Changing endmill on work

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This topic contains 2 replies, has 2 voices, and was last updated by Profile photo of SteveC SteveC 1 year, 7 months ago.

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  • #4885
    Profile photo of Francesco
    Francesco
    Participant

    Hi to all,

    looking this video at 51 seconds endmill has been changed.

    After changing it X-Y will be moved (to change the mill) and Z will be moved too because mill could be taller (or smaller) and for sure isnt possible to place it at the exactly same height.

    So, how i can change the drill after processes ? For example, from roughing to finishing.

    Thanks a lot

    #4890
    Profile photo of SteveC
    SteveC
    Participant

    Francesco,
    It depends on what your post processor file tells the CNC to do between tool changes. If you don’t have X,Y and Z end stops or some easy to locate origin then you need to have all tool paths in one gcode file and have the steppers locked between tool changes. I don’t bother with ends stops.

    I use Fusion 360 and a MPCNC specific post processor http://www.vicious1.com/forum/topic/fusion-360/#post-4237 that pauses between tool paths. It pauses, displays “Change tool” on my LCD, moves to a location near the origin that gives me space to get the bit out, and most importantly it keeps the steppers locked(powered) and disables the normal 1 minute timeout on a stepper lock. This way I can carefully change the bit without the axes losing their place. I then just resume and it starts milling the next tool path. See this example http://www.vicious1.com/forum/topic/cosx2y2-milled-in-wood-post-1/ where I changed from an 1/8″ end mill for the outline and roughing to an 1/8″ ball mill for finishing. I just make my origin at one corner of the stock. It works great. I have not used Estlcam so I’m not sure how to control tool changes for it.

    Does this make sense?

    #4892
    Profile photo of SteveC
    SteveC
    Participant

    Also, using this scheme it is important that the bits be inserted to the same depth to align with the Z axis origin. See my bit depth insertion guide (just a block of wood with a notch cut in it) to make this easy http://www.vicious1.com/forum/topic/fusion-360/#post-4237.

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