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How to test Treadmill Motor

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  • Mike Nash
    replied
    Does anyone else think it would be tough to find a 5x20 mm 250V fuse over 20A? The motor can only suck 26 amps until the weak link fails and most US outlets are 20 amp at best with some 25 amp ones occasionally.

    The motor and controller wiring looks a little light for continuous duty at that rating too.

    Leave a comment:


  • Tundra Twin Track
    replied
    Thanks for all the replies,I hooked it up to 12 volt battery ran slow and works both directions

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  • mattthemuppet
    replied
    ditto what Mike said, looks like an electronic controlled controller (!). They typically require an external timed signal (from the panel in front of the jogger) to change output to the motor. You can hash up a signal with a 555 circuit or an arduino (there are a couple of great articles out there if you're interested), but I'm not so sure for that controller. You'd need more electronics chops than I have!

    Awesome looking motor, looks like a considerable step up from the "run" of the mill TM motor. As for HP ratings, alot of the TM motors I've seen have 2 ratings - the big number for peak load and a lower number (usually 60% or so of the big number) for continuous duty. Always stated for both at max speed, usually around 4000rpm. Using the smallest possible polyV pulley on the motor (1in for a J belt I think) and 3x-4x that on a countershaft can get that down to a usable number for a machine tool. Or leave it as is for a belt sander

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  • MaxHeadRoom
    replied
    Personally I like the Johnson T.M. motors, in spite of the name they are made in China.
    Here is what they say about H.P.
    https://www.johnsonfit.com/blog/trea..._of_horsepower
    Like most DC motors, they have maximum torque at zero rpm and are fairly flat up to the max RPM.
    https://www.google.ca/url?sa=t&rct=j...orhEeg&cad=rja
    Max.
    Last edited by MaxHeadRoom; 03-24-2017, 03:10 PM.

    Leave a comment:


  • J Tiers
    replied
    Originally posted by Mike Amick View Post
    ...

    As others have said, they are generous when they rate these motors. I wouldn't sketch on
    finding a controller that will handle 3hp. I wouldn't be afraid to use anything from 1hp up.
    The "generosity" is not what you'd think. In this case it works out to 780 watts input for 746 watts output, which might be a little high, but not too unreasonable. DC PM motors are fairly efficient.

    The real reason people squall about "tiny chinese horses" is that the folks totally fail to pay attention to the motor specs. Specifically the 4000 rpm.

    The motor has a certain torque capability. at the slow as molasses speeds that everyone wants to run the motor at, NO it is not 3HP. The best quality motor is of low HP when used slow. You won't get 200HP out of your car engine either, if you run it on kerosene, and hold it at idle speed. You want 3HP, you gotta run the treadmill motor at 4000 rpm just like it says. DONE.

    How you get the 4000 rpm down to your desired speed is your problem, YOU are the machine designer. You ignore the specs that are printed right on the label, and you can;t expect to get the results. Tough... sucks to be you, I guess.

    The motor will do pretty much what it says.

    Leave a comment:


  • Mike Amick
    replied
    well .. the dust has settled and you should know where you stand now.

    You can't use your controller, its digital control and just not worth the effort.

    The motor is a good one though . And your flywheel is keyed on, so it won't spin off
    by it self.

    As others have said, they are generous when they rate these motors. I wouldn't sketch on
    finding a controller that will handle 3hp. I wouldn't be afraid to use anything from 1hp up.

    Leave a comment:


  • Tundra Twin Track
    replied
    Here is more pics[IMG]http://i1371.photobucket.com/albums/ag292/tundratwintrack/image_zpsajnjsk1t.jpg[/IMG]

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  • mattthemuppet
    replied
    Originally posted by MaxHeadRoom View Post
    The problem with leaving the flywheel on is if you require rapid accel/decel no industrial CNC spindle uses a flywheel as far as I have ever seen.
    The reason it is used on a T.M. is to avoid any jerky motion and produce a smooth motion when a user is on the belt.
    Max.
    For sure, that's one of the downsides - threading to a shoulder without opening the half nuts (eg metric threads on an imperial lathe) or telling to a certain depth is really hard, but the upside is that the motor won't bog on interrupted cuts, which seems to affect Tm motors more than standard ac motors. I've done it both ways on my lathe ("1hp" motor) and the flywheel is definitely better. Each to their own though, not like there's a law about it

    Leave a comment:


  • MattiJ
    replied
    Originally posted by mattthemuppet View Post
    That's probably because the whole "buy equipment to get fit but never use it" craze never took off in Finland

    Shipping would be a killer though!
    Nah, What we have around here is ample of exercise bikes and cross trainers but those are useless for home shop machines
    (Unless you want huge 60 pound cast iron flywheel for your hit-and-miss model engine)

    Leave a comment:


  • RichR
    replied
    Originally posted by Mcgyver View Post
    Originally posted by mattthemuppet View Post
    That's probably because the whole "buy equipment to get fit but never use it" craze never took off in Finland
    an incredible marketing accomplishment.....like the cosmetics industry, what they are really selling is hope
    I remember many years ago seeing a very funny scene on TV where some fellow giving a tour of his house points to his treadmill and says:
    and this is my $5000 coat rack.

    Leave a comment:


  • MaxHeadRoom
    replied
    One quick source to test a motor is a automotive battery.
    The problem with leaving the flywheel on is if you require rapid accel/decel no industrial CNC spindle uses a flywheel as far as I have ever seen.
    The reason it is used on a T.M. is to avoid any jerky motion and produce a smooth motion when a user is on the belt.
    Max.

    Leave a comment:


  • Mcgyver
    replied
    Originally posted by mattthemuppet View Post
    That's probably because the whole "buy equipment to get fit but never use it" craze never took off in Finland
    an incredible marketing accomplishment.....like the cosmetics industry, what they are really selling is hope

    Leave a comment:


  • darryl
    replied
    Some of those motors are able to turn with just a few volts. That could be as low as 3 volts, or perhaps up to about 7 or 8 volts would be needed to maintain the armature in rotation, albeit at a very slow rpm. This is a good test as any deviations in rotational rpm would be quite noticeable, able to indicate whether there's a bad comm segment or an open winding, or even a shorted winding. The only real trick with a test like this is have a power supply can output enough current. A 9 v battery might be able to turn the armature over, but then again it might poop out before there's ever any rotation. I'd have to say that C cells would be up to it though. Three, four, maybe five in series should be more than capable of turning a treadmill motor under a no-load condition. Just for a test-

    Leave a comment:


  • mattthemuppet
    replied
    Hey Chris, I don't want to seem like a jerk, but that isn't an mcXX family controller as far as I can tell
    nor a kb drive. My guess would be a bespoke drive made for that manufacturer, especially given the onboard choke (although the mc2100 comes with that).

    Tundra - did you get a look at the control board of the Tm that this came from? That would give us a shot at figuring out how it's controlled. Or even a pic of all the connectors on the board.

    Leave a comment:


  • Mr Fixit
    replied
    Hi Tundra Twin Pak,

    Can you get a few pic's of the controller from the sides and top with the wires disconnected? This looks a bit like a MC 60. Controller in the one picture. I just took a all touch screen treadmill apart and it had a MC 60 with a 2hp motor and yes the 120v rack and pinion gearbox that raised and lowered the walking platform is strong and has a forward reverse motor.
    With the MC 60 controller you can clip 1 resister on the board and do not have to deal with stop start any more. Do read the post on here abouttreadmills for dummies, it's got good info no matter what your electrical experience is.
    Do let us know what and where you use this setup.

    TX
    Mr fixit for the family
    Chris

    Leave a comment:

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