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Question DC 24v Wheelchair motor converted to linear actuator. Accuracy, any point?

Discussion in 'Motor actuators and drivers' started by Trigen, Aug 4, 2020.

  1. Trigen

    Trigen Active Member

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    I got some 24 wheelchair motors at 200w 3700 reduced to 116 RPM on its default gearbox. I'd like to convert and use a linear balls crew guide. Im unsure of the accuracy it will have given that it moves a about 2mm each cog when i turn it. Perhaps a new planetary gearbox 30:1 would be better? What im really after is no backlash or at least as little as possible. Its rather large on these worm gears and as a seat/backrest sway its just to much as i wish to feel all the detail. It dont really need that much torque to move just my body from side to side.

    Its a bit tricky on the shaft but i can make something work if i can find the correct dimensions. Or i can 3d print a bracket. The coupling it has now is actually just rubber and the shaft is protruding 5mm. A pin should be able to sort this out anyhow.

    What do you think?

    sunrise dc motor.jpg


    https://www.aliexpress.com/item/400...earchweb0_0,searchweb201602_,searchweb201603_
    Trigen, Aug 4, 2020
    #1
  2. Gadget999

    Gadget999 Well-Known Member

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    Give it a try on one actuator and see if it works

    How many motors do you have
    Gadget999, Aug 6, 2020
    #2
  3. Trigen

    Trigen Active Member

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    I got 4 of them. Shipping is a bit expensive for the parts though so id do all 4 if i commit to it. At the worst id have 4 slider tables which im sure i can use at a later point anyway
    Trigen, Aug 6, 2020
    #3
  4. Gadget999

    Gadget999 Well-Known Member

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    What do the slider tables look like ?
    Gadget999, Aug 6, 2020
    #4
  5. adgun

    adgun Active Member

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    Hi
    With one of those sliders and youre motor directly directed to screw, you will get
    1204 screw 70kgf and 24,5 mm/sec at rated motor power
    With a 1605 screw 55kgf and 300mm/sec
    1610 screw 28kgf and 600mm/sec
    hope this helps
    regards Ad
    • Like Like x 2
    adgun, Aug 6, 2020
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  6. Trigen

    Trigen Active Member

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    Check the link on the bottom of the org post.

    Thanks. Good info :) That should be more than enough for the back slider and probably fine for the seat. Will be a 100mm system so 50 each way. The seat wont be resting on the slider table but additional sliders which further helps.
    Trigen, Aug 6, 2020
    #6