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

Sort of DIY

Discussion in 'Commercial Simulators and Peripherie' started by Thick8, Feb 15, 2025 at 03:34.

  1. Thick8

    Thick8 New Member

    Joined:
    Jan 1, 2025
    Messages:
    22
    Balance:
    116Coins
    Ratings:
    +6 / 0 / -0
    My Motion Simulator:
    2DOF
    I bought a used (broken) DOF reality P3 cheap. As I only fly helicopters and small GA planes in MSFS, I found the backlash and cogging to be very jarring and totally immersion breaking. DR's putting together a kit like I'm building, but it will be some time before it's available for my model and the cost will be pretty high compared to what I payed for the machine. So I decided to mod it myself. I've mentioned this rig in a couple other thread but thought I should move it here and document the procedure. I want to start with a question though.
    I purchased the 5:1 planetary gearboxes prior to doing the math. I even cut one to fit the motor. Was a serious learning curve regarding precision aluminum machining, but I now have the proper measuring tools and knowledge to do it; so i can't begrudge the $65 I spent on the box if it proves to be useless for my needs.
    I can send the other gearbox back and get 3:1 boxes if the 5:1 stop-to-stop time is not acceptable. NOTE: I'm older with a not-so-great back, so I don't want to be slung all over the place.
    I'm using the original motors and mounting point on the rig that DOF Reality used so I know the geometry works.
    Here's my math.

    Motor speed = 3000 RPM = 50 RPS
    1605 ball screw = 5mm per/rotation
    Total length of ballscrew travel = 70mm

    5:1 GEARBOX: 50 RPS / 5 = 10 RPS = 1.4 seconds stop-to-stop.
    3:1 GEARBOX: 50 RPS / 3 = 16.67 RPS = 0.839 seconds stop-to-stop.

    Total distance of actuator arm travel = 92mm. This is 90 degrees of total rotation, using the existing DR actuator arm, with the seat link located in the last hole.

    What do you guys think? Keep the 5:1 gearboxes so I only have to cut one more, or get the 3:1 gearboxes?

    Gearbox input housing removed,
    20250212_113539.jpg
    Mounted,
    20250212_113732.jpg
    cut,
    20250212_150454.jpg
    Finished,
    20250212_164555.jpg
    Fitted,
    20250212_170424.jpg
    • Useful Useful x 1