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  1. #11
    Ok. Z AXIS design time. What is the acceptable leverage ratio of a sturdy Z?

    My length of linear rail is 450mm. I was hoping for 300mm
    Of cutting depth but it seems like there would be excessive difficulty keeping my Z cutting straight with a 150mm (1/3 ratio) binding area for the spindle on a 450mm run. What do you all suggest?

    Also, would be wiser to mount the linesr bearings on the spindle plate or on the gantry plate?

  2. #12
    Rails on the spindle plate. To make a variable lever. Bearing blocks spaced at 50% of z travel and as wide as possible.

    I'll let the resident experts correct me if I am wrong. I'm still drawing up my design. However, this is my understanding.

  3. #13
    X and Y axis bolted and mounted. Was a very tight fit on the Y axis bearing blocks but It fits like a glove :)

    Click image for larger version. 

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  4. #14
    Few more updates. a redesign of the Z axis and some major work to keep it all straight. moves very smoothly now. Z axis is 6mm steel. working on the ball screws next.

    Here's a quick vid of the movement:

    Here's some photos.
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  5. The Following User Says Thank You to Slixxor For This Useful Post:

  6. #15
    OK, so progress has been slow but i've finalized and purchased the electronics.

    PSU's: 70v 5.7A Switchmode PSU.

    Drivers: 2MA860H.

    Manufacturer Part Number 23HS45-4204S
    Step Angle 1.8°
    Holding Torque 3.0Nm(
    Rated Current/phase 4.2A
    Phase Resistance 0.9ohms
    Recommended Voltage 24-48V
    Inductance 3.8mH±20%(1KHz)
    Weight 1.8kg

    Thanks to CliveS and the others on suggesting not buying a kit.

    More to come shortly. there have been some more changes :)

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