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Mill Motors

Discussion in 'AHB Sponsors Shop' started by motiondynamics, 22/5/10.

 

  1. DJ_L3ThAL

    Such rapp, very bass

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    Posted 7/8/17
    The shaft couplers in the last few pictures, where do you guys get those? I bought a pre-assembled mill and it is a direct rod from gearbox to mill which concerns me if something goes wrong. In fact I've already blown the speed controller up due to some hard grain which I still need to get my electronics on and try to repair.
     
    koolkuna likes this.
  2. hairydog

    Well-Known Member

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    Posted 7/8/17
    Try Fleabay.
     
  3. klangers

    Well-Known Member

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    Posted 7/8/17
    Shaft couplers are to absorb harmonic vibrations, not to absorb giant torque shocks btw.
     
  4. QldKev

    Brew Dude

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    Posted 7/8/17
    Use a shear pin
     
  5. DJ_L3ThAL

    Such rapp, very bass

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    Posted 7/8/17
    Thx, the motor and gearbox does roll around slightly when running and it loosened one of the brackets holding it into the wood. I imagine one of these couplers/shear pins will dampen some of that movement.
     
  6. DJ_L3ThAL

    Such rapp, very bass

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    Posted 7/8/17
    Anyone know the motion dynamics shaft diameter to suit? Looks like I'm looking for a spider coupler and then two shear pins to suit either side at whatever length I need to couple the gearbox and mill together?
     
  7. QldKev

    Brew Dude

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    Posted 7/8/17
    Motion dynamics supplies 12mm rod with their motor. The spider coupler will need to suit that on one side, and what ever mill size on the other. Since the coupler joins directly to the mill shaft there is no shear pin on that side. Where the rod goes through the mill is the only spot for the shear pin, all I've used is an old nail for it.
     
  8. kcurnow

    Brewnut

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    Posted 7/8/17
    The motion dynamics motor and gearbox assembly I have had a hollow shaft you put the drive rod through with a hole on one side of it for the sheer pin to go through. The sheer pin is the only thing transferring the torque from the mother to the drive shaft. It also needs to be sized appropriately so if you hit a rock in the grain it will actually sheer off. I just use a small cotter pin in mine.
     
  9. DJ_L3ThAL

    Such rapp, very bass

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    Posted 8/8/17
    Rightio, there is a dodgy looking nail on mine which must be performing the shear pin function. As for the coupler would it in fact compensate/dampen any slight alignment issue to stop the gearbox/motor 'wriggling' whilst in motion?
     
    QldKev likes this.
  10. nosco

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    Posted 8/8/17
    Mine isnt aligned properly and it seems to be working fine 18 months (?) down the track. Plus there is a fair bit of movement in the roller which means there is always a 3mm or so gap in the coupler. no matter how may times I push it together it always opens up.
    It will wear it out eventually I guess but no signs of wear so far.
     
  11. QldKev

    Brew Dude

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    Posted 8/8/17
    mines also not 100% perfect alignment. many years later still doing its job
     
  12. husky

    hop addict

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    Posted 18/11/17
    Anyone ordered one of these lately? I had a look on their site to add to the new MM mill from the BB but site says no stock. Looking for a sensing version w/o the shaft.
     
    Engibeer likes this.
  13. Engibeer

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    Posted 18/11/17
    It's said "no stock" for at least two months. I needed the wiring diagram a couple of months ago so I was on the site then. Would be worthwhile giving them a bell.
     
  14. Tony121

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    Posted 18/11/17
    I called a few weeks ago and they said they would expect stock to be available after Christmas
     
  15. peteru

    Here, taste this!

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    Posted 18/11/17
    That's a bummer for them. By then most of the BB crowd would have hacked together something else so that they can use their new MM.
     
  16. Tony121

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    Posted 18/11/17
    Things may have changed since I rang so might be worth getting in touch. I have since sourced an alternate.
     
  17. Beats_MC

    Member

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    Posted 19/11/17
    Quick question about wiring the motion dynamics mill motor: does cable size matter much? If I use wires that I've removed from an old extension lead will there be any detrimental effects? If so - can someone please recommend wire size.

    Thanks
     
    Last edited: 19/11/17
  18. malt junkie

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    Posted 19/11/17
    If your talking about the main power feed, then yes size does matter ( and any honest woman will tell you the same, yer can't whip cream with a tooth pick) any way Main power lines I would be using nothing less than 6mm square (super and sub fonts I just can't find since the upgrade).

    MJ
     
  19. Beats_MC

    Member

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    Posted 19/11/17
    I should have been more specific.
    Using a 12V 30A power supply. My query was regarding wire sizing on the 12V side. Any significant issues using 6mm2 cable on the 12V circuit?
     
  20. malt junkie

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    Posted 19/11/17
    Thats what I ran for several car bits and pieces when I added lights, winch, fridge etc. And I did mean DC side(12v) as it is high current @ 30amps.
     

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