Page 51 of 63 FirstFirst ... 41464748495051525354555661 ... LastLast
Results 751 to 765 of 941
  1. #751
    Join Date
    Jun 2011
    Location
    Australia east coast
    Age
    71
    Posts
    2,713

    Default

    Quote Originally Posted by lamestllama View Post
    How did you collect that much scrap lead?
    Friends with a scrappie

    Still got a substantial pile of lead bricks of 6kg each left over from ballasting the boat. Better to have too much than too little. I'm not selling them though, one day I might want to build another boat.

    Well actually I'd love to build another boat (or 3) but I can't buy another 10 years of life and I'm quite happy with the one I've got. Just - you always know you could do it faster & better the second time round......

    PDW

  2. #752
    Join Date
    Oct 2008
    Location
    N.W.Tasmania
    Posts
    1,407

    Default

    Quote Originally Posted by PDW View Post
    Friends with a scrappie


    PDW
    And here's me thinking that you had been to church, (in order to pinch the roof)

  3. #753
    Join Date
    Jun 2011
    Location
    Australia east coast
    Age
    71
    Posts
    2,713

    Default

    Quote Originally Posted by Ropetangler View Post
    And here's me thinking that you had been to church, (in order to pinch the roof)
    I'd be worried about the lightning strike when I darkened the doorway.....

    PDW

  4. #754
    Join Date
    Jun 2007
    Location
    Vic
    Age
    48
    Posts
    544

    Default

    I was cutting this 190mm round stock yesterday and thought it will take awhile so I went inside for a drink for a few minutes. Then I heard the noise as if the machine is jumping between the gears. I quickly ran out and saw the stock is too far forward at the moving jaw and the mounting end of the pull stroke was hitting on the stock, the big gear is lifting up! I think I have broke it, I will have a good look tonight when I get home.


    I remember someone was asking how to stop the machine from rocking back/forth with the wheels on. I am using the timber frame underneath for mine.
    Attached Images Attached Images

  5. #755
    Join Date
    Jun 2007
    Location
    sydney ( st marys )
    Age
    64
    Posts
    4,887

    Default

    Quote Originally Posted by jackaroo View Post
    I was cutting this 190mm round stock yesterday and thought it will take awhile so I went inside for a drink for a few minutes. Then I heard the noise as if the machine is jumping between the gears. I quickly ran out and saw the stock is too far forward at the moving jaw and the mounting end of the pull stroke was hitting on the stock, the big gear is lifting up! I think I have broke it, I will have a good look tonight when I get home.


    I remember someone was asking how to stop the machine from rocking back/forth with the wheels on. I am using the timber frame underneath for mine.
    So what did you learn from this?

  6. #756
    Join Date
    Jun 2007
    Location
    Vic
    Age
    48
    Posts
    544

    Default

    Quote Originally Posted by pipeclay View Post
    So what did you learn from this?
    Never leave it unattended at all! Even for a minute...more importantly, check and double check

  7. #757
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    Whenever I'm going to cut something that may have clearance issues before I start the cut I butt the end of the stock up against the blade/band and allow the arm to move through the full movement its gonna make in the cut..

  8. #758
    Join Date
    Jun 2007
    Location
    Vic
    Age
    48
    Posts
    544

    Default

    I thought that is a crack but I was lucky, one of the dowels has sheared off and the thread on the main bolt is stripped. I tapped it to 3/4" 10 tpi and put a stud in replacement of the 5/8" bolt. I also replaced 2 dowels by 8mm. There is one problem, the mating gears appear to be "grinding", I think I need a gasket to give them a bit of clearance?

    Regards,
    Trong
    Attached Images Attached Images

  9. #759
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    I had a scary one today. Misread the powtran manual for a p1500 inverter and set the frequency control element from 0.01hz to 0.1hz, thinking this would change the size of the steps when incrementing speeds. But it just changes the frequency multiplier so displaying 50hz it really meant 500hz. Which means my spindle and motor attempted to do 20000rpm very very briefly

    Sent from my Nokia 8 Sirocco using Tapatalk

  10. #760
    BobL is offline Member: Blue and white apron brigade
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    7,182

    Default

    Quote Originally Posted by caskwarrior View Post
    I had a scary one today. Misread the powtran manual for a p1500 inverter and set the frequency control element from 0.01hz to 0.1hz, thinking this would change the size of the steps when incrementing speeds. But it just changes the frequency multiplier so displaying 50hz it really meant 500hz. Which means my spindle and motor attempted to do 20000rpm very very briefly

    Sent from my Nokia 8 Sirocco using Tapatalk
    Did the VFD shut itself down? this is what usually happens when the motor can't cope.

    A similar thing happened to me when one of the band new HYs tried to crank up the 4 pole motor up to 400 Hz.
    Fortunately the VFD looked after everything and it never went past~ 200 Hz before shutting itself down.
    Now I always perform a factory reset on all new VFDs

  11. #761
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    I shut it down when I heard it making what I call 'the scary bad whistle' and because I had have the breaking resistor set up it stopped almost instantly.

    Your point brings up something interesting, why does the VFD care about pole count? Just curious what it would change in supply characteristics?

    Sent from my Nokia 8 Sirocco using Tapatalk

  12. #762
    Join Date
    Sep 2012
    Location
    York, North Yorkshire UK
    Posts
    6,439

    Default

    Hi Ralph,

    The motor speed is frequency dependant. If you feed a two pole motor with 50 Hz it will run at 3000 rpm. Do the same with a four pole motor and it will run at 1500 rpm, and so on 8 poles 750 rpm.

    The VFD wants to know then it can use the correct frequency to provide the speed you asked for.
    Best Regards:
    Baron J.

  13. #763
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    Ahhh I guess I just don't ever use motor rpm as my control element.

    Sent from my Nokia 8 Sirocco using Tapatalk

  14. #764
    Join Date
    Apr 2012
    Location
    Healesville
    Posts
    2,129

    Default

    Quote Originally Posted by caskwarrior View Post
    I had a scary one today. Misread the powtran manual for a p1500 inverter and set the frequency control element from 0.01hz to 0.1hz, thinking this would change the size of the steps when incrementing speeds.
    G/day Ralph, do you have to spin the knob a zillion times to adjust the speed?
    If you work out how fix the problem let me know please, I have the same prob and did the same as you.
    I have been through the book to no avail.

    cheers, shed

  15. #765
    Join Date
    Jul 2016
    Location
    Melbourne
    Age
    35
    Posts
    1,522

    Default

    Yeah I sure did it's driving me nuts. If I find out I'll let you know straight away!

    Sent from my Nokia 8 Sirocco using Tapatalk

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •