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Field Trip! Computer Numerical Control, both DIY and BIS (Big Industrial Stuff)

Maker Mark Kenworthy, the owner of Kenworthy Machine in Duvall, has kindly invited KingMakers out to see his shop and get a little tour.

Maker Jeff Kerr will bring his table-top CNC which he designed and built himself. He will be presenting it and encouraging us to build our own. Come learn how to create a tool which creates things!

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  • Doug B.

    Here is a bit of news relivant to our las meeting.

    Scientists build a low-cost, open-source 3-D metal printer
    http://phys.org/news/2013-12-scientists-low-cost-open-source-d-metal.html

    December 2, 2013

    • Mark K.

      These days it is mostly AC drives/motors. The DC motors in BIS have both a tach and an encoder. I'm not positive what exactly the AC motors have in them, but I think they use current sensing instead of a tach, but still use an encoder.

      December 4, 2013

    • Jeff K.

      Terminology has gotten a bit confusing. What used to be called a DC brushless servo motor is now more commonly called an AC brushless servo motor. Neither the term, AC or DC, is quite accurate with a servo motor because the current can be either constant or alternating depending on how the motor is moving. All servos use a feedback device, however - usually an encoder.

      1 · December 4, 2013

  • Mark K.

    BTW, we gained a couple of chairs at the meeting, so please let me know if they are yours, and we'll work out a time to get them back to you.

    December 3, 2013

    • Rollie

      I left two chairs, a goofy one from the 50's and a metal one.

      December 3, 2013

    • Mark K.

      Okay, I suppose we can bring them back to you at a future meetup, unless you want to trek back out to Duvall.

      December 4, 2013

  • Steven J G.

    I'm not sure how to continue discussion about this... Jeff Kerr, you showed us CNC machines using a servomotor configuration with a stepper motor. What about all those DC brushless motors out there for RC cars? Or does the fact that they use a sensorless driver put them out of the running?

    December 3, 2013

    • Warren D.

      The same thing crossed my mind. I figured that the encoder would make a stepper obsolete. Couple it to any geared motor to create an "infinite" 360° servo.

      Correct me if I'm wrong, but aren't brushless RC motors a bit like free-running 3-phase stepper motors? Sensing the back EMF from the motor to advance the cycle?

      December 4, 2013

    • Steven J G.

      December 4, 2013

  • SteveT

    Jeff, one note to the members is that everyone interested has to sign up to "follow" the message board. It is not enabled as the default.

    December 3, 2013

  • Jeff K.

    Good idea, SteveT - I've just started a continuation of this thread in Discussions.

    December 3, 2013

  • SteveT

    To continue discussion, why not use the discussion feature of the meetup???

    December 3, 2013

  • April A.

    Thank you to Mark and Jeff for sharing your expertise! I learned a lot!

    December 2, 2013

  • Mark

    Very good information, thanks Mark and Jeff!

    December 2, 2013

  • Doug B.

    My head, it still spins. Oh, and just how deep is this rabbit hole?<grin>

    December 2, 2013

    • Mark K.

      So deep you never will find the bottom. That's part of what makes this a fun and interesting business!

      December 2, 2013

  • Steve B.

    Great meetup! Thanks Mark for hosting, presenters, Dan for organizing.

    December 2, 2013

  • Jeff K.

    Mark, thanks for hosting and letting me make a mess!

    December 1, 2013

  • Steven J G.

    Thanks, Mark, for having us. Hugely informative, and hugely fun.

    December 1, 2013

  • Rollie

    This was a great meetup. I enjoyed hearing what Mark said about building his business. The show and tell was interesting too.

    1 · December 1, 2013

  • Brian_Henderson

    Thanks to Kenworthy and Maker's for great show & tell today. So many awesome projects.

    1 · December 1, 2013

  • Mark B.

    Thank you, Mark. It was nice to see your shop and listen to your stories about how you got where you are.

    1 · December 1, 2013

  • Jeff N.

    Really enjoyed this meetup learned a lot
    Thank you Mark. for inviting us to you really cool business

    1 · December 1, 2013

  • Mark K.

    Really enjoyed having everyone here!

    1 · December 1, 2013

  • Steven J G.

    Carpooling from OlyMEGA, four of us, four chairs. See you in two hours!

    December 1, 2013

  • Mark K.

    If you have safety glasses, please bring them. We have some we can share, but not near enough for the number of people planning to be here today.

    Also, I think we'll have another home shop CNC project here, this a conversion of a mill instead of being built from scratch like Jeff's.

    1 · December 1, 2013

    • Jim M.

      Sorry, I will be staying home today. Woke up sick. --Jim

      December 1, 2013

  • jason

    Anyone want to carpool from the issaquah area?

    December 1, 2013

  • Richard H

    Im new to all this. Do we meet at Marks place or in Duvall

    November 30, 2013

    • Dan T.

      We will be meeting at Mark's place this time. Use the address listed with the meetup.

      November 30, 2013

  • Mark K.

    Yes, we plan to run at least one of the big machines.

    November 30, 2013

  • Rollie

    Will we see some of the CNC equipment in action?

    November 30, 2013

    • Jeff K.

      I'm hoping so, if I can get my laptop woes straightened out.

      November 30, 2013

  • Jeff N.

    Hey all, i just finished up my CNC Project, still need to do some final tweaks and adjustments, I have posted a couple of videos out on youtube, they give you the general Idea. but for the most part it is near completion. http://youtu.be/ywW_GomtwNs

    http://youtu.be/n40orX35jq0

    Seee you all on the first.

    1 · November 27, 2013

  • Mark K.

    We're going to be short of chairs, so if you have some folding chairs, please bring them along! Parking will be a bit tight, so if you can carpool, that will help.

    Also, any of the mapping programs or GPS units will get you here, but once you get on 300th Avenue NE, it is best to go PAST NE 172nd Street and take the next right. That's our back driveway. Looks a bit strange, just a little gravel road heading off into the woods, but in a couple hundred yards you'll see the shop (red with green trim).

    We're looking forward to seeing everyone here on Sunday!

    Mark

    1 · November 27, 2013

  • Steven J G.

    Dan, if we don't see each other before this, I'll bring your solder pot and solder stick with me.

    1 · November 20, 2013

  • Steven J G.

    If anyone wants to carpool from Olympia/Lacey, RSVP here, too:
    http://www.meetup.com/OlyMEGA/events/151916792/

    November 20, 2013

  • Steven J G.

    A few of us from OlyMEGA are working on some CNC designs. Anyone want to carpool from Olympia, Lacey, etc? I am willing to pick people up from Tacoma and Federal Way. I have a van with a lot of seats.

    November 19, 2013

  • April A.

    Anyone want to carpool? I live in Ballard but could meet you somewhere that's more on the way.

    November 19, 2013

  • Mark K.

    Yes, on the 7 YO. We've hosted cub packs in the past to work on their Pinewood Derby cars.

    November 19, 2013

  • Jeff N.

    Yes, BY all means I will be there, I am building a combination CNC Mill and Lathe.

    November 19, 2013

  • Kelly

    DANG IT! I will be out of town. I am building a 4'X8' CNC router and would really like to attend. Maybe another time.

    November 19, 2013

  • A former member
    A former member

    Is it OK to bring my 7-year-old son?

    November 19, 2013

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