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  1. #151
    Join Date
    Jan 2006
    Location
    Moss Vale NSW
    Age
    80
    Posts
    317

    Default

    Greg,
    I had used helical couplers on my Y & Z, but found that my Z coupling had broken just with a bit of up and down with the portable drill. So I thought that I should go for a coupling with a bit more "guts"! My shaft alignment is minutely out, which may have caused the broken coupling. I can fix that, but the Oldham style coupling should account for that mis-alignment anyway. I have found the Oldham coupling on the TEA website ... any other suggestions?

    Cheers,

    Alan
    4 out of 3 people have trouble with fractions.

  2. # ADS
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  3. #152
    Join Date
    May 2005
    Location
    Cockatoo Vic
    Posts
    996

    Default

    Always a good idea to get the alignment as close as possible.

    Peter has a couple of sizes. Was the one that failed small?

    I happen to have a 1/4 by 1/4 lovejoy sitting on my desk. Do you want me to put it in the post?

    Greg

  4. #153
    Join Date
    Jan 2006
    Location
    Moss Vale NSW
    Age
    80
    Posts
    317

    Default

    Greg,
    Thanks for the offer, much appreciated. But I am connecting the 1/4" motor shaft to an 8mm ballscrew end, so would need two different hubs (I think!).

    Cheers,

    Alan
    4 out of 3 people have trouble with fractions.

  5. #154
    Join Date
    May 2005
    Location
    Cockatoo Vic
    Posts
    996

    Default

    That is not an issue. I just put it in the lathe and take it out to 8mm.

    Greg

  6. #155
    Join Date
    May 2003
    Location
    Perth WA
    Posts
    3,784

    Default

    Hi Allan,
    The detail of your work is great - even down to shaped brackets for the cable tray.
    Cheers,
    Rod

  7. #156
    Join Date
    Jan 2006
    Location
    Moss Vale NSW
    Age
    80
    Posts
    317

    Default Spindle Wiring Question

    With my 1.5kw air cooled spindle only 3 wires actually connect to the spindle so the 4th wire is presumably an earth. I am proposing to connect this to the Z axis plate, but as this is just a general earth, does it have to be shielded? If not then I assume that I could just buy 3 core shielded for the spindle and run the earth as a separate wire back to the main earthing point. Would the shielding be suitable as the earth connection?

    Help,

    Alan
    4 out of 3 people have trouble with fractions.

  8. #157
    Join Date
    Feb 2008
    Location
    NOWRA
    Posts
    648

    Default

    I wouldn't recommend using shielding as the earthing. Your better option is to run a dedicated earth cable to the metal parts of the cnc including your z axis. As long as everything is metals and not insulated from each other it will save you having to buy 4 core cable and probably safer.

    Just an opinion though.

    Daniel

  9. #158
    Join Date
    Jan 2006
    Location
    Moss Vale NSW
    Age
    80
    Posts
    317

    Default

    Rod,
    I am pleased that you noticed my cable tray bracket ... have attached a close up!!

    Cheers,

    Alan
    4 out of 3 people have trouble with fractions.

  10. #159
    Join Date
    Mar 2007
    Location
    Melbourne - Mexico
    Posts
    655

    Default

    Alan,

    is that bought cable tray or did you make it using the files from the zone that was linked from this site a couple of months ago.

    If bought - how much and where from please, but this also goes for others please for suppliers

    PS - really nice work and keep up the progress. I know how hard it is to get a couple of hours straight running on a project - consecutively that is.

    /M

  11. #160
    Join Date
    Jul 2006
    Location
    Port Huon
    Posts
    2,685

    Default

    eBay seller linearmotionbearings2008 has 'drag chain' listed for sale.

  12. #161
    Join Date
    May 2003
    Location
    Perth WA
    Posts
    3,784

    Default

    Hhi Alan,
    The signature series tray support.
    What is the motif?
    This level of detail does make a difference and makes the machine look more professional.
    Cheers,
    Rod

  13. #162
    Join Date
    Jan 2006
    Location
    Moss Vale NSW
    Age
    80
    Posts
    317

    Default

    My logo is a stylised tree (or if you look at it after a couple of chardonays, it could be a leaf) ... no specific concept ... I just liked it!!

    As far as the cable chain is concerned, Geoff got it in one ... Chai from Linear Motion bearings. I can't remember the price and have hidden all of my invoices because I didn't want to know how much I had spent on my 'modest price table', at least that it what I originally called it when I started out!!!

    Cheers,

    Alan
    4 out of 3 people have trouble with fractions.

  14. #163
    Join Date
    Jan 2006
    Location
    Moss Vale NSW
    Age
    80
    Posts
    317

    Default

    Just so that people don't think that my build has come to a complete stop, I have posted a couple of times to other threads ... such as ...
    https://www.woodworkforums.com/showpo...7&postcount=15 and https://www.woodworkforums.com/showpo...3&postcount=24.

    How do people do those nice links where you just click "here" rather than all the www mumbo above?

    I have fitted a couple of things onto my Z axis ... one is an alum tube which keeps my air blower pipe nice and tidy and the other is an acrylic block with my cross hairs laser installed. When I bought the cross hair lasers, I think it was Greg said that you need to buy a few as their focus is problematical ... well I bought 3 tested them all and got one which is in reasonable focus.

    Cheers,

    Alan
    4 out of 3 people have trouble with fractions.

  15. #164
    Join Date
    May 2003
    Location
    Perth WA
    Posts
    3,784

    Default

    Try this here
    Cheers,
    Rod

  16. #165
    Join Date
    Feb 2008
    Location
    NOWRA
    Posts
    648

    Default

    Hey Alan,

    Machine is looking very nice, especially your z axis. Like the way the air blower is out of the way.

    Daniel

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