Servicing the 6kW Proven on Scoraig

K1

The plywood blades took some scrapes when the covers came off.

They could maybe do with a touch up next time I take it down. Made in Scoraig, these blades were the only type used in the Proven 6kW for many years until the new plastic ones appeared quite recently.

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20 Responses to K1

  1. Paul Camilli says:

    Morning Hugh,

    how are you finding spares these days for the old Proven?? Can you buy direct or do you still have to go through a ‘reseller’ ? Was going to take mine down and give it a good ‘once over’ as soon as the ‘Powerspout’ is online, which hopefully won’t be long http://lifeattheendoftheroad.wordpress.com/2012/03/01/good-day-bad-day/ the footings are in for the inverter shed 🙂 And by the way, I think that’s the ‘Stream Engine’ coming up for two years trouble free service, well apart from a burst hose yesterday, which incidentally is the same hose as this http://scoraigwind.co.uk/2011/11/paul-on-raasay-gets-his-powerspout-spinning/ 🙁 Cheap Chinese rubbish 🙂

    Keep up the good work, Paul

    • admin says:

      Hi Paul,

      I bought the yaw rollers directly from Kingspan Wind. The washers for the spring ends are here http://uk.rs-online.com/web/p/products/0280543/ The bushes are nylon pneumatic hose pipe and I have a stock so I will send you some.

      I don’t know if Kingspan Wind sell to everybody but I expect so. They are a bit slow to respond or they could have sold me everything.

      Good to see your shed foundations happening.

      cheers

      Hugh

  2. Paul Camilli says:

    Cheers for the washer link Hugh,

    no need to send the air pipe, ‘great minds think alike’ it’s exactly what I use and I’ve got plenty 🙂

    Cheers, Paul

  3. Colm says:

    Hi Hugh,

    Great blog, I’ve just found it, I’ll be taking my Proven 6 down in the next for weeks, What is the spec of the nylon pneumatic hose pipe, diameter etc, I think I will need to get some spares in before I get it down.

    Thanks

    Colm

  4. Colm says:

    Thanks Hugh

  5. Colm says:

    Hi again,

    I took my 6KW Proven down yesterday to Service, most of the washers had worn away so I replaced those, also the inner pipe was worn through so it was replaced also thanks to your advice.

    I also noticed one of the slip ring was showing signs of corrosion and this is causing one of the brushes to wear down, do you know if these brushes can be replaced separately, also have you any idea how to replace the corrode slip ring?

    Thanks a lot for your help

    sliprings
    second photo

    • admin says:

      The marks are from arcing and sparking. I’d recommend putting it on a lathe. You need a very smooth finish, and the marks of sandpaper show much too coarse sanding. Very round and very smooth. It’s often best to leave sliprings alone but this one needs doing. finish it with the finest sandpaper you can find and clean it carefully to remvoe all sand.

  6. Colm says:

    Thanks for the reply Hugh, I had been advised by my installer to clean off the dark marks with emery paper and that’s what I have been doing for the last 3 years, this is the first year I have noticed any marks on it, would you say this needs done urgently, I have turbine back up and was hoping I could leave it until the spring time now and combine it with its next service, I don’t really like taking it up and down too much

    • admin says:

      A healthy slipring or commutator has a smooth chocolate-coloured surface. Avoid scratching it, scoring it or changing the curvature in any way. Yours looks urgent to me, but if both brushes are working properly and the rough spot is limited, you might be OK to leave it.

  7. Colm says:

    Would it be dangerous to leave it like that, as in could it cause more damage to the rest of the turbine, or will it just reduce its efficiency until it is repaired?

    • admin says:

      Personally I’d deal with it straight away but if it fails then the turbine will not come to harm. It might just vibrate a bit loudly if one phase stops working.

  8. Colm says:

    Thanks Hugh, I’ll try to get it sorted out in the next couple of weeks, do you know how the slip rings are removed?

    • admin says:

      You may wish to dismount the whole brush assembly first. Use a 3mm allen key to loosen the grub screws deep within holes in the plastic body. Then you can pull it off the tower top spigot. Remove the cable, but don’t lose it down the tower.

  9. Colm says:

    Thanks Hugh very helpful, I’ll let you know how I get on

  10. Colm says:

    Update, I had my installer come out to replace the slips rings with a refurbished set, I do not have a lathe or any proper equipment to refinish them myself, Hopefully they will last for another 5 years at least.

    Thanks for your help Hugh

    • admin says:

      Five years would be a very short life for the sliprings. I hope they were installed with some regard for alignment, and free of grit and grease.

  11. Colm says:

    Yes Hopefully, I will check them again next summer when it down for its annual service

  12. GERALD RIGBY says:

    I have a problem 2008 PROVEN 6KW front bearing is gone taken of blades loosened the grub screws on the bearing collars taken of the 8 bearing bolts and the M16 bolt on the stater how do I move the shaft and the disc brake on it

    GERALD

    • admin says:

      hi Gerald,
      So far as I know you need to pull off the magnet rotors and the stator to strip the machine. Strong forces involved and the magnets can be quite dangerous if things go wrong. You can lose a finger or worse. You need a strong puller to remove the first rotor and also to pull off the stator. Even the second rotor may be stiff to extract but at least you don’t have magnetism to contend with. Then putting it back together you will have to mind your fingers especially.
      Take care
      Hugh

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