Homann Designs TM20LV (BF20,G0704) conversion - Page 16


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Thread: Homann Designs TM20LV (BF20,G0704) conversion

  1. #301
    Member phomann's Avatar
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    Default Re: Homann Designs TM20LV (BF20,G0704) conversion

    Hi All,

    Well it's been a while, I've done a few improvements on the mill. I've been using it a lot. It is probably ready for a double nut ballscrew upgrade.

    I did the revision of the I/O status board on the front of the mill. The main upgrades were;
    1. Added an optoisolated switch that is activated when the phono jack is plugged in.
    2. Added a 2nd phono jack. They both activate the same input 4, but one is active hi, the other active lo. I got fed up with having to change the Mach3 configuration whenever I changed from the touch probe (N/C) to the tool offset plate (N/O).
    3. Both of the phono sockets are stereo sockets. I did this so that a stereo jack can be used to supply 12 volts to whatever is plugged into it. As a consequence I've added switches to turn off the 12V when mono jacks are used. I've also added a poly fuse so things don't smoke if a mono jack is plugged in with the 12V supply switched on.



    Homann Designs TM20LV (BF20,G0704) conversion-gc-10-5-jpg Homann Designs TM20LV (BF20,G0704) conversion-gc-10-1-jpg

    The GC-10 board is basically a general purpose I/O board for the Geckodrive G540. On the bottom right you can see the relay switch outputs. They can be used in various setup to disable the spindle when a phono jack is plugged into the board.

    Cheers,

    Peter

    Attached Thumbnails Attached Thumbnails Homann Designs TM20LV (BF20,G0704) conversion-gc-10-5-jpg   Homann Designs TM20LV (BF20,G0704) conversion-gc-10-1-jpg  
    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com


  2. #302
    Member phomann's Avatar
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    Default Re: Homann Designs TM20LV (BF20,G0704) conversion

    The image below shows the GC-10 board mounted into the aluminium plate along with the original TM20LV mill tach0. You can see the relay outputs wired into the Input 3 input. (blue ferrules)

    Homann Designs TM20LV (BF20,G0704) conversion-gc-10-2-jpg Homann Designs TM20LV (BF20,G0704) conversion-gc-10-4-jpg

    The two tone plastic is glued to the 1mm aluminium plate with supper 77 spray adhesive prior to engraving and cutting.

    Cheers,

    Peter

    Attached Thumbnails Attached Thumbnails Homann Designs TM20LV (BF20,G0704) conversion-gc-10-2-jpg   Homann Designs TM20LV (BF20,G0704) conversion-gc-10-4-jpg  
    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com


  3. #303
    Member phomann's Avatar
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    Default Re: Homann Designs TM20LV (BF20,G0704) conversion

    The image below show the panel in place. You can see that input 3 is active due to the touch probe being plugged in. Note that the probe in connected to input 4 and and is not active.

    Homann Designs TM20LV (BF20,G0704) conversion-gc-10-3-jpg

    My next project on the mill is to install a power drawbar.

    Cheers,

    Peter

    Attached Thumbnails Attached Thumbnails Homann Designs TM20LV (BF20,G0704) conversion-gc-10-3-jpg  
    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com


  4. #304
    Member phomann's Avatar
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    Default Re: Homann Designs TM20LV (BF20,G0704) conversion

    One other thing I did to disable the spindle when the probe is plugged in was to process input 3 that is indicating the phono jack is plugged in to input 4.

    I modified the M3 and M4 macros in Mach3 to check the status of input 3. The modified macros are below;

    M3 macro
    Code:
    If (Not IsActive(INPUT3)) Then
    	DoSpinCW()
    else
    	Message "Probe is plugged in"
    	DoOEMButton(1021)
    end if
    M4 macro
    Code:
    If (Not IsActive(INPUT3)) Then
    	DoSpinCCW()
    else
    	Message "Probe is plugged in"
    	DoOEMButton(1021)
    end if
    I also changed the the button script for the spindle toggle button on the Mach3 pages that uses the button to the following;
    Code:
    If (Not IsActive(INPUT3)) Then	DoOEMButton(110)
    Else
    	Message "Probe is plugged in"
    	DoOEMButton(1021)
    End If
    BTW OEMButton 1021 is the reset button, causing Mach3 to go into reset if an attempt to run the spindle when the probe is plugged in.

    Cheers,

    Peter

    -------------------------------------------------
    Homann Designs - http://www.homanndesigns.com


  5. #305
    Member Fastest1's Avatar
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    Default Re: Homann Designs TM20LV (BF20,G0704) conversion

    Nice job, Peter!

    A lazy man does it twice.


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Homann Designs TM20LV (BF20,G0704) conversion

Homann Designs TM20LV (BF20,G0704) conversion