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MiniMill Smoothie

Discussion in 'CNC Mills/Routers' started by Andrew Helsel, Jul 9, 2017.

MiniMill Smoothie

MiniMill Smoothie

Discussion in 'CNC Mills/Routers' started by Andrew Helsel, Jul 9, 2017.

MiniMill with DW611 and SmoothieBoard 4x v1.1

Mini Mill DW611 smoothie smoothieboard Allegro A5984 C beam
  1. Andrew Helsel

    Andrew Helsel New
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    #1 Andrew Helsel, Jul 9, 2017
  2. Julius

    Julius Well-Known
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    motors do not overload drivers, its the other way around. You can power 400A motors with a 2A driver if you want, but it will be 1/200th of the strength. Get some TB6600 drivers instead and dont have the electronics on the machine!
     
    #2 Julius, Jul 9, 2017
    stargeezer likes this.
  3. Andrew Helsel

    Andrew Helsel New
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    Ah, I clearly forgot about how DC current draw works. Thanks for the heads-up. Wonder if the 2A motors operate differently at 2A than the 2.8A spec motors which would be under-powered if they're a different design?

    I plan on having two machines, so as my budget improves, at least all 6 motors will be utilized and nothing goes to waste. TB6600 looks like a great recommendation, muchos gracias.

    I'm contemplating THK ballscrew actuators and steel gantry for the next build, and even thinking about ClearPath hybrid motors after reading the Neo7CNC pages. Ultimately, I want to have very very accurate capabilities for some performance auto parts I wish to make soon. Individual throttle body systems, reduced pullies (reason I bought a 4x board, rotory axis) and others.

    And all my electronics will be mounted in an enclosure under a steel tabletop. It's an empty server rack and everything should fit perfectly.
     
    #3 Andrew Helsel, Jul 9, 2017
    Last edited: Jul 9, 2017
  4. Julius

    Julius Well-Known
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    IF the motors are both the same torque rating, the 2A will operate properly at 2A supply, while the 2.8A ones will be slightly underpowered because they are made with a higher inductance.
     
    #4 Julius, Jul 9, 2017
    Last edited by a moderator: Jul 31, 2017
  5. stargeezer

    stargeezer Journeyman
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    Hi Andrew. Nice build and thanks for the pics. Very nice work!

    Larry
     
    #5 stargeezer, Jul 11, 2017
  6. Andrew Helsel

    Andrew Helsel New
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    Thanks, it's a nice weekend project when pieces show up.
     
    #6 Andrew Helsel, Aug 25, 2017
  7. Andrew Helsel

    Andrew Helsel New
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    Having trouble setting up RUN signal from pin 2.12 into the SuperPID still. config.txt file attached for anyone who may be able to assist... (there's a file called config_CNConly.txt but it's a draft and I wasn't able to delete that file)

    SuperPID instructions here say this:

    "RUN This is an input that controls the router ON - OFF. This is normally driven from a logic level signal where 0v = router RUN and 5v = router OFF. This input can also be driven from an open-drain (or pulldown) control like a switch to ground, or an open drain control wire (like an output from a G540)."

    So I tried 2.12o and 2.12v for open drain or pulldown, M3 does nothing. Maybe this command is not going to give me RUN?

    spindle_switch_on_pin 2.12v(or 2.12o)

    In fact, here's my mess - I just need help learning more of the firmware mechanics, what's unnecessary, etc:


    ## Spindle settings
    spindle_enable true
    spindle_pwm_pin 2.5
    spindle_pwm_period 50
    spindle_feedback_pin 2.6
    spindle_pulses_per_rev 1
    spindle_default_rpm 5000
    spindle_control_P 0.1
    spindle_control_I 0.1
    spindle_control_D 0.1
    spindle_control_smoothing 0.1
    spindle_switch_on_pin 2.12v
    spindle_max_rpm 30000
    spindle_min_rpm 0
     

    Attached Files:

    #7 Andrew Helsel, Aug 27, 2017
  8. DaveStewart

    DaveStewart New
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    Very nice build Andrew. My electronics are almost complete but a tad unorganized. :(
    Your layout has given me some pointers and inspiration.
    Keep up the good work.
    Cheers, D.
     
    #8 DaveStewart, Aug 27, 2017
    Andrew Helsel likes this.
  9. Lofton Harris

    Lofton Harris New
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    Andrew, if you haven't already I suggest you visit:
    Google Groups
    Someone there can probably assist. I'll be using a Smoothieboard on my build, but with a spindle and do not intend to use the board to control the spindle (even though it came with a PWM board). I'm impressed with your wiring; mine is much less elaborate. My Smoothie is mounted on the mini mill while the power supplies are separate. At some point I'll consolidate everything into one box.
     
    #9 Lofton Harris, Aug 27, 2017
    Andrew Helsel likes this.
  10. Andrew Helsel

    Andrew Helsel New
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    Yes, I wanted to be able to switch from GCode to manual PID control, hence the DPDT switch; the open loop switch might never be used but the option is cool. I keep adding panel sockets - like the Deutsche DT style auto connectors for the LED ring, E stop and 3-pin speed sensor. Just glad it works and no Sparks or blue smoke has flown.
     

    Attached Files:

    #10 Andrew Helsel, Aug 27, 2017
  11. Lofton Harris

    Lofton Harris New
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    Brown smoke is the worst. To be avoided at all costs.
     
    #11 Lofton Harris, Aug 27, 2017
  12. cginca

    cginca New
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    Nice build; I was thinking of something similar. What kind of rapid speeds are you able to get?

    Are you happy with the smoothie control?
     
    #12 cginca, Oct 6, 2017
  13. Michael Dwyer

    Michael Dwyer New
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    Nice build, but something is just wrong when the electrical enclosure is larger than the machine itself. LOL, I'm a mechanical engineer!
     
    #13 Michael Dwyer, Oct 23, 2017
  14. RuneK

    RuneK New
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    Not sure if you have solved Smoothie connection to VFD, but as my Super-pid is slowly moving towards my postbox I had some time reading som specs. I plan to connect super-pid to a smoothieboard.

    I belive your config for smoothie should be changed to the settings smoothie describes under Analog Spindle.

    Code:
    spindle.type                                     analog   # set the spindle type to analog, can also be used for ESC spindles controlled by a PWM
spindle.max_rpm                                  30000    # set the max spindle speed that is achieved at 100% PWM
spindle.pwm_pin                                  2.4      # the pin which emits the PWM signal
spindle.pwm_period                               1000     # the PWM frequency
spindle.switch_on_pin                            2.6      # the pin which is used to enable the VFD (optional)

    Just Remeber that Smoothie use 0-10v for speed reference signal. And from the instruction at Super-pid, they expect 0-5v. If you look in the Super-Pid Instructions they have a solution for the 0-5 vs 0-10v

    "Super-PID can accept a speed control voltage of 0v to 10v (or 0v to 12v) from a controller, but this needs to be reduced to 0v to 5v by using 2 resistors, as a simple voltage reducer."

    PWM Frequency is a bit unclear for me yet, and so for tacho reading back to smoothie, but I am continue to look for it.
     
    #14 RuneK, Nov 1, 2017

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