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Small mill project (SMP)

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  • #91
    Ah - I mainly did that because the casting of the column was all over the place and didn;t want to machine 'too much' out of it. So I just made a 2 inch wide slot to mate the riser block.

    Originally posted by Wildcatfan View Post
    Understood fitting within the column recess above.
    I should have worded it differently i guess.
    I was thinking less machining if the "male" part of the riser block was more "square" with radiused corners to fit inside the column and poossibly add more surface area for contact/ bolting.

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    • #92
      Analog spindle control with feedback.


      Last edited by skunkworks; 10-16-2018, 12:26 AM.

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      • #93
        putting it all together... a bit of sheet-metal/plastic...

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        • #94
          some more fiddling

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          • #95
            Re-wiring before finishing up the enclosure.. Getting close. More high quality videos soon...
            sam

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            • #96
              Originally posted by skunkworks View Post
              Analog spindle control with feedback.


              Seems you have that spindle dialed in nicely Sam.

              In the last week, I went to closed loop spindle with Linuxcnc on my bridgeport with VFD powered motor and spindle encoder. BOY does closed loop work great !

              (the BIG trick with closed loop spindle is the use of the maxerrorI pin for the PID loop, THAT prevents overshoot yet remains aggressive)

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              • #97
                Linuxcnc is pretty awesome..

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                • #98
                  getting there. Mainly now creating an enclosure...




                  sam
                  Last edited by skunkworks; 12-09-2018, 06:27 PM.

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                  • #99
                    Coming along nicely Sam. That spindle/head looks far more impressive with the covers on LOL

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                    • video.. (nothing really new)

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                      • Finally carved out some time to work on it... Trying a better spindle drive.. so far so good.

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                        • adaptive feed with spindle power...

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                          • working on getting a spindle encoder mounted.. There isn't an easy way to mount an actual encoder - so I went with a gear and using gear tooth sensors..

                            Machined a gear and mounted it to the spindle pully (the gear was something we had laying around...) 36 tooth + index



                            This is where is is going to live...



                            Testing the index hole... (pully flipped...)



                            Making a bracket... (the gear tooth sensors will be potted when I am sure the quadrature signal looks good)

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                            • More spindle encoder....

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                              • View of the sensors..

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