to see if moving 270cfm of air across the alternator
    can control the temperature it operates at.

    7565

    7566

    7567
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    Re: The task (lawn mower topic)

    while I picked this task because I was thinking it would go fast(faster then most tasks I pick)(some last years).
    so I'd have time to finish the four wheel drive system on the mule before winter...
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    Re: The task (lawn mower topic)

    EdZachery, you are correct about it being heart of the mowing season, but now
    I'm dealing with the heat of the mowing season, as it turns out alternators get
    damn hot. I installed a temperature...
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    Re: The task (lawn mower topic)

    with the alternator installed and charging the batteries, this task is almost
    complete(just need to clean up wiring and make covers for the batteries) .

    7555

    7556

    7557

    7558
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    Making a mechanical gyro?

    I understand I could get a laser ring gyro for around $2000, but back in the 1970's
    I worked on a missile system in the army that used a analog mechanical gyro that
    was caged at a fixed angle when...
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    Re: The task (lawn mower topic)

    Jwatte , I do hope they work better then the two position switches I got from Amazon also,
    which failed (sometimes worked, sometimes not)
    hard to complain when you buy 5 for 12.00 and free...
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    Re: The task (lawn mower topic)

    this season's build is a little different.

    while driving around chicago I noticed people using stand up lawn mowers,
    to find out why, what's the benefit I could have stopped and asked, but that's...
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    Project Re: More Mule then Rover?

    the bucket also makes changing mower blades easier.

    7468

    7469
  14. Replies
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    Project Re: More Mule then Rover?

    I just looked up and noticed that it's march.
    time to turn attention to mowing, big build this season for dealing with grass.

    Lots of fun this winter! looking forwards to next winter.
    the bucket...
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    Project Re: More Mule then Rover?

    I'm also not happy with the bracket design when used with the bigger motors.

    these bigger motors have OEM mounting holes (6-M6 tapped holes), but I added
    (8) 10-32 tapped holes to be able used...
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    Project Re: More Mule then Rover?

    jwatte, the current motor bracket is made from 2pc .5" x 2.5" 6061 aluminium plate.
    the plates are bolted together by (4) 1/4-20 SHCS (grade 8) .
  17. Replies
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    Project Re: More Mule then Rover?

    7461

    the flexing of this aluminum bracket is due to
    the 6" distance between the mounting bolts and
    the chain sprocket.

    7462

    it could be minimized with a gusset added.
  18. Replies
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    Project Re: More Mule then Rover?

    With the bigger motor it's pointing up and is visible in the camera facing
    down on the bucket attachments.

    when I get back to Wisconsin Sunday I'll post video of it bouncing around

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

    I would like to try to make the lifting frame out of aluminum and 10" more travel

    but all the brackets out of steel

    breaking up ice on the streets is very hard work on the mules

    also it...
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    Project Re: More Mule then Rover?

    My concern is not some much that the bracket
    could fail, but that it could flex enough to let
    the chain jump a tooth.

    With a steel bracket the motor would stall before it jump a tooth.
  21. Replies
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    Project Re: More Mule then Rover?

    Can't win them all.

    the motor I planed to use for the tilting of the bucket use an inline 250Watt.
    7457

    and with it being only 250W I made it's brackets out of aluminum,
    but, the first motor...
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    Project Re: More Mule then Rover?

    the two outside batteries could quickly changed out.

    7441

    these type connectors should make the change over
    plug&play,some more.

    7442

    but they each weight about 100lb, so going to have...
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    Project Re: More Mule then Rover?

    jwatte, seems doable
  24. Replies
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    Project Re: More Mule then Rover?

    https://www.youtube.com/watch?v=fMdravj3FDA&feature=youtu.be
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    Project Re: More Mule then Rover?

    because I can limp along(get the job done).
    the next issue needing attention is charging.

    I have a few 24V chargers, 5 Amp, 7 Amp (but wanted 20 Amp).

    my price range at the time of the lift...
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    Project Re: More Mule then Rover?

    current camera setup

    7440

    the snow bank is made by the bucket
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    Project Re: More Mule then Rover?

    jwatte, it's too limited by the small front casters right now, but once the back half
    is complete(4 wheel drive)...then it's going to be something to behold.

    even with it's current limitation...
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    News/Announcement Re: Turtlebot3 with Openmanipulator

    looks like hours of entertainment
  29. Replies
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    Project Re: More Mule then Rover?

    because we have 6" snow coming in tonight I heated my
    home work space and made the power supply changes.

    removed Wifi router and cameras form the 110vac inverter.

    the only thing running on...
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    Project Re: More Mule then Rover?

    jwatte, that is correct.

    7438

    I got a few of these last year for that purpose, but the 110vac inverter was just too
    easy to implement (plug & play). I guess easy isn't always best(or...
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    Project Re: More Mule then Rover?

    I was wondering if I could tilt the bucket back enough to keep
    the snow in the bucket when lifting.

    7436

    7437

    but, not ideas are good ideas.
    I was thinking it would be nice to have all...
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    Project Re: More Mule then Rover?

    After playing with the bucket for a short time it became clear
    the switch idea isn't going to fly, too much time.

    so I added a few more push buttons to the remote controller.
    7433

    I like this...
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    Project Re: More Mule then Rover?

    I hope mother nature delivers some snow soon, I need to
    test with snow now.

    jwatte, I can only tilt back 10deg with the current bucket support arm.
    and because that arm is the weakest link(1/8"...
  34. Replies
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    Project Re: More Mule then Rover?

    plan B for dumping worked out good enough to play with some snow.(kinda fast)

    with the bucket dump all the way up, it's tilted back a small amount(to help keep snow in bucket when lifting)
    I...
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    Project Re: More Mule then Rover?

    now with limit switches installed, and the plan B arm completed
    the dump setup can be tested(sweet).

    7431

    7432
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    Project Re: More Mule then Rover?

    baby steps.
    7429

    7430
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    Project Re: More Mule then Rover?

    The way I first tested to do it the only way to adjust the chain tension was to
    shim the bucket support arm.
    7427

    and the motor brake had to hold all the weight that I put in
    the bucket.
    ...
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    Project Re: More Mule then Rover?

    jwatte, truth is, I'm not ready for snow.

    I'm going to try plan B for the dumping setup.
    I did get the new motor and tested the brake to insure
    it can hold the bucket up.

    heading back to...
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    Project Re: More Mule then Rover?

    https://www.youtube.com/watch?v=_qXii29on2g
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    Project Re: More Mule then Rover?

    I was able to test the dumping drive setup.
    the speed is manageable but, even with a 1" shaft because of
    the amount it's unsupported on each end it acts like a leaf spring(crap).

    7425
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