Hurco BMC20 Dynomotion Retrofit - Page 25


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Thread: Hurco BMC20 Dynomotion Retrofit

  1. #289
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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Here is a little video of the test gcode of a high speed toolpath.


    http://www.homecncstuff.elementfx.com/


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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Those poor ballscews. I try and avoid really tight adaptive paths personally. But looks like its doing it fairly well

    Seems like your hurco is built more solid then my machine. My mill would sound terrible with that toolpath at that speed.



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    Default Re: Hurco BMC20 Dynomotion Retrofit

    You should have heard ball screws before the fine tuning was done.
    I was fairly surprised by the whole design of this machine giving its year. This toolpath would be a "worst case" scenario, more of a acid test. Got another test cutting some plywood that i will post a video of later.

    http://www.homecncstuff.elementfx.com/


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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Here is a test cut in plywood that i think Tom will like.


    http://www.homecncstuff.elementfx.com/


  5. #293
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    Default



    TK
    http://dynomotion.com


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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Quote Originally Posted by TomKerekes View Post
    Hi Troy,

    Do you have any action configured for Halt in KMotionCNC | Tool Setup?

    Regards
    Hi Tom,
    Was there something that you working toward when you asked this? Concerning the spindle runaway when feedhold is pressed during a G84 tap cycle?
    Just to re answer, yes i have a C program that sets both CW and CCW bits for spindle to shut off and MDI a G80 and G40.

    Troy

    http://www.homecncstuff.elementfx.com/


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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Hi Troy, Yes. In that case you might try temporarily removing the Halt Action to see if it is related. G84 will invoke M119 to run a C Program using some Thread. Is your Halt Action configured to use the same Thread? Regards

    TK
    http://dynomotion.com


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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Hi Tom,
    I removed the C program from Halt action and the M30 action, but after i feed hold (not halt) during tap cycle the spindle still runs away to full RPM. Axis do not move.

    http://www.homecncstuff.elementfx.com/


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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Hi Troy,

    Do you have an Action assigned to Feedhold?

    Please post the current Version of the Rigid tapping C program you are using.

    Regards

    TK
    http://dynomotion.com


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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Nope. No Action for feed hold.
    Attached is Rigid Tap C program.

    Attached Files Attached Files
    http://www.homecncstuff.elementfx.com/


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    Default Re: Hurco BMC20 Dynomotion Retrofit

    I still think you might be better off blocking feedhold to stay out of trouble. Its not an easy fix without major changes to the rigidtap program and init file. But if your set on getting it to work. Keep it mind that you dont actually want to do a normal stopcordinatedmotion like a normal feedhold would do. To properly stop while spinde is slaving in the rigidtapping program you need to just simply stop spindle and the Z will be still slaving and also stop with it and everything will stay in sync.

    You could probably set a userpersist variable to indicate tapping is active and in your init file, when you press your feed hold button it could check if tapping is active or not and then either stop the spindle if tapping or do a normal stop co-ordinated motion if tapping is not active. And your cycle start button could check for the same to resume. Another userpersist variable could be set in the tapping program to set which direction the spindle needs to be restarted in.

    Another issue you will have is if you setup feedhold to stop spindle and your almost finished and it coasts to the bottom it will restart again in reverse. If you turn tap by hand it could restart. A lot of complications and possible safety issues. Sorry i dont have any suggestions about the spindle ramp problem, but i just wanted to point these things out. Good luck with it.



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    Default Re: Hurco BMC20 Dynomotion Retrofit

    Hi Murray,
    Having the feedhold turn off spindle i think would be the best way to handle it during a tap cycle.
    As for restarting and reversing at bottom of hole, can there be way to ignore this when in feed hold? Or maybe Estop whole machine? Would be safer to break a tap than harm someone.

    http://www.homecncstuff.elementfx.com/


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