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IndustryArena Forum > MetalWorking Machines > Bridgeport / Hardinge Mills > Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues
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  1. #1

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    Nov 2019
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    Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    Hi,

    I'm new to this forum. Just bought my first CNC mill which is a Bridgeport Interact Series 1. I'm just getting my head around the cycles which the machine has in it's TNC145 control.

    At the moment I'm trying to get the tapping cycle working successfully, though I keep stripping the thread as the tool is retracted. I'm using a M8 x 1.25 spiral flute tap on an aluminium plate. I'm using a feedrate of 625mm/min, spindle speed 500RPM and dwell time 0sec. The thread seems to be cutting okay as the spindle plunges into the workpiece (clockwise), though then dwells for 1 second with the spindle rotating before the spindle is automatically reversed and the tap is retracted at the same federate and spindle rpm.

    Is there a way to remove this 1 second dwell between spindle rotations? I feel this is causing the thread to be stripped out....

    Thanks,
    Ben

  2. #2
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    May 2016
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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    How are you holding the tap

  3. #3

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    Nov 2019
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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    I have the tap rigidly mounted in a QC30 tool holder

  4. #4
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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    There is no rigid tapping on that machine change to a floating tapping head and will solve problem the dwell allows for the spindle to stop and reverse

  5. #5

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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    Though when the z-axis 'dwells' for a second the spindle is still spinning clockwise. Would a floating tapping head prevent the threads from stripping when the z-axis is stationary and the spindle is still spinning clockwise?

  6. #6
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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    Yes as the spindle slows the head allows the tap to float down a couple of mm's and on retraction it starts lifting up preventing threads stripping

  7. #7

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    Nov 2019
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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    Great thanks! Would you be able to recommend a certain type of floating head for the Bridgeport interact QC30 toolholder?

  8. #8
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    May 2016
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    426

    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    You may be able to get away with spring loaded collets dependant on speeds and tap size
    Where are you based

  9. #9

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    Nov 2019
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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    Bristol

  10. #10
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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    Message me your email or phone number and I'll send you a pic as I'm in Kent

  11. #11

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    Nov 2019
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    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues


  12. #12
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    Aug 2009
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    408

    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    ..Hi All,

    I was reading your thread and went looking for an example of a Floating Tap holder QC30 type. I don't think anyone makes them but, I did discover something interestingly new to me about CNC Tooling available these days (for a price)...so I will pass it on as more options for ya.
    https://www.cncshop.com/us_en/er32-f...ap-collet.html

    happy hunting,
    DJ

  13. #13

    Join Date
    Nov 2019
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    8

    Re: Bridgeport Interact Series 1 - TNC145 Tapping Cycle Issues

    Thanks DJ! Yeah comes at a price :/ was hoping to find a cheaper solution.....

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