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  1. #81
    Join Date
    Feb 2014
    Posts
    187

    Re: Bridgeport Manual to CNC Conversion...

    Anyone here running a BR2J head at 4000 rpm?

    I've wound my inverter up to 133Hz which gives 4000 rpm but didn't want to risk damage.

    Seems the spec sheets show 2300 or 4200 rpm - is there a difference in models here?

  2. #82
    Join Date
    May 2018
    Posts
    11

    Re: Bridgeport Manual to CNC Conversion...

    Hi!!

    Anyone in this forum with Bridgeport milling machine have this measurement from y axis bearing assembly bracket ... attached photo with "???????"



    Thank you in advance
    Attached Thumbnails Attached Thumbnails yaxis.png  

  3. #83
    Join Date
    Feb 2014
    Posts
    187

    Re: Bridgeport Manual to CNC Conversion...

    The larger dimension is approximately 40.6mm and the smaller 37.4mm

    These were taken from my motor mount plate cad file but i may have filed them to fit later on so i cant be 100% certain the are correct

  4. #84
    Join Date
    May 2018
    Posts
    11
    Quote Originally Posted by davek0974 View Post
    The larger dimension is approximately 40.6mm and the smaller 37.4mm

    These were taken from my motor mount plate cad file but i may have filed them to fit later on so i cant be 100% certain the are correct
    Another guy in this forum Willliam says that is the larger dimensions 42,50mm approximately and the smaller is 35,60mm ...

    Beacuse I can’t find the correct data

    I decided to take off the bearing bracket and take a measurement !!!

  5. #85
    Join Date
    Feb 2014
    Posts
    187

    Re: Bridgeport Manual to CNC Conversion...

    Its probably the best way

  6. #86
    Join Date
    Jul 2018
    Posts
    58

    Re: Bridgeport Manual to CNC Conversion...

    Quote Originally Posted by davek0974 View Post
    Got the limits and home switch fitted today, moving switches and fixed cams so I could do it all with two switches
    Top switch is limit and bottom is home.

    Attachment 384708

    had to alter my plan of homing to top as with the vise fitted the bed will crash...

    Attachment 384710

    All the way down, a lot of cranking....

    Attachment 384712

    Wired the limit switch into the loop, just the home to take back to cabinet...

    Attachment 384714
    wow that z axis looks interesting I went very basic.

  7. #87
    Join Date
    Feb 2014
    Posts
    187

    Re: Bridgeport Manual to CNC Conversion...

    It should work, lots of ways to do this.

    Watch out for backlash in the quill rack/pinion, might not be an issue but good to remember.

  8. #88
    Join Date
    Sep 2008
    Posts
    157

    Re: Bridgeport Manual to CNC Conversion...

    My conversion cutting steel plate shows the Z axis in action

    https://youtu.be/fVrYtKS9aeE

  9. #89
    Join Date
    Sep 2008
    Posts
    157

    Re: Bridgeport Manual to CNC Conversion...

    I can not see the video I have posted above and others have gone the same way on my thread? Can anyone see it? What has gone wrong?
    Cheers John

  10. #90
    Join Date
    Feb 2014
    Posts
    187

    Re: Bridgeport Manual to CNC Conversion...

    Quote Originally Posted by BMSTECH View Post
    My conversion cutting steel plate shows the Z axis in action

    https://youtu.be/fVrYtKS9aeE
    Very nice, that Z drive is the way i should have gone, about as tight as it can get i reckon.

    Cube looks good too.

  11. #91
    Join Date
    Dec 2006
    Posts
    87

    Re: Bridgeport Manual to CNC Conversion...

    Quote Originally Posted by mactec54 View Post
    I started doing this around 20 years ago, here is a photo of one I did, this is very modified Head, that is 5" shorter than the standard Bridgeport Head
    that is SWEET !!

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