1. Do not share user accounts! Any account that is shared by another person will be blocked and closed. This means: we will close not only the account that is shared, but also the main account of the user who uses another person's account. We have the ability to detect account sharing, so please do not try to cheat the system. This action will take place on 04/18/2023. Read all forum rules.
    Dismiss Notice
  2. For downloading SimTools plugins you need a Download Package. Get it with virtual coins that you receive for forum activity or Buy Download Package - We have a zero Spam tolerance so read our forum rules first.

    Buy Now a Download Plan!
  3. Do not try to cheat our system and do not post an unnecessary amount of useless posts only to earn credits here. We have a zero spam tolerance policy and this will cause a ban of your user account. Otherwise we wish you a pleasant stay here! Read the forum rules
  4. We have a few rules which you need to read and accept before posting anything here! Following these rules will keep the forum clean and your stay pleasant. Do not follow these rules can lead to permanent exclusion from this website: Read the forum rules.
    Are you a company? Read our company rules
Shared accounts will be removed Plugin Downloads Zero spam policy Forum Rules

New linear actuator design

Discussion in 'Motor actuators and drivers' started by Aerosmith, Aug 19, 2024.

Page 2 of 2
  1. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    I got the bushings for the rotating ball-nuts and the bearings.
    bushings.jpg
    So I think I should have all parts, now, to assemble two prototypes. Unfortunatelly, my 3D-printer broke down. The Hot-end doesn't heat up anymore. The heating resistor seems OK (~10ohm) so I think it's a broken ribbon cable.
    • Like Like x 3
    Aerosmith, Sep 30, 2024
    #21
  2. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    Yay, the 3D printer is working, again. :grin
    spacer-block.jpg
    As I suspected, one of the ribbon cables and an FPC connector was broken. But I later found out the idler of the extruder also was. I normally don't like ordering at Amazon, but when it comes to urgent spare parts their prime shipping saves the day.
    • Like Like x 1
    Aerosmith, Oct 3, 2024
    #22
  3. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    Unfortunatelly, my own (cheap chinese) lathe is not precise enough to make the bushings. So I asked a friend to make it for me. But I forgot to tel him the tolerances for max. runout and, of course according to Murphy's law, it went wrong. The bushings from post #21 had 0.25mm asymetric runout which would lead to the ball screws staggering 1.8mm at the end. So we decided to make new ones.
    bushings2.jpg
    I'll check them nbext weekend and hopefully can finally assemble one or two actuators.
    • Like Like x 1
    Aerosmith, Oct 8, 2024
    #23
  4. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    This time the bushing fitted perfect with a runout below 0.01mm. The spindle runs smooth and without staggering.

    Now, I need to weld the aluminium tubes and buy the timing belts.

    (BTW: the irritating timing belt noise in the background is my Pick&Place machine)
    • Like Like x 3
    Last edited: Oct 14, 2024
    Aerosmith, Oct 14, 2024
    #24
  5. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    My friend Ingo helped me welding the aluminium tubes. It went much better than we first expected.
    Actuator-Weld1.jpg Actuator-weld2.jpg Actuator-spindle.jpg
    Actuator-Ujoint.jpg Actuator-whole.jpg
    I'm not really happy with the 3D printed spacer block, though. It shows some warping at the corners so if I tighten the screws too much the ball bearings get too stiff. I think I mechine them from solid metal, next time. And I miscalculated the distance of the motor axis to the spindle. AT5 timing belts are available with 340mm length but HTD5M only come in 330 or 350mm length.:confused:I have to make a new motor mounting plate. But that's why we make prototypes...
    • Like Like x 3
    Aerosmith, Oct 16, 2024
    #25
  6. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    Pulleys added
    Actuator-Pulleys.jpg
    • Like Like x 3
    Aerosmith, Oct 19, 2024
    #26
  7. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    Today I ran the first test with the servo motor attached

    Stroke, noise and speed are OK but I'm not really happy with the big pulley. I machined the bore hole with my own lathe but the runout is quite bad. Next time I order the pulleys from a manufacturer who can customize the bore hole.
    • Like Like x 3
    Aerosmith, Nov 3, 2024
    #27
  8. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    Mass production started... :D
    Tubes.jpg Production1.jpg
    • Like Like x 4
    Aerosmith, Nov 3, 2024
    #28
  9. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    Some more pulleys have arrived.
    Pulleys.jpg
    • Like Like x 2
    Aerosmith, Nov 16, 2024
    #29
  10. Aerosmith

    Aerosmith Active Member

    Joined:
    May 30, 2024
    Messages:
    247
    Occupation:
    self employed
    Location:
    Germany
    Balance:
    1,446Coins
    Ratings:
    +131 / 0 / -0
    My Motion Simulator:
    3DOF, AC motor
    Unfortunatelly, at the end of the year the workload increases and there is less time left for fun stuff...
    But at least there is some progress. Mass production continues:
    Bearing-plate_x20.jpg
    • Like Like x 3
    Aerosmith, Nov 29, 2024 at 18:04
    #30
Page 2 of 2