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Type: Posts; User: Project_Hopeless

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  1. Re: 80/20 with HGR25/HGH25 Linear Rails/Bearings

    My Z axis concept is very similar to your design so I was wondering...

    What thickness and type of aluminum are the two main plates? How wide are the plates.

    With some time on the machine now,...
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    Power Relay Location

    So I'm thinking about a 40A power relay to control my router for off/on/e-stop. The economical ones seem to all be open contact style.

    Doesn't the arcing contacts generate a lot of EMI, RFI? ...
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    Re: Timing Belt Opinions

    Yes it will drive a 1204 ball screw.

    I'm trying to get the CG lower on the machine. Direct drive will have the motor high in the air. Seems like a lot of mass up high during high speed moves. ...
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    Timing Belt Opinions

    For my DIY CNC router I'm thinking about using 2GT-3M timing belt and pulleys, 1:1 ratio for my Z axis. It will reduce the machine height compared to my direct drive concept.

    I was thinking 30...
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    SBR Bearing Adjustment

    On a SBR bearing block (round linear rail) is the adjustment screw loctite in place or just set and left alone?
    ...
  6. Re: How Do You Tram Your Router - Wood Build

    I just might have a piece left over from my fireplace hearth I can use. Who would have thunk it :)
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    Re: Motor Coupling Question

    This is it.

    426310

    I'm not sure but a single 3mm screw dosen't seem like it can be torqued down enough.
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    Motor Coupling Question

    My ball screw kit came with 6.5x10mm motor coupling and I need 8x10mm. So I could drill out the ones I have. But I question how good these are to begin with.

    They are an aluminum alloy slit...
  9. Re: How Do You Tram Your Router - Wood Build

    Yes exactly.

    I'm mulling over my Z axis design and was thinking how can I build in some adjustment. Initially I was going with aluminum plate for my Z Axis and I looked at this tram plate as an...
  10. How Do You Tram Your Router - Wood Build

    I see a lot of fancy tram plates for various metal builds.

    What mechanism do you use to tram your router on a build out of plywood, MDF or similar material?
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    Re: wire requirements

    Don't forget multi core cables are de-rated when compared to the same AWG in free-air for current capacity.
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    Re: Is it cheeper to build

    I'm running LinuxCNC and Fusion 360, both free. Mach4 probably a little easier to learn, a more complete package but more $$.


    Nema 34 is the mount/frame size. You need to size for the...
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    Re: Is it cheeper to build

    Your PM is not enabled.
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    Re: Is it cheeper to build

    I'll see what I have, I'll PM some.

    In the meantime I sourced the web for ideas and have drawn inspiration from some of these builds that match what I had in mind.

    This is the build that got me...
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    Re: Is it cheeper to build

    Exactly, spot on.

    I might add there are "wants" and there are "needs". I wanted a large form machine that could handle soft metals and mild steel but really only needed a router for wood/plastic...
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    Re: Is it cheeper to build

    I'm in the build process for a 4x4ft. Birch-Ply. Should come in under $2500 USD. Ball screw, SBR bearings, steppers, Mesa controler.

    425426
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    Re: Spoil/Waste Board Questions

    I'm skeptical. I would think the resin and plastics would melt onto your cutter.
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    Re: Spoil/Waste Board Questions

    If the spoil board is glued down to the table how do you change it out when the time comes?
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    Re: Spoil/Waste Board Questions

    What I'm trying to decide is whether to use 6-8 t-tracks and MDF strips, or a single 4x4' board and a whole lot of t-nuts.

    If I go t-nuts in a 4x4' 3/4" MDF is it enough to use only 4 bolts at the...
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    Re: Spoil/Waste Board Questions

    Understood. Really just looking for a low cost yet effective solution.
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    Re: Spoil/Waste Board Questions

    Gerry,

    Are there pictures of your board setup? I curious how it works.

    So with your board the 1/2" MDF is the spoil board, the 3/4" just holds the t-nuts. No issue with pull-out or...
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    Spoil/Waste Board Questions

    I'm in the process of building a birch plywood CNC router 4x4 ft. with a 5x5 ft. 3/4" torsion box base.

    I see MDF boards with t-slots cut and can't imagine it having enough clamping force. So...
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    DM542T Differential Input

    I have a StepperOnline DM542T digital drive. The manual says it supports differential input for Step and Dir.

    Is anyone using the drive in differential mode?
  24. Stepper Motor Spec. Sheet Question

    I can't seem to find a definitive answer to the question...

    When a spec sheet simply says 3.5A / phase, would you expect that to be the peak or RMS value?
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    Re: Controller Wiring Type

    I know. My thought was to use a jacketed 4, 5, or 6 conductor wire and use the same wire for the stepper motors that are stationary. It seemed that any twisted or shielded wire was cheapest by the...
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