1. #1
    Hi,


    It has been for a few years in my thoughts, and is finally coming a reality ! I migrated from cmc-zone to here because I heard you guys like steel builds :)


    I am planning on making a steel build. I join to this post the Sketchup model, hoping that you can give me your thoughts on it and help me improve the design before I start buying parts and building.


    So far, I am thinking:
    - 12x12cm beams on the side
    - 10x20cm gantry beam
    - SBR20UU on X,Y,Z
    - rack and pinion on X,Y
    - leadscrew on Z
    - 2.2kw chinese water cooled spindle with VFD


    I already own (from a previously failed MDF build based on buildyourcnc.com's tutorials):
    - 3 x Nema 23 425oz
    - 3 x Stepper Drivers CW230
    - Power Supply 36V 9.7A
    - 6 x limit switches
    - 5 Axis Controller with parallel port
    - PC with parallel port
    - Mach 3
    - E-STOP
    - Bunch of electrical cable


    I am looking forward for your advice !


    Cheers,
    Eurikain.


    PS: I can't weld, but I have access to a welder shop that will do the work for me. I could learn, though :)
    Attached Files Attached Files

  2. #2
    you only need 3 limit switches :D

  3. #3
    Quote Originally Posted by Blackrat View Post
    you only need 3 limit switches :D
    You need two limit switches per axis, one for each end of the axis.

  4. #4
    or you can put the switch on the moving part and have two stops ;-)

  5. #5
    Quote Originally Posted by Blackrat View Post
    or you can put the switch on the moving part and have two stops ;-)
    Hmm, right, but they are one direction switches, so such a placement would require a mechanism for translating bi-directional pressure to one directional.

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