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  1. #1
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    Default My 32" L.S. Barker Bandsaw is alive...

    After a long time with not much time to work on restoring my saw, I've finally had the VFD all sorted, new tyres on, all re-greased, guides straightened out and after some fine tuning, fired her up today. A 45 second start-up time and 60 seconds to stop (the VFD doing the braking) and it all works really well. Still a few things to go, but...

    ...what this project has made me realise is that the saw is way too much saw for me and my small shed.

    DSC07565.jpg

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  3. #2
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    Jan 2017
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    The brain!

    DSC07559.jpg

  4. #3
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    Default

    Nice.. where did you get the tires done?

  5. #4
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    .. and the wiring of that VSD is a disgrace.

  6. #5
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    Default

    Quote Originally Posted by ab1 View Post
    .. and the wiring of that VSD is a disgrace.
    It's fine, it's temporary.

  7. #6
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    Quote Originally Posted by ab1 View Post
    Nice.. where did you get the tires done?
    I bought the tyres from thewoodkid.com.au and glued them on with Sikaflex

  8. #7
    Join Date
    Nov 2012
    Location
    brisbane
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    Default

    What is the reason for your VFD ?
    i have a large bandsaw which screech’s at the start (with a DOL starter), would a VFD solve the problem?
    i would appreciate your input

  9. #8
    Join Date
    Feb 2006
    Location
    Perth
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    Default

    Quote Originally Posted by gtvone View Post
    After a long time with not much time to work on restoring my saw, I've finally had the VFD all sorted, new tyres on, all re-greased, guides straightened out and after some fine tuning, fired her up today. A 45 second start-up time and 60 seconds to stop (the VFD doing the braking) and it all works really well.
    IMHO 60s is still on the unsafe side even for a big BS. Have you tried making it shorter. Doe the VFD use a proper braking resistor? A VFD with a braking resistor should be able to do it much quicker, certainly <10s.

  10. #9
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    Quote Originally Posted by Turri View Post
    What is the reason for your VFD ?
    i have a large bandsaw which screech’s at the start (with a DOL starter), would a VFD solve the problem?
    i would appreciate your input
    The screeching is the belts slipping. Make sure the belts are correctly tightened and get some "belt grip"
    eg CRC Belt Grip - 400g | Supercheap Auto

    If you don't fix this in the long run the belts will be damaged.

  11. #10
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    Under about 30 seconds and the VFD starts to smoke (I only tried/made that mistake once). A 32" cast wheel carries a LOT of energy... I based my speed-down time on Andy Rawl's rebuild and settings. (And I'm the only one that uses it / is in the shed, so I'm fine with it.)

  12. #11
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    Quote Originally Posted by gtvone View Post
    Under about 30 seconds and the VFD starts to smoke (I only tried/made that mistake once).
    Well it does not surprise me it let out smoke unless it utilises a breaking resistor as shown below (rectangular silver thing under the VFD)
    This is for a radial arm saw and stops the saw in 2 seconds.
    Obviously it's not going to be 2s for a large bandsaw but it should still be under 10s.
    BTW Not all VFDs have the built in circuitry to handle such braking resistors.
    VFDandBrake.jpg

    My BS is only a 19" but it runs for about 2 minute after it's switched off (virtually silently for the last 60s or so) and have been nearly caught out several times because it is so quite.

    Although I also have a VFD on mine I added a foot brake which then means I can adjust the breaking pressure depending on the size of the band in use. For large/wide bands I can stop it in a couple of seconds whereas for a thin/narrow (6mm) band I worry about damaging this band if breaking too hard so I go easy on the brake so that it stops in about 10s.

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